3400 Abreviaciones de Cable Telecomunicaciones

https://industrialcalculation.wordpress.com/2014/08/08/abbreviation-of-it-itetwork-related-words/

All complete Abbreviation of IT and Network related words:
Abbreviations and Acronyms
μsec Microsecond
1xRTT Single Carrier Radio Transmission Technology
2G 2nd Generation
3DES Triple Data Encryption Standard
3DTV Three Dimensional Television
3G 3rd Generation
3GPP Third Generation Partnership Project
3GPP2 Third Generation Partnership Project 2
4C Consortium of Intel, IBM, Matsushita, and Toshiba
4G Fourth Generation
4WM Four Wave Mixing
5C Consortium of Intel, Sony, Matsushita, Toshiba, and Hitachi
8VSB 8-level Vestigial Sideband
A/D Analog to Digital
A/D/A Analog to Digital to Analog
A/O Additional Outlet
A/V Audio/Video
AAA Authentication, Authorization, and Accounting
AAAA American Association of Advertising Agencies
AAC Advanced Audio Codec/Coding
AACS Advanced Access Content System
AAS Adaptive Antenna System
ABC American Broadcasting Corporation
ABSBH Average Busy Season Busy Hour
AC Access Category
AC Alternating Current
AC_BE Access Category – Best Effort
AC_BK Access Category – BacKground
AC_VI Access Category – VIdeo
AC_VO Access Category – VOice
AC3 Adaptive Transform Coder 3
AC-3 Audio Coding Revision 3
ACAP Advanced Common Application Platform
ACD Automated/Automatic Call Distribution
ACK Acknowledge(ment)
ACL Access Control List
ACL Applications Connection-Less
ACM Adaptive Coding and Modulation
ACORN A Classification of Residential Neighborhoods
ACS Ad Content Service
AD Activity Detection
ADI Asset Distribution Interface
ADI Asynchronous Digital Interface
Ad-ID Advertising-Digital Interface
ADM Ad Management Service
ADM Add/Drop Multiplexing
ADPCM Adaptive Differential Pulse Code Modulation
ADS Ad Decision Service
ADSL Asymmetric Digital Subscriber Line
ADSL2 Asymmetric Digital Subscriber Line and Annex J (Supports higher bandwidth)
ADSL2+ Asymmetric Digital Subscriber Line and Annex L (Supports higher bandwidth)
AES Advanced Encryption Standard
AF Abstract Framework
AF Application Function
AF Assured Forwarding
AGC Automatic Gain Control
Agg-PE Aggregation Provider Edge
AGI Attachment Group Identifier
AGW Access Gateway
AI Artificial Intelligence
AIFS Arbitration InterFrame Space
AIN Advanced Intelligent Network
AIS Alarm Indication Signal
AIT Application Information Table
AKA Authentication and Key Agreement
ALG Application Layer Gateway
AM Amplitude Modulation
AM Application Manager
AMA Automatic Message Accounting
AMI Alternate Mark Inversion
AMOL Automated Measurement Of Lineup
A-MPDU Aggregated MAC (Media Access Control) Protocol Data Unit
AMPS Advanced Mobile Phone Service
AMS Asset Management System
ANA Association of National Advertisers
ANC Announcement Controller
ANF Aggregate Noise Factor
ANP Announcement Player
ANSI American National Standards Institute
AOD Advertising On Demand
AOL America On-Line
AoR Address of Record
AP Access Point
AP Automatic Power
APD Avalanche Photo Diode
API Application Programming Interface
APM Alternate Provisioning Mode
APON ATM Passive Optical Network
APON ATM-based Passive Optical Network
Apps Applications
APS Analog Protection System
APSK Amplitude Phase Shift Keying
A-RACF Access – Resource and Admission Control Function
ARCNET Attached Resource Computer Network
ARF Advertising Research Foundation
ARIB Association of Radio Industries and Businesses
ARIN American Registry of Internet Numbers
ARP Address Resolution Protocol
ARPU Average Revenue per Unit (or User)
ARQ Automatic Repeat Request
AS Application Server
AS Autonomous System
ASAP As Soon As Possible
ASCII American Standard Code for Information Interchange
ASD Authorized Service Domain
ASF Advanced Streaming Format
ASF Advanced Systems Format
ASI Asynchronous Serial Interface
AsiaPac Asia Pacific
ASIC Application-Specific Integrated Circuit
ASM Any Source Multicast
ASM Asset Management System
ASN Access Service Network
ASP Average Selling Price
ASP Application Service Provider
ASR Access Switch Router
ASTB Advanced Set-Top Box
ASTD American Society for Training and Development
ASX Advanced Stream Redirector
AT Advanced Technology
ATA Advanced Technology Attachment
ATDMA Advanced Time Division Multiple Access
A-TDMA Advanced Time Division Multiple Access
ATDMA Asynchronous Time Division Multiple Access
ATE Automated Test Environment
ATIS Alliance for Telecommunications Industry Solutions
ATM Asynchronous Transfer Mode
AToM Any Transport Over MPLS
ATP Adaptive Transmission Protocol
ATSC Advanced Television Systems Committee
ATTN Attenuator
AUP Acceptable Use Policy
AV Audio/Video
AV Audiovisual
AVC Advanced Video Coding
AVI Advanced Video Interface
AVI Audio Video Interleave
AWGN Additive White Gaussian Noise
AWS Advanced Wireless Services
AWT Abstract Window(ing) Toolkit
B2BUA Back-to-Back User Agent
B8ZS Binary 8 Zero Substitution
BA Behavioral Aggregate
BAF Bellcore AMA Format
BB Baseband
BB Broadband
BBTV Broadband Television
BC Broadcast
BC/NC Broadcast/Narrowcast
BC-BS Backwards-Compatible Broadcast Services
BCID Billing Correlation Identifier
BDF Broadband Digital Forward
BDR Baseband Digital Reverse
BE Best Effort
BER Bit Error Rate
BERT Bit Error Rate Test
BFS Broadcast File System
BGCF Breakout Gateway Control Function
BGF Border Gateway Function
BGP Border Gateway Protocol
BGP-VPLS Border Gateway Protocol-Virtual Private LAN Service
BGW Border Gateway
BICSI Building Industry Consulting Services International
BIF Binary Interchange Format
BIG Broadband Integrated Gateway
BITS Building Integrated Timing Supply
bits/sym Bits per Symbol
BIU Broadband Interface Unit
BMS Business Management System
BNN Bit-Error-Rate in the Noise Notch
BoD Broadcast on Demand
BOM Bill of Material
BOSS Back Office Support System
BP Boundary Point
BP@L1b Baseline Protocol at Level 1b
BPF Band-Pass Filter
BPI Baseline Privacy Interface
BPI+ Baseline Privacy Interface Plus
BPL Broadband over Power Lines
BPON Broadband Passive Optical Network
B-PON Broadband Passive Optical Network
bps Bits Per Second
BRAS Broadband Remote Access Server
B-RAS Broadband Remote Access Server
BRI Basic Rate Interface
BRI Brand Rating Index
BRS Broadband Radio Service
BS Base Station
BS Broadcast Services
BSC Base Station Controller
BSS Basic Service Set
BSS Business Support System
BTS Base Transceiver Station (Wireless Telephony)
BTS Business Telecom Services
BTSC Broadcast Television Systems Committee
BTU British Thermal Unit
BTU/hr British Thermal Unit Per Hour
BW Bandwidth
BW/QAM Bandwidth per QAM
BYOI Bring Your Own Infrastructure
C/N Carrier to Noise Ratio
C/N0 Carrier-to-Noise-density Ratio
CA Mgmt Conditional Access Management
CA Call Agent
CA Conditional Access
CA Content Archive
CAB Cable Advertising Bureau
CAC Call Admission Control
CAC Connection Admission Control
CAC Connetiont Admission Control
CAD Computer Aided Design
CAGR Compound Annual Growth Rate
CALA Central America and Latin America
CALEA Communications Assistance for Law Enforcement Act
CAN Cellular Access Network
Canitec Camara Nacional de la Industria Television por Cable
CapEx Capital Expenditure
CAPMAN Capacity Management
CAS Channel Associated Signaling
CAS Conditional Access Server
CAS Conditional Access System
CAT Conditional Access Table
CAT5 Category 5
CATV Community Antenna Television (or Cable Television)
CB Channel Bonding
CB Citizen Band
CBI Character-Based Interface
CBR Constant Bit Rate
CBT Computer Based Testing (or Training)
CBT Core-Based Trees
CC Convolutional Coding
CCC Circuit Cross Connect
CCCF Call Continuity Control Function
CCCM CPE Controlled Cable Modem
CCDF Complementary Cumulative Distribution Function
CCI Content Control Information
CCI Copy Control Information
CCK Complimentary Code Keying
CCM Channel Change Message
CCM Constant Coding and Modulation
CCNR Completion of Calls No Reply
CCP Channel Change Protocol
CCR Call Completion Ratio
CCS Centum Call Seconds
CCS Common Channel Signaling
CCS Completed Call Seconds
CD Chromatic Dispersion
CD Compact Disc
CDC Changed Data Capture
CDC Connected Device Configuration
CDF Channel Definition Format
CDF Charging Data Function
CDMA Code Division Multiple Access
CDN Content Delivery Network
CDN Content Distribution Network
CDPD Cellular Digital Packet Data
CDR Call Detail Record
CD-ROM Compact Disk-Read Only Memory
CDS Content Delivery System
CE Consumer Electronics
CE Content Entity
CE Customer Equipment
CEA Consumer Electronics Association
CEBus Consumer Electronic Bus
CENTREX CENTRal office EXchange service
CEO Chief Executive Officer
CEP Cable Entry Point
CEPCA Consumer Electronics Powerline Communication Alliance
CER Codeword Error Ratio
CES Circuit Emulation Service
CESoPSN Circuit Emulation over Packet Switching Networks
CESoPSN Circuit Emulation Service over Packet Switched Network
CE-VLAN Carrier Ethernet – Virtual Local Area Network
CFO Chief Financial Officer
CFP Contention Free Periods
CG Character Generator
CGMS-A Copy Generation Management System – Analog
CH CableHome™
CH CableHome™ Host
Ch Channel
CHILA Cable Host Interface Licensing Agreement
CIDR Classless InterDomain Routing
CIFS Common Internet File System
CIM Common Information Model
CIN Call Indentity Number
CIN Converged Interconnect Network
CINIT Centro de Investigacion e Innovacion en Telecomunicaciones (CINIT)
CIR Committed Information Rate
CIT Constrained Image Trigger
CLASS Custom Local Area Signaling Services
CLDC Connected(ion) Limited Device Configuration
CLE Customer Located Equipment
CLEC Competitive Local Exchange Carrier
CLI Command Line Interface
CLI Cumulative Leakage Index
CLID Caller Identification
CLR Common Language Run-time
CLV Consumer Lifetime Value
CM Cable Modem
CMCI CM (Cable Modem) To CPE (Customer Premises Equipment) Interface
CMIM Cable Modem Interface Mask
CMLA Content Management License Administrator
CMOS Complimentary Metal-Oxide Semiconductor
CMS Call Management Server
CMS Call Management Server
CMTS Cable Modem Termination System
CNAM Calling NAMe
CNAM Calling Name delivery
CNI Customer-to-Network Interface
CNIR Carrier-to-Noise plus Interference Ratio
CNIR Carrier-to-Noise/Ingress Ratio
CNR Carrier-to-Noise Ratio
CO Central Office
CO Connection Oriented
CODEC Coder/Decoder
Codec Encoder/Decoder
COLD Central Office Layout Design
Const Constellation
COPS Common Open Policy Service
CORBA Common Object Request Broker Architecture
CoS Class of Service
COT Central Office Terminal
CP Copy Protection
CPD Common Path Distortion
CPE Customer Premises Equipment
CPE Customer Provided Equipment
CPH Cost Per Household
CPM Cost per Thousand Impressions
CPMS Copy Protection Management System
CPPM Copy Protection for Prerecorded Media
CPRM Content Protection for Recordable Media
CPS Content Protection System
CPS Cost Per Subscriber
CPTWG Copy Protection Technical Working Group
CPU Central Processing Unit
CQ-MOS Conversational Quality Mean Opinion Score
CQoS CableHome™ Quality of Service
CQP CableHome™ QoS Portal
CRA Contention Resolution Algorithm
CRC Cyclic Redundancy Check
CRG CableHome™ Residential Gateway
CRL Certificate Revocation List
CR-LDP Constraint-based Label Distribution Protocol
CRM Customer Relationship Management
CS Circuit Switch(ed)
CSC Call Session Controller
CSCF Call Session (or State) Control Function
CSH Central Switch Homerun
CSMA/CA Carrier Sense Multiple Access with Collision Avoidance
CSMA/CD Carrier Sense Multiple Access with Collision Detection
CSO Composite Second Order
CSoD Commercial Services over DOCSIS®
CSR Customer Service Representative
CS-RZ Carrier-Suppressed Return-to-Zero
CSS Content Scramble(ing) System
CSU Channel Service Unit
CSV Comma Separated Value
CTAM Cable & Telecommunications Association for Marketing
CTB Composite Triple Beat
CTC Convolutional Turbo Coding
CTIA Cellular Telecommunications and Internet Association
CTO Chief Technology Officer
CTR Customer Trouble Report
CW Codeword
CW Continuous Wave
CWDM Coarse Wavelength Division Multiplexing
CWM Common Warehouse Metamodel
CY Calendar Year
D&B Dun and Bradstreet
D/S Downstream
DA Destination Address
DAC Digital Addressable Controller
DARPA Defense Advanced Research Projects Agency
DAS Direct Attached Storage
DAT Digital Audio Tape
DAT DOCSIS® Set-top Gateway Address Table
DAVIC Digital Audio Visual Council
DB Database
dB Decibel
DBA Dynamic Bandwidth Allocation
dBc Decibel Referenced to the Carrier
dBm Decibel milliwatt
dBmV Decibel milliVolt
dBmVrms Decibel milliVolt root mean square
DBPSK Differential Binary Phase Shift Keying
DBS Direct Broadcast Satellite
DC Direct Current
DC Directional Coupler
DC Dispersion Compensator
DCA Digital Cable Application
D-CAPMAN Dynamic Capacity Management
DCAS Digital Certificate Access Server
DCAS Downloadable Conditional Access System
DCC Data Communication Channel
DCC Dynamic Channel Change
DCD Disconnection Delay
