What is Computer?
Computer is an Electronic Machine which can do many things quickly and accurately. The first mechanical computer created by Charles Babbage. The size of first computer was approximately same as a room in a house and it require much electricity. You can find computer in any field (Home, Offices, and Shops etc..).All over the world, 80 percent of the people use a computer. Computer doesn't do any mistake.
Main Parts Of Computer
1) Input Devices.2) Output Devices.
3) System unit.
Input Devices
An Instruction given to the computer to do some work. Input Devices play the main role to operate computer. Input devices consist of the following devices:
1) KeyBoard.
2) Mouse.
3) Scanner etc
Output Devices
All those devices which show the result are called output Devices. Output devices are used to communicate the results of data processed by the user. Output Devices consist of the following Devices:
1) Printer.
2) Speakers.3) Monitor.
4) Disk Drive (CD)
5) Flash Drive.
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System unit
System unit is the main part of the computer it is also known as Brain of computer. All the tasks are done in this unit. The system unit includes the Processor, Memory, Buses and ports, but does not include any peripheral devices. System unit only perform the following functions:
1) Arithmetic Logic Unit (A.L.U)
2) Control Unit (C.U)
3) Memory Unit (M.U)
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