Physical Identification

Key Board

It is a device to enter the information into computer.

Information is entered by pressing its key, when required just like a typewriter but with negligible sound.

104/105 keys keyboard have become popular as standard witch can be categorised as under:

Numeric pad (0-9, +, -, /, Del, Enter)

Function keys (F1...F12)

Alphanumeric pad: ( A - Z, 0-9, mathematical symbols)

Special key (Esc, Ctrl, Alt)

Micro Scroll keys ( Left, Right, Up, Down arrow keys.)

Macro scroll keys ( Home, End, Page up, Page down.)

Apart from key as mentioned above, keyboard also has 3 status LEDs captioned Num Lock, Caps lock & Scroll lock.

Keys Function F1 - F12

Use to perform special function depending upon software being used.

Enter

Used to communicate the end of data being keyed in through the keyboard Caps Locl Used to capitalized alphabets.

Shift Caps Lock off

It captalised alphabets.

Caps-lock on

It reverse the above effect.

Also used to input upper symbols for keys with two symbols on them.

Ctrl, Alt

Pressed with other keys to input special message to the computer.

Backspace

Used to erase character to the left of cursor position.

Numlock

Used to activate the numeric keys on the numeric keypad.

Cursor keys

Used to move cursor in the direction indicated.

Home, end, pg up, pg down

Used to move cursor at the beginning of line, at the end of line. Pg up & pg down key used to see the text printed page- wise scrolling them up & down on the screen.

Insert

Used to insert characters at the current cursor position.

Del

Used to delete the characters at the current cursor position.

Esc

Generally used to return to previous menu or to cancel the command.

Scroll lock

Used to activate/deactivate the scrolling of text on the screen.

Print Screen

Used to print whatever is displayed on the screen.

Pause

Used to give pause to application running on the screen.