DCD Downstream Channel Descriptor
DCF Dispersion Compensating Fiber
DCF Distributed Coordination Function
DCM Dispersion Compensation Module
DCP Device Control Protocol
DCR Digital Cable Ready
DCS Digital Cross-connect System
DCT Digital Communications (Cable) Terminal
DCT Discrete Cosine Transform
DDNS Dynamic Domain Name Service
DDoS Distributed Denial of Service
DE Default
DE Discard Eligible
DeCSS Defeat Content Scrambling System
DEN Directory-Enabled Networking
DENI Digital Entertainment Networking Initiative
DEPI DOCSIS External Physical Interface
DES Data Encryption Standard
DES Digital Encryption Standard
DF Delivery Function
DFAST Dynamic Feedback Arrangement Scrambling Technique
DFB Distributed Feedback
DHCP Dynamic Host Configuration Protocol
DHCPv6 Dynamic Host Configuration Protocol Version 6
DHCT Digital Home Communications Terminal
DHEI DigiCable Headend Expansion Interface
DHWG Digital Home Working Group
DIA Direct Internet Access
DIBA DOCSIS IPTV Bypass Architecture
DiffServ Differential Services
DiffServ Differentiated Services
DiffServ-TE Differentiated Services – Traffic Engineering
Div Division
DIX DEC-Intel-Xerox
DL Downlink
DLCI Data Link Connection Identifier
DLL Data Link Layer
DLNA Digital Living Network Alliance
DM Degraded Modem
DM Dispersion Mitigation
DMA Demographic Market Area
DMA Designated Marketing Area
DMC Dual Modem Cards
DMCA Digital Millennium Copyright Act
DMH Degraded Modem Hours
DML Direct Modulated Distributed Feedback Laser
DMP Digital Media Project
DMPT DOCSIS MPEG Transport
D-MPT DOCSIS MPEG Transport
DNCS Digital Network Control System
DNS Domain Name Server/Service
DOCSDIAG DOCSIS Diagnostic Program
DOCSIS Data over Cable Service Interface Specifications
DOCSIS® Data-Over-Cable Service Interface Specifications
DOCSIS®-RFI DOCSIS® Radio Frequency Interface
DoD Department of Defense
DoS Denial of Service
DPI Deep Packet Inspection
DPI Digital Program Insertion
DPON Deep-Fiber Passive Optical Network
DPON DOCSIS over Passive Optical Network
DPSK Differential Phase Shift Keying
DPT Dynamic Packet Transport
DQoS Dynamic Quality of Service
DQPSK Differential Quadrature Phase Shift Keying
DRAM Dynamic Random Access Memory
DRFI Downstream Radio Frequency Interface
DRM Digital Rights Management
DS Digital Signal
DS Downstream
DS0 Digital Signal 0 (zero)
DS1 Digital Signal 1
DS3 Digital Signal 3
DSA Dynamic Service Add
DSA-ACK Dynamic Service Add – Acknowledgement
DSA-REQ Dynamic Service Add – Request
DSA-RSP Dynamic Service Add – Response
DSCP Differentiated Service Code Point
DSG DOCSIS Set-top Gateway
DSID Downstream Service Identifier
DSL Digital Subscriber Line
DSLAM Digital Subscriber Line Access Multiplexer
DSLR Digital Signal Lens Reflex
DSM Digital Storage Media, DNCS Session Manager
DSM-CC UN Digital Storage Media Command and Control User-to-Network
DSM-CC Digital Storage Medium Command and Control
DSP Digital Signal Processor(ing)
DSSS Direct Sequencing Spread Spectrum
D-STB Digital Set-Top Box
DSU Data Service Unit
DS-x Digital Signal (level)
DSX Digital Signal Crossconnect
DSx Dynamic Service Change
DTCP Digital Transmission Content Protection
DTCP/5C Digital Transmission Content Protection/5 Companies
DTD Dial Tone Delay
DTE Data Terminal Equipment
DTH Direct To Home
DTI DOCSIS Timing Interface
DTMF Dual Tone Multi-frequency
DTV Digital Television
DUN Dial-Up Networking
DUT Device Under Test
DV Digital Video
DVB Digital Video Broadcast(ing)
DVB-ASI DVB (Digital Video Broadcast) Asynchronous Serial Interface
DVB-DSNG DVB (Digital Video Broadcast) Digital Satellite News Gathering
DVB-H/T Digital Video Broadcast –Handheld/Terrestrial
DVB-MHP Digital Video Broadcast Multimedia Home Platform
DVB-RCS DVB (Digital Video Broadcast) Return Channel via Satellite
DVB-S DVB (Digital Video Broadcast) Standard
DVD Digital Versatile Disc
DVD+R Recordable Digital Versatile Disc
DVD+RW Rewritable Digital Versatile Disc
DVDCCA Digital Versatile Disc Copy Control Association
DVI Digital Video Interface
DVMRP Distance Vector Multicast Routing Protocol
DVR Digital Video Recorder
DVS Digital Video Standard
DVS Digital Video Subcommittee
DWDM Dense Wavelength Division Multiplex
E-1 European format for digital transmission (Equivalent to the North American Digital
Hierarchy T-1)
E²R End-to-End Reconfigurability
EA-DFB Electro-Absorption Modulator Integrated Distributed Feedback Laser
EAP Extensible Authentication Protocol
EAS Emergency Alert System
EBIF Enhanced (TV) Binary Interchange Format
eBIF Enhanced Binary Interchange Format
EBITDA Earnings Before Interest, Taxes, Depreciation, and Amortization
eCM Embedded Cable Modem
ECM Entitlement Control Message
ECM:EPS Embedded Cable Modem: Embedded Portal Option
ECN Engineering Change Notification
ECO Engineering Change Order
ECR Efficient Consumer Response
ECR Engineering Change Request
EDC Electronic Dispersion Compensator
EDCA Enhanced Distributed Channel Access
EDFA Erbium Doped Fiber Amplifier
EDGE Enhanced Data Rates for Global Evolution
eDOCSIS™ Embedded Data-Over-Cable Service Interface Specifications
EF Expedited Forwarding
EFM Ethernet in the First Mile
EFMS Error Free Milliseconds
EFS Error Free Seconds
EFSR Error Free Seconds Ratio
EHDR Extended Header
EIA Electronics Industry Association
EIC Entertainment, Information, and Communications
EIR Excess Information Rate
EIRP Effective Isotropic Radiated Power
EIS/SCS Event Information Scheduler/SimulCrypt Synchronizer
ELA Ethernet Line Aggregation
E-LAN Ethernet Local Area Network
E-LINE Ethernet Line
E-LSP EXP-Inferred-PSC Label Switch Path
EM Element Manager
EMEA Europe, Middle East and Asia
EMI Electro-Magnetic Interference
EMI Encryption Mode Indicator
EML Externally Modulated Laser
EMM Entitlement Management Message
EMS Element Management System
eMTA Embedded Multimedia Terminal Adapter
EMx Element Manager X
ENDEC Encode/Decode
ENM Estimated Noise Margin
ENR Encryption Not Required
ENUM Electronic Number Mapping
ENUM Electronic Numbers
ENUM Telephone Number Mapping
E-O Electrical-Optical
EoD Entertainment on Demand
EoD Everything on Demand
EOL End of Line
EoMPLS Ethernet over MPLS
EoRPR Ethernet over Resilient Packet Ring
EoSonet Ethernet over SONET
EP End Point
EPG Electronic Program Guide
EPL Ethernet Private Line
EP-LAN Ethernet Private – Local Area Network
EPN Encryption Plus Nonassertion
EPON Ethernet Passive Optical Network
EPRI Electric Power Research Institute
EQ Equalization
EQAM Edge QAM (Quadrature Amplitude Modulation)
ER Edge Router
ERIM Erasmus Research Institute of Management
ERM Edge Resource Manager
ERMI Electronic Resource Management Initiative
ERT-VR Extended Real Time-Variable Rate
ES Elementary Stream
ES Errored Seconds
ES Exclusive Session
ES/N0 Energy per symbol-to-Noise density Ratio
eSAFE Embedded Service/Application Functional Entity
ESC Embedded Signaling Channel
ESCON Enterprise System Connection
ESCON/FC Enterprise System Connection/Fiber Channel
ESF Extended SuperFrame
ESM EOD Server Manager
ESP Encapsulating Security Payload
ESR Error Seconds Ratio
eSTB Embedded Set-Top Box
ET (SCTE’s ) Emerging Technologies Conference
eTOM enhanced Telecom Operations Map
ETSI European Telecommunications Standards Institute
ETTH Ethernet To The Home
ETTx Ethernet To The x (end point)
eTV Enhanced Television
ETV Enhanced Television
EVA Error Vector Analysis
EVC Ethernet Virtual Circuit
EVDO Evolution Data Optimized
EVM Error Vector Magnitude
EVPL Ethernet Virtual Private Line
EVPL Ethernet Virtual Private Line
EVPLAN Ethernet Virtual Private Local Area Network
EXC Electronic Cross Connect
EX-MOD Externally Modulated
EXP Experimental
FAQ Frequently Asked Question
FastE Fast Ethernet
FBI Federal Bureau of Investigation
FC Fibre Channel
FC-AL Fiber Channel – Arbitrated Loop
FCAPS Fault, Configuration, Accounting, Performance and Security
FCC Federal Communications Commission
FCP Fibre Channel Protocol
FCRC Fragment Cyclic Redundancy Check
FCS Frame Check Sequence
FDC Forward Data Channel
FDD Frequency Division Duplex
FDDI Fiber Distributed Data Interface
FDM Frequency Division Multiplexing
FE Fast Ethernet
FE Fast Ethernet
FEC Forward Error Correction
FEC Forwarding Equivalence Class
FF Fast Forward
FFT Fast Fourier Transform
FGPS FEC, Guard time, Preamble, Stuffing bytes
FHCS Fragment Header Check Sequence
FHSS Frequency Hopping Spread Spectrum
FICON Fiber Connection
FIFO First In-First Out
FiOS Fiber Optic System(s)
FIR Finite Impulse Response
FLR Frame Loss Ratio
FLS Frame Loss Seconds
FM Frequency Modulation
FMC Fixed Mobile Convergence
FN Fiber Node
FOADM Fixed Filter Optical Add/Drop Multiplexer
FOD Free on Demand
FoD Free Video On Demand
FOSC Fiber Optic Splice Closure
FP Fabry-Perot
FQDN Fully Qualified Domain Name
FR Fiber Ring
FR Frame Relay
FRAG Fragmentation
Freq Resp Frequency Response
FRR False Rejection Rate
FRR Fast Re-Route
FSAN Full Service Access Network
FS-CWDM Full Spectrum – Coarse Wave Division Multiplexing
FSK Frequency Shift Keying
FSN Full Service Network
FSO Free Space Optical
FTP File Transfer Protocol
FTTB Fiber to the Business
FTTC Fiber to the Curb
FTTH Fiber to the Home
FTTN Fiber to the Node
FTTP Fiber to the Premises
FTTR Fast Time To Repair
FTTU Fiber to the User
FTTW Fiber to the Wireless
FTTWAP Fiber to the Wireless Access Point
FTTx Fiber to the (endpoint)
FTTX Fiber to the Exchange
FUD Fear, Uncertainty and Doubt
FW Firewall
FWA Fixed Wireless Access
FWM Four-Wave Mixing
FXO Foreign eXchange Office
FXS Foreign eXchange Station
G2B Go2BroadbandSM
GA Genetic Algorithm
GaAs Gallium Arsenide
GAC Genetic-based Admission Control
GARP Generic Attribute Registration Protocol
GB Gigabyte
GB/s Gigabits per Second
GbE Gigabit Ethernet
GBIC Gigabit Interface Converter
Gbps Gigabits per Second
GC Gateway Controller
GCC General Communications Channel
GCF Breakout Gateway Control Function
GDV Group Delay Variation
GE RPR Gigabit Ethernet Resilient Packet Ring
GE Gigabit Ethernet
GEM Globally Executable MHP
GE-PON Gigabit Ethernet Passive Optical Network
GFL Group Flow Label(s)
GFP Generic Framing Procedure
GFP-F Generic Framing Procedure-Framed
GFP-T Generic Framing Procedure-Transparent
GFP-T Transparent Generalized Framing Procedure
GGSN Gateway GPRS (General Radio Packet Service) Support Node
GHz Gigahertz
GigE Gigabit Ethernet
GIGO Garbage In, Garbage Out
GIS Geographic Information System
GMPLS Generalized Multi-Protocol Label Switching
GNT Grant
GOP Group of Pictures
GOPS Graphical Operations per Second
G-PON Gigabit (Ethernet) Passive Optical Network
GPON Gigabit Passive Optical Network
GPRS General Packet Radio Service
GPS Global Positioning System
GQoS Generic Quality of Service
GR Generic Requirement
GRE Generic Routing Encapsulation
GRM Global Resource Manager
GRP Gross Rating Point
GRX GPRS (General Packet Radio Service) Roaming eXchange
GS Global Server
GSM Global System for Mobile (communications)
GSMA Global System for Mobile communications Association
GSN GPRS (General Packet Radio Service) Support Node
GSRM Global Session & Resource Management
GSRM Global System Resource Manager
GTP GPRS Tunneling Protocol
GTT Global Title Translation
GUI Graphical User Interface
GUPI Global Universal Provisioning Interface
GVRP GARP VLAN Registration Protocol
GW Gateway
GWC Gateway Controller
H&S Hub and Spoke
HA High Availability
HAL Hardware Abstraction Langugae
HAN Home Area Network
HAS Hardware Authentication Server
HAVi Home Audio Video Interoperability
HBO Home Box Office
HCCA Hybrid Coordination function controlled Channel Access
HCF Hybrid Coordination Function
HCRP Hard Copy Cable Replacement
HCS Header Check Sequence
HD Hardware
HD High Definition
HDBH High-Day Busy Hour
HDCP High-bandwidth Digital Content Protection
HDD Hard Disk Drive
HDLC High-Level Data Link Control
HDMI High Definition Multimedia Interface
HDPBH High Day Peak Busy Hour
HD-PLC High Definition-ready Powerline Communications
HDR Header
HDSDI High Definition Serial Digital Interface
HDT Host Digital Terminal
HDTV High Definition Television
HDVoD High Definition Video on Demand
HD-VOD High Definition-Video on Demand
HE Headend
HEC Headend Controller
HEM Headend Modem
HFC Hybrid Fiber/Coax
HGW Home Gateway
HH HouseHold
HHP Households Passed
Hi-PHY High Performance Physical Layer
HIS High-Speed Internet
HIT Headend Interface Terminal
HITS Headend In The Sky
HLR Home Location Register
HMS Headend Management System
HMS Home Media Server
HMS Hybrid Management Sub-layer
HN Home Network
H-Net Home Network
HNv1 Home Networking Version 1
HOD HBO On Demand
HOM High-Order Modulation
HomePNA™ Home Phoneline Networking Alliance
HP Homes Passed
H-PCRF Home Policy and Charging Rules Function
HPF High Pass Filter
HPLMN Home Public Land Mobile Network
HPNA Home Phoneline Networking Alliance
HPOV Hewlitt Packard Open View
HQ Headquarters
HQ High Quality
HSA High Speed Access
HSD High Speed Data
