1. The five major groups of keys on a standard keyboard are:

    * The typewriter keys (letters and numbers)
    * The function keys (F1, F2, etc.)
    * The numeric keypad (numbers organized like a calculator keypad)
    * The insert, home, page up keys and their opposites
    * The up, down, left right navigation arrow keys

2. The name comes from the first six letters (keys) appearing in the top letter row of the keyboard, read left to right: Q-W-E-R-T-Y.

3. A Control key is a modifier key which, when pressed in conjunction with another key, will perform a special operation.

4. (neznam kolko treba xD) When a key is pressed, it pushes down on a rubber dome sitting beneath the key. A conductive contact on the underside of the dome touches (and hence connects) a pair of conductive lines on the circuit below.
This bridges the gap between them and allows electric current to flow (the open circuit is closed).
A scanning signal is emitted by the chip along the pairs of lines to all the keys. When the signal in one pair becomes different, the chip generates a "make code" corresponding to the key connected to that pair of lines.
The code generated is sent to the computer either via a keyboard cable (using on-off electrical pulses to represent bits) or over a wireless connection. It may be repeated.
A chip inside the computer receives the signal bits and decodes them into the appropriate keypress. The computer then decides what to do on the basis of the key pressed (e.g. display a character on the screen, or perform some action).
When the key is released, a break code (different than the make code) is sent to indicate the key is no longer pressed. If the break code is missed (e.g. due to a keyboard switch) it is possible for the keyboard controller to believe the key is pressed down when it is not, which is why pressing then releasing the key again will release the key (since another break code is sent).

5. It is an indicator used to show the position on a computer monitor or other display device that will respond to input from a pointing device (mouse).

6. The movement of the mouse is almost limitless.
Unless the user is typing a message or using keyboard shortcuts, the user can access all functions using the mouse. The process of navigating a computer hard drive or directory is achieved quickly.
Users without any previous experience simply have to move the mouse physically to achieve the action on the computer screen.

7. Drag-and-drop is the action of selecting a virtual object by "grabbing" it and dragging it to a different location or onto another virtual object.

8. In the human body, the carpal tunnel or carpal canal is the passageway on the palmar side of the wrist that connects the forearm to the middle compartment of the deep plane of the palm. The tunnel consists of bones and connective tissue. Several tendons and a nerve pass through it. Carpal Tunnel Syndrome is considered by some to be a form of repetitive stress injury, and as such, is caused by repetitive motions, most famously from long hours of computer keyboard use.