A computer system needs both input and output divices. input divices help you to input data and instructions whereas output divices display the data, result of processing or any message from a computer.
1. input divices
computer needs data and instruction to work on. to input data and instructions you need input divices. there are many different input divices. keyboard and mouse are the two common input devices are microphone, digital camera, joystick,scanner, light pen, etc
2.keyboard
A keyboard is an input divec used for entering data like letters, texts,numbers, symoks and instructions.a keyboard contains a number of keys marked with alphabets, numbers, and some pther characters.a computer understands only binary codes. so, when you press a key on the keyboard ,the keyboard generates the related binary code and sends to the computer.
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