HSDPA High Speed Downlink Packet Access
HSI High-Speed Internet
HSP Headset Profile
HSS Home Subscriber Server
HSS/HLR High Speed Serial/Home Location Register
HSUPA High Speed Uplink Packet Access
HTML HyperText Markup Language
HTPC Home Theatre Personal Computer
HTTP Hypertext Transfer Protocol
HTTPS Hypertext Transfer Protocol Secure (sockets)
HVAC Heating, Ventilation, and Air Conditioning
HVPLS Hierarchical Virtual Private LAN Service
HW Hardware
Hz Hertz
I/O Input/Output
I/Q Incident/Quadrature
IAD Integrated Access Device
IAG Interactive Advertising Guidelines
IAMS Intelligent Asset Management System
IANA Internet Assigned Numbers Authority
IAP Intelligent Access Point
IB In-Band
IBCF Interconnection Border Control Function
ICB Independent Customer Builds
ICC Instant Channel Change
ICE Information and Content Exchange
ICE Interactive Connectivity Establishment
ICE Interchangeable Compressed Elements
ICI Intercarrier Interface
ICMP Internet Control Message Protocol
I-CMTS Integrated Cable Modem Termination System
ICO Incumbent Cable Operator
ICS IMS Convergence Server
i-CSCF Interrogating-Call State/Session Control(ler) Function
ID Identification or Identifier
IDAD Integrated DOCSIS® Access Device
IDE Integrated Development Environment
IDE Integrated Drive (or Device) Electronics
iDEN Integrated Digital Enhanced Network
IDP Intrusion Detection and Prevention
IDS Intrusion Detection System
IDT Integrated Digital Terminal
IEC International Electrotechnical Commission
IEEE Institute of Electrical and Electronic Engineers
IEEE-SA Institute of Electrical and Electronics Engineers Standards Association
IETF Internet Engineering Task Force
IF or I/F Intermediate Frequency
IFC Initial First Cost
IGMP Internet Group Management Protocol
IGMP Internet Group Multicast Protocol
IGMPv2 Internet Group Multicast Protocol, version 2
IGMPv3 Internet Group Multicast Protocol, version 3
IGP Interior Gateway Protocol
IKE Internet Key Exchange
ILEC Incumbent Local Exchange Carrier
ILMI Interim Link Management Interface
IM Instant Message(ing)
IMA Inverse Multiplexing for ATM
Imb Imbalance
IMD Interception Mediation Device
IMD Intermodulation Distortion
Impls Resp Impulse Response
IMS IP Multimedia Subsystem
IMSI International Mobile Subscriber Identity
IM-SSF IP Multimedia Services Switching Function
IN Intelligent Network
INA Interactive Network Adaptor
INADDR ARPA Internet Address Address Routing Parameter Area
I-NET Institutional Network
Int Top Level in Internet Domain Name System
IntServ Integrated Services
IO Input Output
IOS Internetworking Operating System
IP Internet Protocol
IPAT Internet Protocol Access Terminal
IP-CAN Internet Protocol Cellular Access Network
IP-CAN Internet Protocol Connectivity Access Network
IPCDN IP over Cable Data Network
IPDR Internet Protocol Data Record
IPDR Internet Protocol Detail Record
IPDR/SP Internet Protocol Detail Record/Streaming Protocol
IPDT Internet Protocol Digital Terminal
IP-Eth Internet Protocol-Ethernet
IPG Interactive Program Guide
IPG Inter-Packet Gap
IPM Intelligent Policy Management
IPMP Intellectual Property Management and Protection
IPPV Impulse Pay per View
IPR Intellectual Property Rights
IPSec Internet Protocol Security
IPSTB IP Set-Top Box
IPT Internet Protocol Telephony
IPTA Internet Protocol Transport Agreement
IPTV Internet Protocol Television
IPv4 Internet Protocol version 4
IPv6 Internet Protocol version 6
IPX Internetwork Packet Exchange
IR Infrared
IRD Integrated Receiver/Decoder
IRI Industrial Reporting Inc
IRM Intelligent Resource Management
IRR Information Request Response
IRR Internal Rate of Return
IRT Integrated Receiver/Transcoder
IS Information Systems
ISA Integrated Services Architecture
ISA Integrated Services Architecture
ISC Internet Software Consortium
ISCI Industry Standard Coding Identification
iSCSI Internet Small Computer System Interface
ISDN Integrated Services Digital Network
ISI Inter-Symbol Interference
IS-IS Intermediate System-to-Intermediate System
ISM Industrial Scientific Medical
ISMS Integrated Service Management System
ISO International Organization for Standardization
ISP Inside Plant
ISP Internet Service Provider
ISTP Internet Signaling Transport Protocol
ISUP Integrated Services Digital Network User Part
ISV Independent Software Vendor
IT Information Technology
ITA Interactive Television Association
ITIL Information Technology Infrastructure Library
ITU International Telecommunication Union
ITU-T International Telecommunication Union Telecommunication (Standardization Sector)
iTV Interactive Television
IUC Interval Usage Code
IVR Interactive Voice Response
IVRM Intelligent Video Resource Manager
IWF Internetworking Function
IWF InterWorking Function
IXC Interexchange Carrier
IXP Internet Exchange Provider
J2EE Java 2 Enterprise Edition
J2ME Java 2 Mobile Edition
JCP Java Community Process
JMF Java Media Framework
JNI Java Native Interface
JPEG Joint Photographic Experts Group
JSR Java Specification Request
JTA Job Task Analysis
JVM Java Virtual Machine
JVT Java Vision Toolkit
k Kilo = 1000
K12 Kindergarten through Grade 12
KB Kilobyte
kb/s Kilobits per Second
kbps Kilobits per Second
KDC Key Distribution Center
KDCF Korea Digital Cable Forum
kHz Kilohertz
km Kilometer
KPI Key Performance Indicator
KSA Knowledge, Skills and Abilities
ksym/s Kilosymbols Per Second
ksym/sec Kilosymbols Per Second
KTTA Korean Telecommunications Technology Association
kVA 1000 Volt Amperes
kW Kilowatt
l Current
L2 Layer 2
L2TP Layer-2 Tunnel(ing) Protocol
L2TPv3 Layer-2 Tunnel(ing) Protocol Version 3
L2VPN Layer-2 Virtual Private Network
LAN Local Area Network
LATA Local Access and Transport Area
LC Local Convergence
LCAS Link Capacity Adjustment Scheme
LCC Life-Cycle Cost
LCP Local Convergence Point
LCS Line Code Signaling
LCT Local Craft Terminal
LD Long Distance
LDAP Lightweight Directory Access Protocol
LDP Label Distribution Protocol
LDPC Low Density Parity Check
LDP-VPLS Label Distribution Protocol-Virtual Private LAN Service
LDS Local Digital Switch
LEA Law Enforcement Agency
LEC Local Exchange Carrier
LED Light Emitting Diode
LEN Length
LER Label Edge Router
LERG Local Exchange Routing Guide
LFA Long Format Advertising
LH DWDM Long Haul Dense Wave Division Multiplex
LIDF Lawful Intercept Delivery Function
LIU Line Interface Unit
LLC Logical Link Control
LLD Logical Link Identifier
L-LSP Label-Only-Inferred-PSC LSP
LMDS Local Multipoint Distribution System
LMI Link Management Interface
LMP Link Management Protocol
LNB Low Noise Block-downconverter
LNP Local Number Portability
LO Local Origination
LOADM Lightweight Optical Add/Drop Multiplexer
LOF Loss of Frame
LOPS Loss of Packet Sync
LOS Line Of Sight
LOS Loss of Signal
LovSAN a.k.a The Blaster Worm
LP Long Play
LPCM Linear Pulse Code Modulation
LPF Local Policy Function
LQ-MOS Listening Quality Mean Opinion Score
LRU Least Recently Used
LSB Least Significant Byte
LSP Label Switched Path
LSP Layered Service Provider
LSP Legacy Set-top Profile
LSR Label Switch Router
LTE Long Term Evolution
LTS Long Term Storage
LUA Last User Activity
LVI Low Voltage Integrator
LWP Low Water Peak
M/U Modulator/Upconverter
M13 Multiplexer for DS1 to DS3 signals
M3UA MTP-3 User Adaptation
mA Milliamp
MAC Media Access Control
MAC Moves, Adds, Changes
MACD Moves, Adds, Changes, Deletes
MAN Metropolitan Area Network
MAP Main Audio Program
MAP Mobility Application Protocol
MARCOM Marketing & Communications
MAS MPEG-Aware Switch
MB Media Bundle
MB Megabyte
Mb/s Megabits per Second
MB/s Megabytes per Second
Mbaud Megabaud
Mbits/sec Megabits per Second
Mbps Megabits per Second
MBps MegaByte per Second
MBS Mission Bit Stream
M-CMTS Modular Cable Modem Termination System
MCP Mini-Carousel Protocol
MC-PC Media Center Personal Computers
MCPC Multiple Channel Per Carrier (Satellite transmission)
MCTF Motion Compensated Temporal Filtering
MD5 Message-Digest Algorithm
MDA Model Driven Architecture
MDN Mobile Directory Number
MDR Mobile Digital Recorder
MDU Multiple Dwelling Unit
mDVR Multi-TV Digital Video Recorder
MEA Mesh Enabled Architecture
MEF Metro Ethernet Forum
MEMS Micro-Electro-Mechanical Systems
MEN Metro Ethernet Network
MER Modulation Error Ratio
MF Multifield
MF Multifrequency
MFM Multi-Flow Multicast
MG Media Gateway
MGC Media Gateway Controller
MGC Media Gateway Controller
MGCF Media Gateway Control Function
MGCP Media Gateway Control Protocol
MGCP Media Gateway Control Protocol
MGW Media Gateway
MHP Multimedia Home Platform
MHz Megahertz
MIB Management Information Base
MIC Message Integrity Check
MIDI Musical Instrument Digital Interface
MIDP Mobile Information Device Profile
MIMO Multiple Input, Multiple Output
MIMO Multiple Input, Multiple Output
MIP Mobile IP
MIPS Millions of Instructions per Second
MITM Man in the Middle
ML/MP Main Level/Main Profile
MLB Medium-to-Large Business
MLD Multicast Listener Discovery
MLD Multicast Listener Discovery
MLPPP Multi-Link Point to Point Protocol
MM Multimedia
MMA Media Management Agent
MMD Multipoint Microwave Distribution
MMG Massively Multiplayer Game
MMI Man Machine Interface
MMS Multimedia Message System
MNO Mobile Network Operator
MNO Mobile Network Operator
MoCA Multimedia Over Coax Alliance
MOD Movies on Demand
MOF Meta Object Facility
MOS Mean Opinion Score
MOS-CQ Mean Opinion Score-Conversational Quality
MOS-LQ Mean Opinion Score-Listening Quality
MOSPF Multicast Open Shortest Path First
MOSSI MCMTS Operations Support System Interface
MOSSI Modular Open Source Software Institute
MOU Minutes Of Use
MP Media Player
MP@ML Main Profile at Main Level
MP2MP Multipoint to Multipoint
MP3 MPEG (Moving Pictures Expert Group)-1, (Audio) Layer 3
MPBGP MultiProtocol Border Gateway Protocol
MPC Master Planned Communities
MPC Media Player Controller
MPCP Multipoint Control Protocol
MPDU MAC (Media Access Control) Protocol Data Unit
MPEG Moving Pictures Expert Group
MPEG-1 Moving Pictures Expert Group – Layer 1
MPEG-2 Moving Pictures Expert Group – Layer 2
MPEG2-TS MPEG2-Transport Stream
MPEG-4 Moving Pictures Expert Group – Layer 4
MPEG-TS Moving Pictures Expert Group Transport Stream
MPEGTS MPEG Transport Stream
MPLS Multiprotocol Label Switching
MPLS-eth Multiprotocol Label Switching-Ethernet
MPLS-FRR MultiProtocol Label Switching Fast Reroute
MPLS-TE MPLS – Traffic Engineering
MPLS-TE MultiProtocol Label Switching Traffic Engineering
MPT MPEG Transport
MPTS Multi-Program Transport Stream
MQ Medium Quality
M-QAM M-ary Quadrature Amplitude Modulation
MRC Media Resource Center
MRF Multimedia Resource Function
MRFC Multimedia Resource Function Controller
MRFP Multimedia Resource Function Processor
MRTG Multi Router Traffic Grapher
MS Media Servers
ms Millisecond
MS Mobile Station
MSA Metropolitan Statistical Area
MSA300 Standard 10 Gigabit Ethernet Connector
MSB Most Significant Byte
MSC Message Sequence Chart
MSC Mobile Switching Center
MSC Mobile Switching System
MSDP Multicast Source Discovery Protocol
msec Millisecond
MSFT Microsoft Corporation
MSO Multiple System Operator
MSPP Multi-Service Provisioning Platform
Msps Mega-Symbols per Second
MSR Mesh Scalable Routing
MSTP Multi Service Transport Platform
MSTP Multiple Spanning Tree Protocol
Msym Symbol Rate
MTA Multimedia Terminal Adapter
MTBF Mean Time Between Failures
MTP-3 Message Transfer Part Level 3
MTTD Mean Time to Diagnose
MTTF Mean-Time-To-Failure
MTTR Mean Time To Repair
MTTU Mean Time to Understand
MTU Maximum Transmission Unit
MUG Multimedia Home Platform Umbrella Group
MULPI MAC and Upper Layer Protocol Interface
MUX Multiplexer
mV Millivolt
MVNO Mobile Virtual Network Operator
MVoD Mobile Video on Demand
MVPD Multi-channel Video Programming Distributor
MWG Media GateWay
MWR Mesh Wireless Router
MZ Mach-Zehnder
NACK Negative Acknowledgement
NANPA North American Numbering Plan Administration
NAP Network Access Point
NAPT Network Address and Protocol Translation
NAPTR Naming Authority Pointer
NAS Network Attached Storage
NASS Network Attached Storage System
NAT Network Address Translation
NBC-BS Non Backwards-Compatible Broadcast Services
NBI Northbound Interface
NCM Next Century Media
NCS Network-based Call Signaling
NCTA National Cable & Telecommunications Association
ND Neighbor Discovery
NDA Non-Disclosure Agreement
NDE Network Dimensioning Engine
NDMH Non-Degraded Modem Hours
NDVR Network Digital Video Recorder
NE Network Element
NEBS Network Equipment Building System
NeDS Network Domain Selection
NEMA National Electrical Manufactures Association
NEMS Network Element Management System
NETBIOS Network Version of Basic Input/Output System
NF Noise Figure
NFM Narrowband FM
NFS Network File System
NG STB Next Generation Set Top Box
NG Next Generation
NG-L1 Next Generation Layer 1
NGN Next Generation Network
NGNA Next Generation Network Architecture
NGO Non-Government Organization
NGOD Next Generation On Demand
