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Computer is an electronic device that makes our work easier and has many things to do in it .. it has a CPU : central processing unit it is known as the brain of computer 
ALU: all the calculations are performed by ALU
CU: control unit controls all the functions of computer
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computer is a electronic machine. it consists of two main elements hardware and software.
Computer is an advanced electronic device that takes raw data as input from the user and process this data under the control of set of instructions (called program) and gives result (output ) and saves out put for the future use.

It can process both numerical and non-numerical value( arithmetic and logical)
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