Input/Output devices

a) Keyboard:

It is an in put divices. Which helps us to input the data, instruction to the computer.It contains more than 102 keys. Keyboard is very essential device in which its key are also categories like this:

i) Alphabet key

Alphabet key:

A-Z key are known as alphabet keys. This key are used to type letter as well as combining to other for shut-cut key.

ii) Number Key

0- 9 key are knwon as number keys.

iii) Numeric key

Key such as -, +, /, * etc are known as numeric key.

iv) Functional key

F1 to F12 keys are known as functional key.

v) Special key

Ctrl, Alt, Spacebar key, insert, delete etc key are known as special key