ngOSS Next Generation Operations Systems and Software
ng-SONET Next Generation Synchronous Optical NETwork
NI Network Interface
NIC Network Interface Card
NID Network Interface Device
NIS Network Infrastructure Solutions
NIST National Institute of Standards and Technology
NIT Network Information Table
NIU Network Interface Unit
NLOS Non-Line of Sight
NLS Network Layer Signaling
nm Nanometer
NmAccess Network Management Access
NMC Network Media Center
NMS Network Management System
NNI Network-Network Interface
NNOC National Network Operations Center
NNTP Network News Transfer Protocol
NOC Network Operations Center
NP Number Portability
NPAC Number Portability Administration Center
n-PE Network (Device) Provider Edge
NPR Noise Power Ratio
NPV Net Present Value
nPVR Network-based Personal Video Recorder
nQAM Unspecified QAM
NRSS National Renewable Security Standard
NRT VBR Non-Real Time Variable Bit Rate
NRTC National Rural Telecommunications Cooperative
nRTP Non Real-time Transport Protocol
nrtPS Non-Real Time Polling Service
NRT-VR Non Real Time-Variable Rate
NRZ NonReturn to Zero
ns Nanosecond
NS Neighbor Solicitation
NSI Network Side Interface
NSIS Next Steps in Signaling
NSP Network Service Provider
NTP Network Time Protocol
NTS Near Term Storage
NTSC National Television System Committee
NVM Non-Volatile Memory
NVOD Near Video on Demand
NW Network
O/E Optical Signal-to-Electrical Signal conversion
OA&M Operations, Administration & Maintenance
OADM Optical Add/Drop Multiplexer
OAM Operations, Administration, Management
OAM&P Operations, Administration, Maintenance and Provisioning
OASIS Organization for the Advancement of Structured Information Standards
OCAP OpenCable™ Application Platform
OC-CC OpenCable™ CableCARD™
OC-CFR OpenCable™ – Core Functional Requirements
OCn Optical Carrier (level)
OCn Optical Carrier (level)
OCS Online Charging System
OCSP Online Certificate Status Protocol
OCST Office of Cable Signal Theft
OC-x Optical Carrier (level)
OCXO Oven Controlled Crystal Oscillator
ODA Outlet Digital Adapter
ODRL Open Digital Rights Language
ODU Optical Data Unit
ODU-1 Optical Data Unit – Level 1
OE Optical Ethernet
O-E Optical-Electrical
OEM Original Equipment Manufacturer
O-E-O Optical-to-Electrical-to-Optical
OEPL Optical Ethernet Private Line
OEPLAN Optical Ethernet Private Local Area Network
OEVPL Optical Ethernet Virtual Private Line
OEVPLAN Optical Ethernet Virtual Private Local Area Network
OFC Optical Fiber Communication
OFCS Offline Charging System
OFDM Orthogonal Frequency Division Multiplexing
OFDMA Orthogonal Frequency Division Multiple Access
OH Overhead
OIU Organizationally Unique Identifier
OJT On-The-Job Training
OLA Optical Line Amplifier
OLT Optical Line Terminal (or Termination)
OM Order Management
OMA Open Mobile Alliance
OMG Object Management Group
ONDS Optical Node Distribution Switch
ONT Optical Network Terminal
ONU Optical Network Unit
OOB Out-of-Band
OOF Out of Frame
OOK On-Off-Keying
OOM Order Of Magnitude
OOO Optical-Optical-Optical
OpEx Operating Expenses
OPVC1 Optical channel Payload Virtual Container-Level 1
ORX Optical Receiver
OS Operating System
OSA SCS Open Service Access-Service Capability Server
OSA Open Service Access
OSC Optical Supervisory Channel
OSCT Operational Service Communications Tool
OSDE Open Service Delivery Environment
OSGi Open Services Gateway Initiative
OSI Open Systems Interconnect
OSMINE Operations Systems Modification for the Integration of Network Elements
OSNR Optical Signal-to-Noise Ratio
OSP Outside Plant
OSPF Open Shortest Path First
OSPF-TE Open Shortest Path First with Traffic Engineering
OSS Operation Support System
OSSI Operational Support System Interface
OSW Optical SWitch
OTA Over-the-Air
OTDR Optical Time Domain Reflectometer
OTN Optical Transition Node
OTN Optical Transport Network
OTTP Over-The-Top Provider
OTU2 Optical Transport Channel Unit 2
OTU-N Optical Transport Unit
OTX Optical Transmitter
OUI Organizationally Unique Identifier
OWG OnRamp Working Group
OXC Optical Cross Connect
P/E Profits to Earnings
P2MP Point to Multipoint
P2P LSP Peer-to-Peer Layered Service Provider
P2P Peer to Peer
P2P Point to Point
PAC Personal Air Communication technology protocol
P2PE Point-to-Point Emulation
PABX Private Automatic Branch Exchange
PAC Personalized Adaptive Coding
PAC Provisioning, Activation and Configuration
PACM Provisioning, Activation, Configuration and Management
PAM PacketCable Application Manager
PAM Pulse Amplitude Modulation
PAMS Passive Acoustic Monitoring System
PAMS Perceptive Analysis Measurement System
PAN Personal Area Network
PAR Project Authorization Request
PARM Parameter
PAT Port Address Termination
PAT Program Association Table
PBBTE Provider Backbone Bridging with Traffic Engineering
PBH Peak Busy Hour
PBIA Personal Broadband Industry Association
PBM Program Based Mosaic
PBNM Policy-Based Network Management
PBP Personal Basis Profile
PBR Policy Based Routing
PBT Provider Backbone Transport
PBX Private Branch Exchange
PC PacketCable™
PC Personal Computer
PC1 Packet Cable version1
PC2.0 PacketCable™ 2.0
PCI Peripheral Connect Interface
PCM Pulse Code Modulation
PCMCIA Personal Computer Memory Card Interface Adaptor
PCMCIA Personal Computer Memory Card International Association
PCMM PacketCable™ Multimedia
PCR Peak Cell Rate
PCR Program Clock Reference
PCRF Policy and Charging Rules Function
PCS Personal Communications System
P-CSCF Proxy-Call Session Control(ler) Function
PDA Personal Digital Assistant
PDD Post-dial Delay
PDF Policy Decision Function
PDF Policy Distribution Function
PDF Probability Density Function
PDG Packet Data Gateway
PDH Plesiochronous Digital Hierarchy
PDI Path Defect Indicator
PDL Polarization Dependent Loss
PDN Public Data Network
PDP Packet Data Protocol
PDP Policy Decision Point
PDSN Packet Data Serving Node
PDU Protocol Data Unit
PDW Polarization Dependent Wavelength
PEF Policy Enforcement Function
PEG Pain per Eyeball Gained
PEG Public, Education, Government
PEI Policy Enforcement Interface
PEP Policy Enforcement Point
PER Packet Error Rate
PESQ Perceptual Evaluation of Speech Quality
PF Policy Function
PHB Prescribed per Hop Behavior
PHS Packet Header Suppression
PHS Payload Header Suppression
PHY Physical (layer)
PIC Photonic Integrated Circuit
PID Packet Identifier
PID Program Identifier
PIM Protocol Independent Multicast
PIM-DM Protocol Independent Multicast-Dense Mode
PIM-SM Protocol Independent Multicast – Sparse Mode
PIN Positive-Intrinsic-Negative
PIN Personal Identification Number
PING Packet Internet Groper
PIP Picture In Picture
PKI Public Key Infrastructure
PKM Privacy and Key Management
PKT Packet
pktc PacKeT Cable
PL Packet Loss
PLC Packet Loss Concealment
PLC Powerline Communications
PLMN Public Land Mobile Network
PLT Powerline Telecommunications
PM Performance Monitoring
PM Phase Modulation
PMD Polarization Mode Dispersion
PMK Pairwise Master Key
PMP Point to MultiPoint
PMP Portable Media Player
PMT Program Map Table
PN Program Number
PO Purchase Order
PoC Push to talk over Cellular
POD Point of Deployment
POF Plastic Optical Fiber
POH Path Overhead
PON Passive Optical Network
PON Passive Optical Network
POP Point Of Presence
POP3 Post Office Protocol 3
POS Packet Over SONET
POS Point of Sale
POTS Plain Old Telephone Service
p-p Peak to peak
PPD Post-pickup Delay
PPE Programmable Processing Element(s)
PPmux Point-to-Point Multiplexer
PPP Point-to-Point Protocol
PPPoA PPP over ATM
PPPoE Point-to-Point Protocol over Ethernet
pps packets per second
PPS Packets Per Second
PPT Power Passing Tap
PPTP Point-to-Point Tunneling Protocol
PPV Pay Per View
PQ Picture Quality
PRBS Pseudo-Random Binary Sequence
PRBS Pseudo-Random Bits Stream
PRCF Positioning Radio Coordination Function
PRI Primary Rate Interface
PRM Polarization Recovery Module
PRNG Pseudo Random Number Generators
PRV Privacy
PS Packet Switch
PS Policy Server
PS Portal Services
PS Power Supply
PS Provisioning Server
PSA PacketCable Service Agreement
PS-CN Packet Switched Core Network
PSD Power Spectral Density
PSI Program Specific Information
PSIP Program and System Information Protocol
PSK Phase Shift Keying
PSK PreShared Key
PSN Packet Switched Network
PSP Packet Streaming Protocol
PSP Packet Success Probability
PSP Play Station Portable
PSQ Packet Streaming Queue
PSQM Perceptual Speech Quality Measurement
PSTN Public Switched Telephone Network
Pt to Pt Point to Point
PTK Pairwise Temporal Key
PTP Point To Point
PTS Program Transport Stream
PTT Postal, Telegraph and Telephone
PTT Push to Talk
PTV PowerTV
PUSC Partial Usage of Subchannels
PV Present Value
PVC Permanent Virtual Circuit/Connection
PVC Private Virtual Circuit
PVR Personal Video Recorder
PVT Provider VLAN Transport
PW Pseudo Wire
PWE3 Pseudowire Emulation Edge-to-Edge
PWE3 Pseudo-Wire End-to-End Working Group
Q1 Quarter 1
QA Quality Assurance
QAM Quadrature Amplitude Modulation
QBP QoS Boundary Point
QCC QoS Characteristics Management Client
QCIF Quarter Common Intermediate Format
QCS QoS Characteristics Management Server
QEF Quasi-Error Free
QFM QoS prioritized Forwarding and Media Access
QoE Quality of Experience
QoS Quality of Service
QPSK Quadrature Phase Shift Keying
R&D Research and Development
R.H. Relative Humidity
RA Router Advertisement
RACF Resource Access Control Function
RACS Resource and Admission Control Sub-system
RADD Remote Addressable DANIS/DLS
RADIUS Remote Authentication Dial-in User Service
RAI Remote Alarm Indication
RAID Redundant Array of Inexpensive Disks
RAM Random Access Memory
RAN Radio Access Network
RAN Regional Area Network
RAP Regional Access Point
RAP Resource Allocation Protocol
RBOC Regional Bell Operating Company
RBW Resolution Bandwidth
RC Redistribution Control
RCA Root Cause Analysis
RCEF Resource Control and Enforcement Function
RCV Receiver
RDC Reverse Data Channel
RDF Resource Description Framework
RDI Remote Defect Indicator
RDI Remote Detection Indication
REL Rights Expression Language
REN Ringer Equivalence Number
REQ Request
ResApp Resident Application
RESV Reservation
REW Rewind
RF Radio Frequency
RFC Request for Comment
RFI Request for Information
RFP Request for Proposal
RG Residential Gateway
RIAA Recording Industry Association of America
RIN Relative Intensity Noise
RIP Routing Information Protocol
RISC Reduced Instruction Set Computer
RJ Registered Jack
RKS Record Keeping Server
RM Resource Manager
RMS Root Mean Square
RNC Radio Network Controller
RNOC Regional Network Operations Center
RO Read Only
ROADM Reconfigurable Optical Add/Drop Multiplexer
ROAP Rights Object Acquisition Protocol
ROB Return on Bandwidth
ROI Return on Investment
ROM Read Only Memory
RP Rendezvous Point
RPD Return Path Demodulator
RPF Reverse Path Forwarding
RPM Revolutions per Minute
RPR Resilient Packet Ring
RS Reed-Solomon
RS Router Solicitation
RSA Reed-Solomon Association
RSA Rivest Shamir Adleman
RSS Rich Site Summary or Really Simple Syndication
RSTP Rapid Spanning Tree Protocol
RSVP Resource reSerVation Protocol
RSVP-TE Resource Reservation Protocol with Traffic Engineering
RT VBR Real-Time Variable Bit Rate
RT Real Time
RTA Real Time Acquisition
RTA Real Time Asset
RTCP Real time Transmission Control Protocol
RTCP-XR Real time Transmission Control Protocol-Extended Reports
RTD Round Trip Delay
RTE Real Time Encoder
RTI Real Time Ingest
RTN Regional Transport Network
RTOS Real Time Operating System
RTP Real Time Protocol
RTP Real-time Transport Protocol
RTPS Real Time Polling Service
rtPS Real Time Polling Service
RTSP Real Time Streaming Protocol
RTT Round-Trip Time
RT-VR Real Time-Variable Rate
RU Rack Unit
RU Revenue Unit
RW Rewind
RX Receive or receiver
RxMER Receive Modulation Error Ratio
RZ Return to Zero
RZ-DPSK Return to Zero Differential Phase Shift keying
s.f. Square Foot
S/I Signal-to-Interference Ratio
S/IMP Signal-to-Impulse Ratio
S/N Signal-to-Noise Ratio
SA Scientific Atlanta
SAG Synthetic Analog Gateway
SAID Security Association Identifier
SAII Source Attachment Individual Identifier
SAML Security Assertion Markup Language
SAN Storage Area Network
SAP Secondary Audio Program
SAP Service Access Point
SARA Scientific-Atlanta Resident Application
SATA Serial Advanced Technology Attachment
SAToP Structured Agnostic TDM over Packet
SAW Surface Acoustic Wave
SB Switched Broadcast
SBC Session Border Control(ler)
SBC Switched Broadcast Client
SBM Switched Broadcast Manager
SBS Stimulated Brilliouin Scattering
SBS Switched Broadcast Server
SBV Switched Broadcast Video
SBW Signal Bandwidth
SC/APC Standard Connector/ Angled Physical Contact
SCADA Supervisory Control And Data Acquisition
SCC Seamless Content Consumption
S-CDMA Synchronous Code Division Multiple Access
SCIM Service Capability Interaction Manager
SCM Stored Content Manager
SCM Sub-Carrier Multiplexing
SCMS Serial Copy Management System
SCN Service Class Name
