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Combination of many ICs is called microprocessor. A microprocessor can compute data logical decision and store data. The data, either or non-numeric, called instruction are given to a microprocessor through a device known as input. The instruction is processed by a control unit and is sent to a decoder. The Arithmetic logic unit (ALU) of the microprocessor does all mathematical operation and makes logical decisions. The output data is sent to a device known as output device. The output and the input data are stored in the memory unit of the microprocessor.
C.P.U
CPU is the central processing unit. It is the most important part of the computer and thus is generally referred to as the heart of it. This unit comprises three sub units. They are controlled by unit (C.U), memory unit(M.U) and arithmetic logic unit (ALU), control unit controls the entire performs the operation according to the instruction given.
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