Block Diagram of Computer


Block Diagram of Computer

Block diagramis a diagram of a system in which the principal parts or functions are represented by blocks connected by lines that show the relationships of the blocks

The computer performs basically five major operations of functions irrespective of their size and make. These are

1) it accepts data or instruction by way of input,

2) it stores data,

3) it can process data as required by the user,

4) it gives results in the form of output, and

5) it controls all operations inside a computer. We discuss below each of these operations.


Input Device : Input device is use to input raw data in computer (e.g. Keyboard, Scanner, plotter)

Control Unit (CU): The process of input, output, processing and storage is performed under the supervision of a unit called ‘Control Unit’. It decides when to start receiving data, when to stop it, where to store data, etc. It takes care of step-by-step processing of all operations in side the computer.

Memory Unit: Computer is used to store data and instructions.

Arithmetic Logic Unit (ALU): The major operations performed by the ALU are addition, subtraction, multiplication, division, logic and comparison.

Output: This is the process of producing results from the data for getting useful information.










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