Test 1. Define Each

computer
a person who makes calculations, especially with a calculating machine.

system
a group of related hardware units or programs or both, especially when dedicated to a single application.

software
the programs and other operating information used by a computer.

hardware
the machines, wiring, and other physical components of a computer or other electronic system.

pc
a computer designed for use by one person at a time.

server
a computer or computer program which manages access to a centralized resource or service in a network.

input devices
an input device is a piece of computer hardware equipment used to provide data and control signals to an information processing system such as a computer or information appliance.

output devices
An output device is any piece of computer hardware equipment which converts information into human-readable form.

ram
is an acronym for random access memory, a type of computer memory that can be accessed randomly; that is, any byte of memory can be accessed without touching the preceding bytes.

rom
Read-only memory is a type of non-volatile memory used in computers and other electronic devices.

cpu
is the abbreviation for central processing unit. Sometimes referred to simply as the central processor, but more commonly called a processor

alu
An arithmetic logic unit is a combinational digital electronic circuit that performs arithmetic and bitwise operations on integer binary numbers.

cmos battery
A battery that maintains the time, date, hard disk and other configuration settings in the CMOS memory. CMOS batteries are small and are attached directly to the motherboard

chipset
a collection of integrated circuits that form the set needed to make an electronic device such as a computer motherboard or portable telephone.

bios
a set of computer instructions in firmware which control input and output operations.

usb
A Universal Serial Bus (USB) is a common interface that enables communication between devices and a host controller such as a personal computer

sata
Serial AT Attachment) is a computer bus interface that connects host bus adapters to mass storage devices such as hard disk drives, optical drives, and solid-state drives.

pata
(Parallel ATA) The original "integrated drive electronics" (IDE) technology that transferred data from the hard disk over a parallel data channel to the motherboard.

arpanet
The Advanced Research Projects Agency Network was an early packet-switching network and the first network to implement the TCP/IP protocol suite.

networking
the linking of computers to allow them to operate interactively.

netiquette
the correct or acceptable way of communicating on the Internet.

wifi
a facility allowing computers, smartphones, or other devices to connect to the Internet or communicate with one another wirelessly within a particular area.

lifi
LiFi is a wireless optical networking technology that uses light-emitting diodes (LEDs) for data transmission.

virus
is a small software program that can spread from one computer system to another and cause interferences with computer operations.

abacus
is a simple device you can use to make manual mathematical calculations by sliding counters along rows of wires set inside a frame.