SCN Shared Content Network
SCO Synchronous Connection Oriented
SCP Service Control Platform
SCR Silicon Controlled Rectifier
SCS Service Capability Server
s-CSCF Serving-Call Session Control Function
SCSI Small Computer System Interface
SCTE Society of Cable Telecommunications Engineers
SD Secure Digital
SD Standard Definition
SDB Switched Digital Broadcast
SDC Service Data Center
SDF Service Degradation Failure
SDH Synchronous Digital Hierarchy
SDI Secure Digital Interface
SDIO Secure Digital Input/Output
SDK Software Development Kit
SDL Simple DirectMedia Layer
SDMH Severely Degraded Modem Hours
SDMI Secure Digital Music Initiative
SDP Service Delivery Platform
SDP Session Description Protocol
SDPF Service Policy Decision Function
SDRAM Synchronous Direct Random Access Memory
SDRF Software Defined Radio Forum
SDTV Standard Definition Television
SDV Switched Digital Video
SDVoD Standard Definition Video on Demand
SDVOD Standard Definition Video-on-Demand
SEM Subscriber Experience Management
SER Symbol Error Rate
SERDES Serializer/Deserializer
SES Severely Errored Seconds
SESR Severely Errored Seconds Ratio
SF Service Flow
SF SuperFrame
SFA Service Flow Authorization
SFID Service Flow Identifier
SFM Service Flow Management
SFM Single-Flow Multicast
SFM Source Filtered Multicast
SFP Small Form-factor Pluggable
SFP Small Form-factor Pluggable
SG Service Group
SG Signaling Gateway
SGC Signaling Gateway Controller
SGSN Serving GPRS Support Node
SGW Security GateWay
SGW Signaling Gateway
SHA-1 Secure Hash Algorithm version 1
SHDB Switched High-Definition Digital Broadcast
SI Service Information
SI System Information
SIC Standard Industrial Classification
SID Service Identifier
SID Shared Information/Data
SIFS Shortest InterFrame Space
SIGTRAN Signal Transmission
SIM Subscriber Identity Module
SIP Session Initiation Protocol
SISO Single-Input Single-Output
SLA Service Level Agreement
LC Shorten Last Codeword
SLF Subscription Location Function
SLIC Subscriber Line Interface Card
SLM Signal Level Meter
SM Single Mode
SMB Server Message Block
SMB Small to Medium Business
SME Small to Medium Enterprise
SMF Single Mode Fiber
SMPTE Society of Motion Picture and Television Engineers
SMS Service Management System
SMS Short Message Service (or System)
SMSC Short Message Service Center
S-MTA Standalone Multimedia Terminal Adaptor
SMTP Simple Mail Transfer Protocol
SMx Segment Manager X
SNA Systems Network Architecture
SNC Sub-Network Connection
SNG Satellite News Gathering
SNI Service-to-Network Interface
SNMP Simple Network Management Protocol
SNR Signal-to-Noise Ratio
SOA Semiconductor Optical Amplifier
SOA Service Oriented Architecture
SOAP Simple Object Access Protocol
SoC Systems on a Chip
S-OFDM Scalable Orthogonal Frequency Division Multiplexing
SOH State of Health
SOHO Small Office/Home Office
SONET Synchronous Optical Network
SP Service Provider
SP Single Program
SPAN Services & Protocols for Advanced Networks
S-PDF Service-based – Policy Decision Function
SPDF Synchronous Piggybacked Data Flow
SPDIF Sony/Philips Digital Interface
SPE Synchronous Payload Envelope
Spec. Specification
SPI Spending Potential Indexes
SPIT SPAM over IP Telephony
SPM Self phase modulation
SPP Serial Port Profile
SPR Subscription Profile Repository
SPTS Single Program Transport Stream
SQL Structured Query Language
SQM Sustainable Quality Management
SR Switch Router
RM Session and Resource Manager
SRM Session Resource Manager
SRM System Resource Manager
SRP SIP Routing Proxy
SRS Stimulated Raman Scattering
SRTP Secure Real-time Transport Protocol
SRV Server
SS7 Signaling System 7
SSB Single Sideband
SSD Solid State Disk
SSF Services Switching Function
SSH Secure Shell
SSID Service Set Identifier
SSL Secure Sockets Layer
SSM Source Specific Multicast
SSMF Standard Single Mode Fiber
SSO Single Sign On
SSP Session Setup Protocol
SSP/SIS Shell Session Protocol / Session Initiation System
StatMux Statistical Multiplexing
STB Set-Top Box
Std Standard
STG Subscriber Telephony Gateway
STL Studio-to-Transmitter Link
STM Synchronous Transfer Mode
STM Synchronous Transport Module
STP Spanning Tree Protocol
STS Synchronous Transport Signal
STS-1 Synchronous Transport Signal – Level 1
STT Set-top Terminal
STTD Space Time Transmit Diversity
STUN Simple Transversal of UDP (User Datagram Protocol) Through NAT (Network
Address Translation)
SU Subscriber Unit
SUT System Under Test
SVG Scalable Vector Graphics
SVOD Subscription Video on Demand
SVOD Switched Video on Demand
SVP Secure Video Processor
SW Software
SWB Switched Broadcast
SX Short Reach as in 1000Base-SX
SYNC Synchronization Profile
SYSLOG System Log
T&B Traffic & Billing
T1 First level T-Carrier 1 (1.544Mbps Transmission facility)
T3 Third level T-Carrier 3 (44.736Mbps Transmission facility)
TAC Technical Assistance Center
TAII Target Attachment Individual Identifier
TB Terabyte
TBD To Be Determined
Tbps Terabits per Second
TC Transmission Convergence
TCAP Transaction Capabilities Application Part
TCM Tandem Connection Monitoring
TCM Trellis Coded Modulation
TCO Total Cost of Ownership
TCP Transmission Control Protocol
TCP/IP Transmission Control Protocol/Internet Protocol
TCXO Temperature Controlled Crystal Oscillator
TD-CDMA Time Division-Code Division Multiple Access
TDD Telecommunication Devices for the Deaf
TDD Time Division Duplex
TDM Time Division Multiplexing
TDMA Time Division Multiple Access
TDMoDOCSIS Time Division Multiplexing over DOCSIS
TDMoIP Time Division Multiplexing over Internet Protocol
TD-SCDMA Time Division-Synchronous Code Division Multiple Access
TE Traffic Engineering
TEC Triggered Event Command
TELR Talker Echo Loudness Rating
TFF Thin Film Filter
TFTP Trivial File Transfer Protocol
TG Task Group
TGCP Trunking Gateway Control Protocol
TGS Ticket Granting Server
THz Terahertz
TIA Telecommunication Industry Association
TIA TransImpedance Amplifier
TIPHON Telecommunications & Internet Protocol Harmonization Over Networks
TISPAN Telecom & Internet Services & Protocols for Advanced Networks
TKIP Temporal Key Integrity Protocol
TL1 Transaction Language One
TLS Transparent LAN Service
TLS Transport Layer Security
TLV Type, Length, Value
TMPLS Transport MPLS
TN Telephone Number, Timeslot Number, Telecommunications Network, Transit Node
TNCS Transmission Network Control System
TOADM Tunable Optical Add/Drop Multiplexer
TOD Television on Demand
ToD Time of Day
ToF Time of Flight
TOS Theft of Service
TOS Type of Service
TPL TDM Private Line
TR Technical Reference
TRCF Transport Resource Control Function
TrGW Translation Gateway
TRI Telephony Return Interface
TRP Target Rating Points
tRTO TCP Retransmit Timeout
TS Transport Stream
TSI Time Slot Interchange
TSID Transport Stream Identifier
TSP TDM Service Processor
T-SPEC Traffic SPECification
TSR Technical Service Representative
TSS Telephony Switching Sub-System
TTL Time To Live
TTLS Tunnel Transparent Layer Security
TTY TeleTYpe
TURN Traversal Using Relay NAT (Network Address Translation)
TV Television
TVOD Television on Demand
TWAMP Two-Way Active Measurement Protocol
TWC Time Warner Cable
TX Transmit or transmitter
TxMER Transmit Modulation Error Ratio
TXOP Transmission Opportunity
U/S Upstream
UA User Agent
U-ASPD Unscheduled – Automatic Power Save Delivery
UBR Unspecified Bit Rate
UCC Upstream Channel Change
UCD Upstream Channel Descriptor
UCID Upstream Channel Identifier
UDDI Universal Description, Discovery and Integration
UDLR Uni-Directional Link Routing
UDP User Datagram Protocol
UDP/IP User Datagram Protocol/Internet Protocol
UDSL Unidirectional Digital Subscriber Line
UDWDM Ultra Dense Wave Division Multiplex
UE User Equipment
UEQ Universal Edge QAM
UGC User Generated Content
UGS Unsolicited Grant Service
UGS/AD UGS with Activity Detection
UHF Ultra High Frequency
UI User Interface
UKL Unit Key List
UL Uplink
UMA Unlicensed Mobile Access
UML Unified Modeling Language
UMTS Universal Mobile Telecommunications System
UNC UMA (Unlicensed Mobile Access) Network Controller
UNE Unbundled Network Element
UNE-P Unbundled Network Element – Platform
UNI User Network Interface
UNI-C User Network Interface – Customer (Network)
UNI-CE User Network Interface – Customer Edge
U-NII Unlicensed National Information Infrastructure
UNI-N User Network Interface – (Provider) Network
UPA Usability Professionals’ Association
uPE User (Device) Provider Edge
UPnP Universal Plug and Play
UPS Uninterruptible Power Supply
URI Uniform Resource Identifier
URL Uniform Resource Locator
US Upstream
USB Universal Serial Bus
USD United States Dollar(s)
USF Universal Service Fund
USM User-based Security Model
USRM Universal Session Resource Management
UTI Universal Transport Interface
UTP Unshielded Twisted Pair
UTRAN UMTS Terrestrial Radio Access Network
UWB Ultra Wideband
V Voltage
V/A Video/Audio
VAC Volts Alternating Current
VAD Voice Activity Detection
VAG Voice Access Gateway
VAR Value Added Reseller
VAS Value Added Service
VBI Vertical Blanking Interval
VBR Variable Bit Rate
VBR Variable Bit Rate
VBR-NRT Variable Bit Rate – Non-Real Time
VBR-RT Variable Bit Rate – Real Time
VC Virtual Channel, Virtual Circuit
VC1 Video Codec 1
VC-1 Video Coding 1 (Formerly VC-9–Soon to be known as SMPTE 421M)
VC-1 Video Compression 1 (Formerly VC-9–Soon to be known as SMPTE 421M)
VCAT Virtual Concatenation
VCC Voice Call Continuity
VCC Voice Call Continuity
VCI Virtual Channel Identifier
VCM Variable Coding and Modulation
Vco Voltage Cut Off
VCR Video Cassette Recorder
VDC Volts Direct Current
VDSL Very High-bit-rate Digital Subscriber Line
VDSL2 Very High-bit-rate Digital Subscriber Line 2
VER Virtual Ethernet Ring
VHF Very High Frequency
VHS Video Home System
VL2SI Virtual LAN to Serial Interface
VLAN Virtual Local Area Network
VLL Virtual Leased Line
VLR Visitor Location Register
VLSM Variable Length Subnet Mask
VM Virtual Machine
VMM Vehicular Modem Module
VN Voltage Null
VoD Video on Demand
VODoIP Video on Demand over Internet Protocol
VoDSL Video over Digital Subscriber Line
VoIP Voice over Internet Protocol
VoWi-Fi Voice over Wi-Fi
VP Voltage Peak
V-PCRF Visited Policy and Charging Rules Function
VPI Virtual Path Identifier
VPL Virtual Private Line
VPLS Virtual Private Label Service
VPLS Virtual Private LAN Service
VPN Virtual Private Network
VPWS Virtual Private Wire Service
VQ Vector Quantization
VQI Voice Quality Index
VRAM Video Random Access Memory
VRF Virtual Routing and Forwarding Tables
VRN Video-Rich Navigation
VRNAV Video-Rich Navigation Audio/Visual
VRTX Virtual Real-Time Extension
VS Video Server
VSA Vector Signal Analyzer
VSAT Very Small Aperture Terminal
VSB Vestigial Sideband
VSG Vector Signal Generator
VSI Virtual Switch Interface
VT Virtual Tributary
VTS Video Transport Service
W Watt
WAG Wireless Access Gateway
WAN Wide Area Network
WAP Wireless Access Point
WAV Windows Wave
WCD Wideband Channel Descriptor
WCDMA Wireless Code Division Multiple Access
WCM Wideband Cable Modem
WCMTS Wideband Cable Modem Termination System
WDM Wave Division Multiplex(ing)
WECA Wireless Ethernet Compatibility Alliance
WEP Wired Equivalent Privacy
WFA Workforce Automation
WFM Wideband FM
WFM Workforce Management
WFQ Weighted Fair Queuing
-Fi Wireless Fidelity
WiMAX Wireless Microwave Access
WiMax Worldwide Interoperability for Microwave Access
WiMedia An alliance for Wireless Multimedia
WIN Wireless Intelligent Network
WIP Work in Process
WIWWIW “What I Want When I Want”
WLAN Wireless Local Area Network
WLL Wireless Local Loop
WM Wave Mixing
WM Wave Multiplexing
WM9 Windows Media Player, version 9
WMA Windows Media Audio
WMAN Wireless Metropolitan Area Network
WMC Wireless Modem Card
WME Wireless Multimedia Extension
WMM Wi-Fi MultiMedia
WMM-SA Wi-Fi MultiMedia Standards Association/Alliance
WMV Windows Media Video
WOFDM Wavelet Orthogonal Frequency Division Multiplexing
WPA Wireless (Wi-Fi) Protected Access
WPA2 Wireless (Wi-Fi) Protected Access 2
WPA-FSK Wireless (Wi-Fi) Protected Access with Pre-Shared Key
WPAN Wireless Personal Area Network
WPE Wireless Plant Extension
WRED Weighted Random Early Detection
WSDL Web Services Definition Language
WSDL Web Services Description Language
WSS Wavelength Selective Switch
WW Worldwide
WWDM Wide WDM
WWRF Wireless World Research Forum
WWW World Wide Web
XAIT Extended Application Information Table
XAUI 10 Gigabit Ethernet Attachment Unit Interface
xDSL Any variant of the Digital Subscriber Line technology
XENPAK Fiber Optic Transceiver Module conforming to 10GigE Standard
XFP 10-Gigabit Small Form-factor Pluggable GBIC Module
XHTML Extensible Hypertext Markup Language
XMI XML Metadata Interchange
XML Extensible Markup Language
XMOD Cross Modulation
xOD X-service on Demand (i.e., Movies on Demand)
XPM Cross-Phase Modulation
xPON X version of Passive Optical Network
xVOD X version (or form) of Video on Demand (i.e., Subscription, Near, etc.)
