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Input Unit
Data and instructions from the user are given by this unit. It consists of keyboard, mouse etc.
Output Unit
Processed data is given to the user by this unit. It consists of printer, monitor etc.
Storage Unit
All the data to be processed and instructions required for processing are stored in it. It also stores the intermediate and final results of processing before the results are released to output device.
Central Processing Unit
The Control Unit and Arithmetic Logical Unit of system are jointly known as CPU. It is the brain of the system.
Arithmetic Logical Unit
It is a place where actual execution of instructions takes place during processing of data. Computations of arithmetic (addition, division etc.) and logical (less than, equals, etc.) takes place in it.
Control Unit
It is able to maintain order and direct the operation of the entire system by selecting interpreting and seeing to the execution of program instruction. It controls the flow of information in the computer.