xWDM Non-specific form of Wave Division Multiplex
y/y Year Over Year
ZWP Zero Water Peak
ZWPF Zero Water Peak Fiber
2nd Part

https://industrialcalculation.files.wordpress.com/2014/08/59781_140106106152199_1956938532_n.jpg

A
AAT—Average Access Time
AA—Anti-Aliasing
AAA—Authentication Authorization, Accounting
AABB—Axis Aligned Bounding Box
AAC—Advanced Audio Coding
AAL—ATM Adaptation Layer
AALC—ATM Adaptation Layer Connection
AARP—AppleTalk Address Resolution Protocol
ABCL—Actor-Based Concurrent Language
ABI—Application Binary Interface
ABM—Asynchronous Balanced Mode
ABR—Area Border Router
ABR—Auto Baud-Rate detection
ABR—Available Bitrate
ABR—Average Bitrate
AC—Acoustic Coupler
AC—Alternating Current
ACD—Automatic Call Distributor
ACE—Advanced Computing Environment
ACF NCP—Advanced Communications Function—Network Control Program

ACID—Atomicity Consistency Isolation Durability
ACK—ACKnowledgement
ACK—Amsterdam Compiler Kit
ACL—Access Control List
ACL—Active Current Loop
ACM—Association for Computing Machinery
ACME—Automated Classification of Medical Entities
ACP—Airline Control Program
ACPI—Advanced Configuration and Power Interface
ACR—Allowed Cell Rate
ACR—Attenuation to Crosstalk Ratio
AD—Active Directory
AD—Administrative Domain2
ADC—Analog-to-Digital Converter
ADC—Apple Display Connector
ADB—Apple Desktop Bus
ADCCP—Advanced Data Communications Control Procedures
ADO—ActiveX Data Objects
ADSL—Asymmetric Digital Subscriber Line
ADT—Abstract Data Type
AE—Adaptive Equalizer
AES—Advanced Encryption Standard
AF—Anisotropic Filtering
AFP—Apple Filing Protocol
AGP—Accelerated Graphics Port
AH—Active Hub
AI—Artificial Intelligence
AIX—Advanced Interactive eXecutive
Ajax—Asynchronous JavaScript and XML
AL—Active Link
AL—Access List
ALAC—Apple Lossless Audio Codec
ALGOL—Algorithmic Language
ALSA—Advanced Linux Sound Architecture
ALU—Arithmetic and Logical Unit
AM—Active Matrix
AM—Access Method
AM—Active Monitor
AM—Allied Mastercomputer
AM—Amplitude Modulation
AMD—Advanced Micro Devices
AMQP—Advanced Message Queuing Protocol
AMR—Audio Modem Riser
ANN—Artificial Neural Network
ANSI—American National Standards Institute
ANT—Another Neat Tool
AoE—ATA over Ethernet
AOP—Aspect-Oriented Programming
APCI—Application-Layer Protocol Control Information3
API—Application Programming Interface
APIC—Advanced Programmable Interrupt Controller
APIPA—Automatic Private IP Addressing
APL—A Programming Language
APR—Apache Portable Runtime
ARC—Adaptive Replacement Cache
ARC—Advanced RISC Computing
ARIN—American Registry for Internet Numbers
ARM—Advanced RISC Machines
AROS—AROS Research Operating System
ARP—Address Resolution Protocol
ARPA—Address and Routing Parameter Area
ARPA—Advanced Research Projects Agency
ARPANET—Advanced Research Projects Agency Network
AS—Access Server
ASCII—American Standard Code for Information Interchange
ASG—Abstract Semantic Graph
ASIC—Application-Specific Integrated Circuit
ASIMO–Advanced Step in Innovative Mobility
ASLR–Address Space Layout Randomization
ASM—Algorithmic State Machine
ASMP—Asymmetric Multiprocessing
1—Abstract Syntax Notation 1
ASP—Active Server Pages
ASP—Application Service Provider
ASR—Asynchronous Signal Routine
AST—Abstract Syntax Tree
ASSP—Application-Specific Standard Product
AT—Advanced Technology
AT—Access Time
AT—Active Terminator
ATA—Advanced Technology Attachment
ATAG—Authoring Tool Accessibility Guidelines
ATAPI—Advanced Technology Attachment Packet Interface
ATM—Asynchronous Transfer Mode
AVC—Advanced Video Coding
4
AVI—Audio Video Interleaved
AWK—Aho Weinberger Kernighan
AWT—Abstract Window Toolkit

B
B2B—Business-to-Business
B2C—Business-to-Consumer
BAL—Basic Assembly Language
Bash—Bourne-again shell
BASIC—Beginner’s All-Purpose Symbolic Instruction Code
BBP—Baseband Processor
BBS—Bulletin Board System
BCD—Binary Coded Decimal
BCNF—Boyce–Codd normal form
BEEP—Blocks Extensible Exchange Protocol
BER—Bit Error Rate
BFD—Bidirectional Forwarding Detection
BFD—Binary File Descriptor
BFS—Breadth-First Search
BFT—Byzantine Fault Tolerant
BGP—Border Gateway Protocol
BiDi—Bi-Directional
bin—binary
BINAC—Binary Automatic Computer
BIND—Berkeley Internet Name Domain
BIOS—Basic Input Output System
BJT—Bipolar Junction Transistor
bit—binary digit
Blob—Binary large object
Blog—Web Log
BMP—Basic Multilingual Plane
BNC—Bayonet Neill-Concelman
BOINC—Berkeley Open Infrastructure for Network Computing
BOM—Byte Order Mark
BOOTP—Bootstrap Protocol5
BPDU—Bridge Protocol Data Unit
BPEL—Business Process Execution Language
BPL—Broadband over Power Lines
bps—bits per second
BRR—Business Readiness Rating
BSA—Business Software Alliance
BSB—Backside Bus
BSD—Berkeley Software Distribution
BSoD—Blue Screen of Death
BSS—Block Started by Symbol
BT—BitTorrent
BT—Bluetooth
BTAM—Basic Telecommunications Access Method
BW—Bandwidth
BYOD—Bring Your Own Device

C
CA—Certificate Authority
CAD—Computer-Aided Design
CAE—Computer-Aided Engineering
CAID—Computer-Aided Industrial Design
CAI—Computer-Aided Instruction
CAM—Computer-Aided Manufacturing
CAPTCHA—Completely Automated Public Turing Test to tell Computers and Humans Apart

CAT – Computer-Aided Translation
CAQ—Computer-Aided Quality Assurance
CASE—Computer-Aided Software Engineering
cc—C Compiler
CD—Compact Disc
CDE—Common Desktop Environment
CDMA—Code Division Multiple Access
CDN—Content Delivery Network
CDP—Continuous Data Protection
CD-R—CD-Recordable6
CD-ROM—CD Read-Only Memory
CD-RW—CD-Rewritable
CDSA—Common Data Security Architecture
CERT—Computer Emergency Response Team
CES—Consumer Electronics Show
CF—Compact Flash
CFD—Computational Fluid Dynamics
CFG—Context-Free Grammar
CFG—Control Flow Graph
CG—Computer Graphics
CGA—Color Graphics Array
CGI—Common Gateway Interface
CGI—Computer-Generated Imagery
CGT—Computational Graph Theory
CHAP—Challenge-Handshake Authentication Protocol
CHS—Cylinder-Head-Sector
CIDR—Classless Inter-Domain Routing
CIFS—Common Internet Filesystem
CIM—Common Information Model
CISC—Complex Instruction Set Computer
CJK—Chinese, Japanese, and Korean
CJKV—Chinese, Japanese, Korean, and Vietnamese
CLI—Command Line Interface
CLR—Common Language Runtime
CM—Configuration Management
CM—Content Management
CMMI—Capability Maturity Model Integration
CMOS—Complementary Metal-Oxide Semiconductor
CMS—Content Management System
CN—Canonical Name
CN—Common Name
CNC—Computer Numerical Control
CNR—Communications and Networking Riser
COBOL—Common Business-Oriented Language
COM—Component Object Model
CORBA—Common Object Request Broker Architecture7
COTS—Commercial Off-The-Shelf
CPA—Cell Processor Architecture
CPA—Converged Packet Access
CPAN—Comprehensive Perl Archive Network
CP/M—Control Program/Monitor
CPRI—Common Public Radio Interface
CPS—characters per second
CPU—Central Processing Unit
CR—Carriage Return
CRAN—Comprehensive R Archive Network
CRC—Cyclic Redundancy Check
CRLF—Carriage Return Line Feed
CRM—Customer Relationship Management
CRS—Computer Reservations System
CRT—Cathode Ray Tube
CRUD—Create, Read, Update and Delete
CS—Cable Select
CS—Computer Science
CSE—Computer Science and Engineering
CSI—Common System Interface
CSP—Communicating Sequential Processes
CSRF—Cross-Site Request Forgery
CSS—Cascading Style Sheets
CSS—Content-Scrambling System
CSS—Closed Source Software
CSS—Cross-Site Scripting
CSV—Comma-Separated Values
CT—Computerized Tomography
CTAN—Comprehensive TeX Archive Network
CTCP—Client-To-Client Protocol
CTI—Computer Telephony Integration
CTL—Computational Tree Logic
CTM—Close To Metal
CTS—Clear To Send
CTSS—Compatible Time-Sharing System
CUA—Common User Access8
CVS—Concurrent Versioning System

D
DAC—Digital-To-Analog Converter
DAC—Discretionary Access Control
DAO—Data Access Objects
DAO—Disk-At-Once
DAP—Directory Access Protocol
DARPA—Defense Advanced Research Projects Agency
DAT—Digital Audio Tape
DB—Database
DBA—Database Administrator
DBCS—Double Byte Character Set
DBMS—Database Management System
DCC—Direct Client-to-Client
DCCP—Datagram Congestion Control Protocol
DCCA—Debian Common Core Alliance
DCL—Data Control Language
DCMI—Dublin Core Metadata Initiative
DCOM—Distributed Component Object Model
DD—Double Density
DDE—Dynamic Data Exchange
DDL—Data Definition Language
DDoS—Distributed Denial of Service
DDR—Double Data Rate
DEC—Digital Equipment Corporation
DES—Data Encryption Standard
dev—development
DFA—Deterministic Finite Automaton
DFD—Data Flow Diagram
DFS—Depth-First Search
DFS—Distributed File System
DGD—Dworkin’s Game Driver
DHCP—Dynamic Host Configuration Protocol
DHTML—Dynamic Hypertext Markup Language9
DIF—Data Integrity Field
DIMM—Dual Inline Memory Module
DIN—Deutsches Institut für Normung
DIP—Dual In-line Package
DIVX—Digital Video Express
DKIM—Domain Keys Identified Mail
DL—Download
DLL—Dynamic Link Library
DLNA—Digital Living Network Alliance
DLP—Digital Light Processing
DMA—Direct Memory Access
DMCA—Digital Millennium Copyright Act
DMI—Direct Media Interface
DML—Data Manipulation Language
DML—Definitive Media Library
DMR—Dennis M. Ritchie
DN—Distinguished Name
DND—Drag-and-Drop
DNS—Domain Name System
DOCSIS—Data Over Cable Service Interface Specification
DOM—Document Object Model
DoS—Denial of Service
DOS—Disk Operating System
DP—Dot Pitch
DPC—Deferred Procedure Call
DPI—Deep Packet Inspection
DPI—Dots Per Inch
DPMI—DOS Protected Mode Interface
DPMS—Display Power Management Signaling
DRAM—Dynamic Random Access Memory
DR-DOS—Digital Research – Disk Operating System
DRI—Direct Rendering Infrastructure
DRM—Digital Rights Management
DRM—Direct Rendering Manager
DSDL—Document Schema Definition Languages
DSDM—Dynamic Systems Development Method10
DSL—Digital Subscriber Line
DSL—Domain-Specific Language
DSLAM—Digital Subscriber Line Access Multiplexer
DSN—Database Source Name
DSN—Data Set Name
DSP—Digital Signal Processor
DSSSL—Document Style Semantics and Specification Language
DTD—Document Type Definition
DTE—Data Terminal Equipment
DTP—Desktop Publishing
DTR—Data Terminal Ready
DVD—Digital Versatile Disc
DVD—Digital Video Disc
DVD-R—DVD-Recordable
DVD-ROM—DVD-Read Only Memory
DVD-RW—DVD-Rewritable
DVI—Digital Visual Interface
DVR—Digital Video Recorder

E
EAI—Enterprise Application Integration
EAP—Extensible Authentication Protocol
EBCDIC—Extended Binary Coded Decimal Interchange Code
EBML—Extensible Binary Meta Language
ECC—Elliptic Curve Cryptography
ECMA—European Computer Manufacturers Association
ECN—Explicit Congestion Notification
ECOS—Embedded Configurable Operating System
ECRS—Expense and Cost Recovery System
EDA—Electronic Design Automation
EDI—Electronic Data Interchange
EDO—Extended Data Out
EDSAC—Electronic Delay Storage Automatic Calculator
EDVAC—Electronic Discrete Variable Automatic Computer
EEPROM—Electronically Erasable Programmable Read-Only Memory11
EFF—Electronic Frontier Foundation
ENIAC—Electronic Numerical Integrator And Calculator
EFI—Extensible Firmware Interface
EFM—Eight-to-Fourteen Modulation
EGA—Enhanced Graphics Array
EGP—Exterior Gateway Protocol
eID—electronic ID card
EIDE—Enhanced IDE
EIGRP—Enhanced Interior Gateway Routing Protocol
EISA—Extended Industry Standard Architecture
ELF—Extremely Low Frequency
ELF—Executable and Linkable Format
ELM—ELectronic Mail
EMACS—Editor MACroS
EMS—Expanded Memory Specification
ENIAC—Electronic Numerical Integrator And Computer
EOF—End of File
EOL—End of Life
EOL—End of Line
EOM—End Of Message
EPIC—Explicitly Parallel Instruction Computing
EPROM—Erasable Programmable Read-Only Memory
ERP—Enterprise Resource Planning
ESCON—Enterprise Systems Connection
ESD—Electrostatic Discharge
ETL—Extract, Transform, Load
ESR—Eric Steven Raymond
EUC—Extended Unix Code
EULA—End User License Agreement
EXT—EXTended file system12

F
FAP—FORTRAN Assembly Program
FASM—Flat ASseMbler
FAT—File Allocation Table
FAQ—Frequently Asked Questions
FBDIMM—Fully Buffered Dual Inline Memory Module
FC-AL—Fibre Channel Arbitrated Loop
FCB—File Control Block
FCS—Frame Check Sequence
FDC—Floppy Disk Controller
FDS—Fedora Directory Server
FDD—Floppy Disk Drive
FDDI—Fiber Distributed Data Interface
FDMA—Frequency-Division Multiple Access
FEC—Forward Error Correction
FEMB—Front-End Motherboard
FET—Field Effect Transistor
FHS—Filesystem Hierarchy Standard
FICON—FIber CONnectivity
FIFO—First In First Out
FIPS—Federal Information Processing Standards
FL—Function Level
FLAC—Free Lossless Audio Codec
FLOPS—FLoating-Point Operations Per Second
FLOSS—Free/Libre/Open Source Software
FMC— Fixed Mobile Convergence “Mobile UC or Unified Communications over Wireless”

FOLDOC—Free On-line Dictionary of Computing
FOSDEM—Free and Open source Software Developers’ European Meeting
FOSI—Formatted Output Specification Instance
FOSS—Free and Open Source Software
FP—Function Programming
FPGA—Field Programmable Gate Array
FPS—Floating Point Systems
FPU—Floating Point Unit13
FRU—Field Replaceable Unit
FS—File System
FSB—Front Side Bus
fsck—File System Check
FSF—Free Software Foundation
FSM—Finite State Machine
FTTC—Fiber To The Curb
FTTH—Fiber To The Home
FTTP—Fiber To The Premises
FTP—File Transfer Protocol
FQDN—Fully Qualified Domain Name
FUD—Fear Uncertainty Doubt
FWS—Folding White Space
FXP—File eXchange Protocol
G
G11N—Globalization
Gas—GNU Assembler
Gb—Gigabit
GB—Gigabyte
GCC—GNU Compiler Collection
GCJ—GNU Compiler for Java
GCR—Group Code Recording
GDB—GNU Debugger
GDI—Graphics Device Interface
GFDL—GNU Free Documentation License
GIF—Graphics Interchange Format
GIGO—Garbage In, Garbage Out
GIMP—GNU Image Manipulation Program
GIMPS—Great Internet Mersenne Prime Search
GIS—Geographic Information System
GLUT—OpenGL Utility Toolkit
GML—Geography Markup Language
GNOME—GNU Network Object Model Environment
GNU—GNU’s Not Unix
14
GOMS—Goals, Operators, Methods, and Selection rules
GPASM—GNU PIC ASseMbler
GPG—GNU Privacy Guard
GPGPU—General-Purpose Computing on Graphics Processing Units
GPIB—General-Purpose Instrumentation Bus
GPL—General Public License
GPL—General-Purpose Language
GPRS—General Packet Radio Service
GPT—GUID Partition Table
GPU—Graphics Processing Unit
GRUB—Grand Unified Boot-Loader
GSM—Global System for Mobile Communications
GTK+—GIMP Toolkit
GUI—Graphical User Interface
GUID—Globally Unique IDentifier
GWT—Google Web Toolkit
H
HAL—Hardware Abstraction Layer
HBA—Host Bus Adapter
HCI—Human Computer Interaction
HD—High Density
HDD—Hard Disk Drive
HCL—Hardware Compatibility List
HD DVD—High Definition DVD
HDL—Hardware Description Language
HDMI—High-Definition Multimedia Interface
HF—High Frequency
HHD—Hybrid Hard Drive
HID—Human Interface Device
HIG—Human Interface Guidelines
HIRD—Hurd of Interfaces Representing Depth
HLASM—High Level ASseMbler
HMA—High Memory Area
HP—Hewlett-Packard
HPC—High-Performance Computing
15
HPFS—High Performance File System
HTC—High-Throughput Computing
HSM—Hierarchical Storage Management
HT—Hyper Threading
HTM—Hierarchical Temporal Memory
HTML—Hypertext Markup Language
HTTP—Hypertext Transfer Protocol
HTTPd—Hypertext Transport Protocol Daemon
HTX—HyperTransport eXpansion
HURD—Hird of Unix-Replacing Daemons
HVD—Holographic Versatile Disc
Hz—Hertz
I
I²C—Inter-Integrated Circuit
I18N—Internationalization
IANA—Internet Assigned Numbers Authority
iBCS—Intel Binary Compatibility Standard
IBM—International Business Machines
IC—Integrated Circuit
ICANN—Internet Corporation for Assigned Names and Numbers
ICE—In-Circuit Emulator
ICE—Intrusion Countermeasure Electronics
ICMP—Internet Control Message Protocol
ICP—Internet Cache Protocol
ICT—Information and Communication Technology
IDE—Integrated Development Environment
IDE—Integrated Drive Electronics
IDF—Intermediate Distribution Frame
IDL—Interface Definition Language
IDS—Intrusion Detection System
IE—Internet Explorer
IEC—International Electrotechnical Commission
IEEE—Institute of Electrical and Electronics Engineers
IETF—Internet Engineering Task Force
16
IFL—Integrated Facility for Linux
IGMP—Internet Group Management Protocol
IGRP—Interior Gateway Routing Protocol
IHV—Independent Hardware Vendor
IIOP—Internet Inter-Orb Protocol
IIS—Internet Information Services
IL—Intermediate Language
IM—Instant Messaging
IMAP—Internet Message Access Protocol
IME—Input Method Editor
INFOSEC—Information Systems Security
I/O—Input/Output
IP—Intellectual Property
IP—Internet Protocol
IPC—Inter-Process Communication
IPL—Initial Program Load
IPO—Inter Procedural Optimization
IPP—Internet Printing Protocol
IPS—Intrusion Prevention System
IPsec—Internet Protocol security
IPTV—Internet Protocol Television
IPX—Internetwork Packet Exchange
IR—Intermediate Representation
IRC—Internet Relay Chat
IrDA—Infrared Data Association
IRI—Internationalized Resource Identifier
IRP—I/O Request Packet
IRQ—Interrupt Request
IS—Information Systems
ISA—Industry Standard Architecture
ISA—Instruction Set Architecture
ISAM—Indexed Sequential Access Method
ISC—Internet Storm Center
iSCSI—Internet Small Computer System Interface
ISDN—Integrated Services Digital Network
ISO—International Organization for Standardization
17
iSNS—Internet Storage Name Service
ISP—Internet Service Provider
ISPF—Interactive System Productivity Facility
ISR—Interrupt Service Routine
ISV—Independent Software Vendor
IT—Information Technology
ITIL—Information Technology Infrastructure Library
ITL—Interval Temporal Logic
ITU—International Telecommunication Union
IVRS-Interactive Voice Response System
J
J2EE—Java 2 Enterprise Edition
J2ME—Java 2 Micro Edition
J2SE—Java 2 Standard Edition
JAXB—Java Architecture for XML Binding
JAX-RPC—Java XML for Remote Procedure Calls
JAXP—Java API for XML Processing
JBOD—Just a Bunch of Disks
JCE — Java Cryptography Extension
JCL—Job Control Language
JCP—Java Community Process
JDBC—Java Database Connectivity
JDK—Java Development Kit
JES—Job Entry Subsystem
JDS—Java Desktop System
JFC—Java Foundation Classes
JFET—Junction Field-Effect Transistor
JFS—IBM Journaling File System
JINI—Jini Is Not Initials
JIT—Just-In-Time
JMX—Java Management Extensions
JMS—Java Message Service
JNDI—Java Naming and Directory Interface
JNI—Java Native Interface
18
JNZ—Jump non-zero
JPEG—Joint Photographic Experts Group
JRE—Java Runtime Environment
JS—JavaScript
JSON—JavaScript Object Notation
JSP—Jackson Structured Programming
JSP—JavaServer Pages
JTAG—Joint Test Action Group
JUG—Java Users Group
JVM—Java Virtual Machine
jwz—Jamie Zawinski
K
K&R—Kernighan and Ritchie
KB—Keyboard
Kb—Kilobit
KB—Kilobyte
KB—Knowledge Base
KDE—K Desktop Environment
kHz—Kilohertz
KM—Knowledge Machine
KRL—Knowledge Representation Language
KVM—Keyboard, Video, Mouse
L
L10N—Localization
L2TP—Layer two Tunneling Protocol
LAMP—Linux Apache MySQL Perl
LAMP—Linux Apache MySQL PHP
LAMP—Linux Apache MySQL Python
LAN—Local Area Network
LBA—Logical Block Addressing
LCD—Liquid Crystal Display
LCR—Least Cost Routing
19
LCOS—Liquid Crystal On Silicon
LDAP—Lightweight Directory Access Protocol
LE—Logical Extents
LED—Light-Emitting Diode
LF—Line Feed
LF—Low Frequency
LFS—Linux From Scratch
LGPL—Lesser General Public License
LIB—LIBrary
LIF—Low Insertion Force
LIFO—Last In First Out
LILO—Linux Loader
LISP—LISt Processing
LKML—Linux Kernel Mailing List
LM—Lan Manager
LOC—Lines of Code
LPC—Lars Pensjö C
LPI—Linux Professional Institute
LPT — Line Print Terminal
LSB—Least Significant Bit
LSB—Linux Standard Base
LSI—Large-Scale Integration
LTL—Linear Temporal Logic
LTR—Left-to-Right
LUG—Linux User Group
LUN—Logical Unit Number
LV—Logical Volume
LVD—Low Voltage Differential
LVM—Logical Volume Management
LZW—Lempel-Ziv-Welch
M
MAC—Mandatory Access Control
MAC—Media Access Control
MAN—Metropolitan Area Network
20
MANET—Mobile Ad-Hoc Network
MAPI—Messaging Application Programming Interface
Mb—Megabit
MB—Megabyte
MBCS—Multi Byte Character Set
MBR—Master Boot Record
MCA—Micro Channel Architecture
MCA—Microsoft Certified Architect
MCAD—Microsoft Certified Application Developer
MCAS—Microsoft Certified Application Specialist
MCDBA—Microsoft Certified DataBase Administrator
MCDST—Microsoft Certified Desktop Support Technician
MCITP—Microsoft Certified Information Technology Professional
MCM—Microsoft Certified Master
MCP—Microsoft Certified Professional
MCPD—Microsoft Certified Professional Developer
MCSA—Microsoft Certified Systems Administrator
MCSD—Microsoft Certified Solution Developer
MCSE—Microsoft Certified Systems Engineer
MCT—Microsoft Certified Trainer
MCTS—Microsoft Certified Technology Specialist
MDA—Mail Delivery Agent
MDA—Model-Driven Architecture
MDA—Monochrome Display Adapter
MDF—Main Distribution Frame
MDI—Multiple Document Interface
ME—[Windows] Millennium Edition
MF—Medium Frequency
MFC—Microsoft Foundation Classes
MFM—Modified Frequency Modulation
MGCP—Media Gateway Control Protocol
MHz—Megahertz
MIB—Management Information Base
MICR—Magnetic Ink Character Recognition
MIDI—Musical Instrument Digital Interface
MIMD—Multiple Instruction, Multiple Data21
MIMO—Multiple-Input Multiple-Output
MINIX—MIni-uNIX
MIPS—Million Instructions Per Second
MIPS—Microprocessor without Interlocked Pipeline Stages
MIS—Management Information Systems
MISD—Multiple Instruction, Single Data
MIT—Massachusetts Institute of Technology
MIME—Multipurpose Internet Mail Extensions
MMDS—Mortality Medical Data System
MMI—Man Machine Interface.
MMIO—Memory-Mapped I/O
MMORPG—Massively Multiplayer Online Role-Playing Game
MMU—Memory Management Unit
MMX—Multi-Media Extensions
MNG—Multiple-image Network Graphics
MoBo—Motherboard
MOM—Message-Oriented Middleware
MOO—MUD Object Oriented
MOS—Microsoft Office Specialist
MOSFET—Metal-Oxide Semiconductor Field Effect Transistor
MOTD—Message Of The Day
MOUS—Microsoft Office User Specialist
MPAA—Motion Picture Association of America
MPEG—Motion Pictures Experts Group
MPL—Mozilla Public License
MPLS—Multiprotocol Label Switching
MPU—Microprocessor Unit
MS—Memory Stick
MS—Microsoft
MSB—Most Significant Bit
MS-DOS—Microsoft DOS
MT—Machine Translation
MTA—Mail Transfer Agent
MTA—Microsoft Technology Associate
MTBF—Mean Time Between Failures
MTU—Maximum Transmission Unit
22
MSA—Mail Submission Agent
MSDN—Microsoft Developer Network
MSI—Medium-Scale Integration
MSI—Message Signaled Interrupt
MSI—Microsoft Installer
MUA—Mail User Agent
MUD—Multi-User Dungeon
MVC—Model-View-Controller
MVP—Most Valuable Professional
MVS—Multiple Virtual Storage
MX—Mail exchange
MXF—Material Exchange Format
N
NACK—Negative ACKnowledgement
NAK—Negative AcKnowledge Character
NaN—Not a Number
NAS—Network-Attached Storage
NASM—Netwide ASseMbler
NAT—Network Address Translation
NCP—NetWare Core Protocol
NCQ—Native Command Queuing
NCSA—National Center for Supercomputing Applications
NDPS—Novell Distributed Print Services
NDS—Novell Directory Services
NEP—Network Equipment Provider
NetBIOS—Network Basic Input/Output System
NEXT—Near-End CrossTalk
NFA—Nondeterministic Finite Automaton
NFS—Network File System
NGL—aNGeL
NGSCB—Next-Generation Secure Computing Base
NI—National Instruments
NIC—Network Interface Controller
NIM—No Internal Message
23
NIO—New I/O
NIST—National Institute of Standards and Technology
NLP—Natural Language Processing
NLS—Native Language Support
NP—Nondeterministic Polynomial time
NPL—Netscape Public License
NPU—Network Processing Unit
NS—Netscape
NSA—National Security Agency
NSPR—Netscape Portable Runtime
NMI—Non-Maskable Interrupt
NNTP—Network News Transfer Protocol
NOC—Network Operations Center
NOP—No OPeration
NOS—Network Operating System
NPTL—Native POSIX Thread Library
NSS—Novell Storage Service
NSS—Network Security Services
NSS—Name Service Switch
NT—New Technology
NTFS—NT Filesystem
NTLM—NT Lan Manager
NTP—Network Time Protocol
NUMA—Non-Uniform Memory Access
NURBS—Non-Uniform Rational B-Spline
NVR—Network Video Recorder
NVRAM—Non-Volatile Random Access Memory
O
OASIS—Organization for the Advancement of Structured Information Standards
OAT—Operational Acceptance Testing
OBSAI—Open Base Station Architecture Initiative
ODBC—Open DataBase Connectivity
OEM—Original Equipment Manufacturer
OES—Open Enterprise Server
24
OFTC—Open and Free Technology Community
OLAP—Online Analytical Processing
OLE—Object Linking and Embedding
OLED—Organic Light Emitting Diode
OLPC—One Laptop per Child
OLTP—Online Transaction Processing
OMF—Object Module Format
OMG—Object Management Group
OMR—Optical Mark Recognition
OO—Object-Oriented
OO—OpenOffice
OOE—Out-of-Order Execution
OOM—Out Of Memory
OOo—OpenOffice.org
OoOE—Out-of-Order Execution
OOP—Object-Oriented Programming
OOTB—Out of the box
OPML—Outline Processor Markup Language
ORB—Object Request Broker
ORM—Oject-Relational Mapping
OS—Open Source
OS—Operating System
OSCON—O’Reilly Open Source CONvention
OSDN—Open Source Developer Network
OSI—Open Source Initiative
OSI—Open Systems Interconnection
OSPF—Open Shortest Path First
OSS—Open Sound System
OSS—Open-Source Software
OSS—Operations Support System
OSTG—Open Source Technology Group
OUI—Organizationally Unique Identifier
25
P
P2P—Peer-To-Peer
PAC—Programmable Automation Controller
PAN—Personal Area Network
PAP—Password Authentication Protocol
PARC—Palo Alto Research Center
PATA—Parallel ATA
PC—Personal Computer
PCB—Printed Circuit Board
PCB—Process Control Block
PC DOS—Personal Computer Disk Operating System
PCI—Peripheral Component Interconnect
PCIe—PCI Express
PCL—Printer Command Language
PCMCIA—Personal Computer Memory Card International Association
PCM—Pulse-Code Modulation
PCRE—Perl Compatible Regular Expressions
PD—Public Domain
PDA—Personal Digital Assistant
PDF—Portable Document Format
PDH—Plesiochronous Digital Hierarchy
PDP—Programmed Data Processor
PE—Physical Extents
PERL—Practical Extraction and Reporting Language
PGA—Pin Grid Array
PGO—Profile-Guided Optimization
PGP—Pretty Good Privacy
PHP—PHP: Hypertext Preprocessor
PIC—Peripheral Interface Controller
PIC—Programmable Interrupt Controller
PID—Proportional-Integral-Derivative
PID—Process ID
PIM—Personal Information Manager
PINE—Program for Internet News and Email
PIO—Programmed Input/Output
26
PKCS—Public Key Cryptography Standards
PKI—Public Key Infrastructure
PLC—Power Line Communication
PLC—Programmable Logic Controller
PLD—Programmable Logic Device
PL/I—Programming Language One
PL/M—Programming Language for Microcomputers
PL/P—Programming Language for Prime
PLT—Power Line Telecoms
PMM—POST Memory Manager
PNG—Portable Network Graphics
PnP—Plug-and-Play
PoE—Power over Ethernet
POID—Persistent Object Identifier
POJO—Plain Old Java Object
POP—Point of Presence
POP3—Post Office Protocol v3
POSIX—Portable Operating System Interface
POST—Power-On Self Test
PPC—PowerPC
PPI—Pixels Per Inch
PPP—Point-to-Point Protocol
PPPoA—PPP over ATM
PPPoE—PPP over Ethernet
PPTP—Point-to-Point Tunneling Protocol
PS—PostScript
PSA—Professional Services Automation
PS/2—Personal System/2
PSU—Power Supply Unit
PSVI—Post-Schema-Validation Infoset
PTS-DOS—PhysTechSoft – Disk Operating System
PV—Physical Volume
PVG—Physical Volume Group
PVR—Personal Video Recorder
PXE—Preboot Execution Environment
PXI—PCI eXtensions for Instrumentation
27
Q
QDR—Quad Data Rate
QA—Quality Assurance
QFP—Quad Flat Package
QoS—Quality of Service
QOTD—Quote of the Day
Qt—Quasar Toolkit
QTAM—Queued Teleprocessing Access Method
R
RACF—Resource Access Control Facility
RAD—Rapid Application Development
RADIUS—Remote Authentication Dial In User Service
RAID—Redundant Array of Independent Disks
RAID—Redundant Array of Inexpensive Disks
RAIT—Redundant Array of Inexpensive Tapes
RAM—Random Access Memory
RARP—Reverse Address Resolution Protocol
RAS—Reliability, Availability and Serviceability
RAS—Remote Access Service
RRAS Routing and Remote Access Service
RC—Region Code
RC—Release Candidate
RC—Run Commands
RCS—Revision Control System
RDBMS—Relational DataBase Management System
RDC—Remote Desktop Connection
RDF—Resource Description Framework
RDM—Relational Data Model
RDOS—Real-time Disk Operating System
RDS—Remote Data Services
REFAL—REcursive Functions Algorithmic Language
REST—Representational State Transfer
28
regex—Regular Expression
regexp—Regular Expression
RF—Radio Frequency
RFC—Request For Comments
RFI—Radio Frequency Interference
RFID—Radio Frequency Identification
RGB—Red, Green, Blue
RGBA—Red, Green, Blue, Alpha
RHL—Red Hat Linux
RHEL—Red Hat Enterprise Linux
RIA—Rich Internet Application
RIAA—Recording Industry Association of America
RIP—Raster Image Processor
RIP—Routing Information Protocol
RIR—Regional Internet registry
RISC—Reduced Instruction Set Computer
RISC OS—Reduced Instruction Set Computer Operating System
RJE—Remote Job Entry
RLE—Run-Length Encoding
RLL—Run-Length Limited
RMI—Remote Method Invocation
RMS—Richard Matthew Stallman
ROM—Read Only Memory
ROMB—Read-Out Motherboard
ROM-DOS—Read Only Memory – Disk Operating System
RPC—Remote Procedure Call
RPG—Report Program Generator
RPM—RPM Package Manager
RSA—Rivest Shamir Adleman
RSI—Repetitive Strain Injury
RSS—Radio Service Software
RSS—Rich Site Summary, RDF Site Summary, or Really Simple Syndication
RTAI—Real-Time Application Interface
RTC—Real-Time Clock
RTE—Real-Time Enterprise
RTEMS—Real-Time Executive for Multiprocessor Systems
29
RTL—Right-to-Left
RTOS—Real-Time Operating System
RTP—Real-time Transport Protocol
RTS—Ready To Send
RTSP—Real Time Streaming Protocol
S
SaaS—Software as a Service
SAN—Storage Area Network
SAS—Serial attached SCSI
SATA—Serial ATA
SAX—Simple API for XML
SBOD—Spinning Beachball of Death
SBP-2—Serial Bus Protocol 2
sbin—superuser binary
SBU—Standard Build Unit
SCADA—Supervisory Control And Data Acquisition
SCID—Source Code in Database
SCM—Software Configuration Management
SCM—Source Code Management
SCP—Secure Copy
SCPI—Standard Commands for Programmable Instrumentation
SCSI—Small Computer System Interface
SCTP—Stream Control Transmission Protocol
SD—Secure Digital
SDDL—Security Descriptor Definition Language
SDH—Synchronous Digital Hierarchy
SDI—Single Document Interface
SDIO—Secure Digital Input Output
SDK—Software Development Kit
SDL—Simple DirectMedia Layer
SDN—Service Delivery Network
SDP—Session Description Protocol
SDR—Software-Defined Radio
SDRAM—Synchronous Dynamic Random Access Memory
30
SDSL—Symmetric DSL
SE—Single Ended
SEAL—Semantics-directed Environment Adaptation Language
SEI—Software Engineering Institute
SEO—Search Engine Optimization
SFTP—Secure FTP
SFTP—Simple File Transfer Protocol
SFTP—SSH File Transfer Protocol
SGI—Silicon Graphics, Incorporated
SGML—Standard Generalized Markup Language
SHA—Secure Hash Algorithm
SHDSL—Single-pair High-speed Digital Subscriber Line
SIGCAT—Special Interest Group on CD-ROM Applications and Technology
SIGGRAPH—Special Interest Group on Graphics
SIMD—Single Instruction, Multiple Data
SIMM—Single Inline Memory Module
SIP—Session Initiation Protocol
SIP—Supplementary Ideographic Plane
SISD—Single Instruction, Single Data
SISO – Single-Input and Single-Output
SLED—SUSE Linux Enterprise Desktop
SLES—SUSE Linux Enterprise Server
SLI—Scalable Link Interface
SLIP—Serial Line Internet Protocol
SLM—Service Level Management
SLOC—Source Lines of Code
SPM—Software project management
SPMD—Single Program, Multiple Data
SMA—SubMiniature version A
SMB—Server Message Block
SMBIOS—System Management BIOS
SMIL—Synchronized Multimedia Integration Language
S/MIME—Secure/Multipurpose Internet Mail Extensions
SMP—Supplementary Multilingual Plane
SMP—Symmetric Multi-Processing
SMS—Short Message Service
31
SMS—System Management Server
SMT—Simultaneous Multithreading
SMTP—Simple Mail Transfer Protocol
SNA—Systems Network Architecture
SNMP—Simple Network Management Protocol
SNTP—Simple Network Time Protocol
SOA—Service-Oriented Architecture
SOE—Standard Operating Environment
SOAP—Simple Object Access Protocol
SoC—System-on-a-Chip
SO-DIMM—Small Outline DIMM
SOHO—Small Office/Home Office
SOI—Silicon On Insulator
SP—Service Pack
SPA—Single Page Application
SPF—Sender Policy Framework
SPI—Serial Peripheral Interface
SPI—Stateful Packet Inspection
SPARC—Scalable Processor Architecture
SQL—Structured Query Language
SRAM—Static Random Access Memory
SSA—Static Single Assignment
SSD—Software Specification Document
SSD—Solid-State Drive
SSE—Streaming SIMD Extensions
SSH—Secure Shell
SSI—Server Side Includes
SSI—Single-System Image
SSI—Small-Scale Integration
SSID—Service Set Identifier
SSL—Secure Socket Layer
SSP—Supplementary Special-purpose Plane
SSSE—Supplementary Streaming SIMD Extensions
su—superuser
SUS—Single UNIX Specification
SUSE—Software und System-Entwicklung
32
SVC—Scalable Video Coding
SVG—Scalable Vector Graphics
SVGA—Super Video Graphics Array
SVD—Structured VLSI Design
SWF—Shock Wave Flash
SWT—Standard Widget Toolkit
Sysop—System operator
T
TAO—Track-At-Once
TASM—Turbo ASseMbler
TB—TeraByte
Tcl—Tool Command Language
TCP—Transmission Control Protocol
TCP/IP—Transmission Control Protocol/Internet Protocol
TCU—Telecommunication Control Unit
TDMA—Time Division Multiple Access
TFT—Thin Film Transistor
TI—Texas Instruments
TLA—Three-Letter Acronym
TLD—Top-Level Domain
TLS—Thread-Local Storage
TLS—Transport Layer Security
TLV—Type-length-value
tmp—temporary
TNC—Terminal Node Controller
TNC—Threaded Neill-Concelman connector
TPF—Transaction Processing Facility
TROFF—Trace Off
TRON—Trace On
TRON—The Real-time Operating system Nucleus
TRS-DOS—Tandy Radio Shack – Disk Operating System
TSO—Time Sharing Option
TSP—Traveling Salesman Problem
TSR—Terminate and Stay Resident
TTA—True Tap Audio
33
TTF—TrueType Font
TTL—Transistor-Transistor Logic
TTL—Time To Live
TTS—Text-to-Speech
TTY—Teletype
TUCOWS—The Ultimate Collection of Winsock Software
TUG—TeX Users Group
TWAIN—Technology Without An Interesting Name
U
UAAG—User Agent Accessibility Guidelines
UAC—User Account Control
UART—Universal Asynchronous Receiver/Transmitter
UAT—User Acceptance Testing
UCS—Universal Character Set
UDDI—Universal Description, Discovery, and Integration
UDMA—Ultra DMA
UDP—User Datagram Protocol
UEFI—Unified Extensible Firmware Interface
UHF—Ultra High Frequency
UI—User Interface
UL—Upload
ULA—Uncommitted Logic Array
UMA—Upper Memory Area
UMB—Upper Memory Block
UML—Unified Modeling Language
UML—User-Mode Linux
UMPC—Ultra-Mobile Personal Computer
UNC—Universal Naming Convention
UPS—Uninterruptible Power Supply
URI—Uniform Resource Identifier
URL—Uniform Resource Locator
URN—Uniform Resource Name
USB—Universal Serial Bus
usr—user
34
USR—U.S. Robotics
UTC—Coordinated Universal Time
UTF—Unicode Transformation Format
UTP—Unshielded Twisted Pair
UUCP—Unix to Unix Copy
UUID—Universally Unique Identifier
UUN—Universal User Name
UVC—Universal Virtual Computer
UX—User Experience
V
var—variable
VAX—Virtual Address eXtension
VCPI—Virtual Control Program Interface
VR—Virtual Reality
VRML—Virtual Reality Modeling Language
VB—Visual Basic
VBA—Visual Basic for Applications
VBS—Visual Basic Script
VDSL—Very High Bitrate Digital Subscriber Line
VESA—Video Electronics Standards Association
VFAT—Virtual FAT
VFS—Virtual File System
VG—Volume Group
VGA—Video Graphics Array
VHF—Very High Frequency
VLAN—Virtual Local Area Network
VLSM—Variable Length Subnet Mask
VLB—Vesa Local Bus
VLF—Very Low Frequency
VLIW—Very Long Instruction Word
VLSI—Very-Large-Scale Integration
VM—Virtual Machine
VM—Virtual Memory
VNC—Virtual Network Computing
35
VOD—Video On Demand
VoIP—Voice over Internet Protocol
VPN—Virtual Private Network
VPU—Visual Processing Unit
VSAM—Virtual Storage Access Method
VSAT—Very Small Aperture Terminal
VT—Video Terminal?
VTAM—Virtual Telecommunications Access Method
W
W3C—World Wide Web Consortium
WAFS—Wide Area File Services
WAI—Web Accessibility Initiative
WAIS—Wide Area Information Server
WAN—Wide Area Network
WAP—Wireless Access Point
WAP—Wireless Application Protocol
WASM—Watcom ASseMbler
WBEM—Web-Based Enterprise Management
WCAG—Web Content Accessibility Guidelines
WCF—Windows Communication Foundation
WDM—Wavelength-Division Multiplexing
WebDAV—WWW Distributed Authoring and Versioning
WEP—Wired Equivalent Privacy
WFI—Wait For Interrupt
WiMAX—Worldwide Interoperability for Microwave Access
WinFS—Windows Future Storage
WINS—Windows Internet Name Service
WLAN—Wireless Local Area Network
WMA—Windows Media Audio
WMV—Windows Media Video
WOL—Wake-on-LAN
WOM—Wake-on-Modem
WOR—Wake-on-Ring
WPA—Wi-Fi Protected Access
36
WPAN—Wireless Personal Area Network
WPF—Windows Presentation Foundation
WSDL—Web Services Description Language
WSFL—Web Services Flow Language
WUSB—Wireless Universal Serial Bus
WWAN—Wireless Wide Area Network
WWID—World Wide Identifier
WWN—World Wide Name
WWW—World Wide Web
WYSIWYG—What You See Is What You Get
WZC—Wireless Zero Configuration
X
XAG—XML Accessibility Guidelines
XAML—eXtensible Application Markup Language
XDM—X Window Display Manager
XDMCP—X Display Manager Control Protocol
XCBL—XML Common Business Library
XHTML—eXtensible Hypertext Markup Language
XILP—X Interactive ListProc
XML—eXtensible Markup Language
XMMS—X Multimedia System
XMPP—eXtensible Messaging and Presence Protocol
XMS—Extended Memory Specification
XNS—Xerox Network Systems
XP—Cross-Platform
XP—Extreme Programming
XPCOM—Cross Platform Component Object Model
XPI—XPInstall
XPIDL—Cross-Platform IDL
XSD—XML Schema Definition
XSL—eXtensible Stylesheet Language
XSL-FO—eXtensible Stylesheet Language Formatting Objects
XSLT—eXtensible Stylesheet Language Transformations
XSS—Cross-Site Scripting
37
XTF—eXtensible Tag Framework
XTF—eXtended Triton Format
XUL—XML User Interface Language
XVGA-Extended Video Graphics Adapter
Y
Y2K—Year Two Thousand
YAAF—Yet Another Application Framework
YACC—Yet Another Compiler Compiler
YAML—YAML Ain’t Markup Language
YaST—Yet another Setup Tool
Z
ZCAV—Zone Constant Angular Velocity
ZCS—Zero Code Suppression
ZIF—Zero Insertion Force
ZIFS—Zero Insertion Force Socket
ZISC—Zero Instruction Set Computer
ZOI—Zero One Infinity
ZOPE—Z Object Publishing Environment
ZMA—Zone Multicast Address
ZPL—Z-level Programming Language
38
0–9
/.—Slashdot
1GL—First-Generation Programming Language
1NF—First Normal Form
10B2—10BASE-2
10B5—10BASE-5
10B-F—10BASE-F
10B-FB—10BASE-FB
10B-FL—10BASE-FL
10B-FP—10BASE-FP
10B-T—10BASE-T
100B-FX—100BASE-FX
100B-T—100BASE-T
100B-TX—100BASE-TX
100BVG—100BASE-VG
286—Intel 80286 processor
2B1Q—2 Binary 1 Quaternary
2GL—Second-Generation Programming Language
2NF—Second Normal Form
3GL—Third-Generation Programming Language
3NF—Third Normal Form
386—Intel 80386 processor
486—Intel 80486 processor
4B5BLF—4 Byte 5 Byte Local Fiber
4GL—Fourth-Generation Programming Language
4NF—Fourth Normal Form
5GL—Fifth-Generation Programming Language
5NF—Fifth Normal Form
6NF—Sixth Normal Form
8B10BLF—8 Byte 10 Byte Local Fiber39

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Some Extra Important abbreviation of IT & Network :
URL- Uniform Resource Locator
HTML- Hypertext Markup Language
DHTML- Dynamic Hypertext Markup Language
PHP- Hypertext Processor
SQL- Structured query language
XML- Extensible Markup Language
AJAX- Asynchronous JAVA Cript & XML
ASP- Application Service Provider
SSI- Server Side Include
IIS- Internet Information Service
WHM- Web host Management
SSL- Secured socket layer
PGP- Pretty Good Privacy
GPG- NU Privacy Guard
DNS- Domain Name system
CGI/GD- Common Gateway Interface
CPAN- Comprehensive Perl Archive Network
SSH- Secure Shell
POP- Point of Presence
POP3- Post office protocol V3
SMTP- Simple mail transfer protocol
IMAP- Internet Mail Transfer Protocol
IMAP- Internet Message Access Protocol
VPS- Virtual Private Server
DB- Data Base
MIDI- Musical Instrument Digital Interface
MEME- Multipurpose Internet Maul Extension
SoHo- Small office/ Home Office
SAS- Serial attached SCSI
SMTP- Simple Mail Transfer Protocol
MVC- Model View Controller
OS- Operating System
OWA-Outlook Web Access
MX- Mail exchange
VARs- Value Added Resellers VAR- Variable
RoR- Ruby on Rail (open source app. framework)

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