1. Input: this is the
process of entering data and programs into the computer system.
Input unit Output unit
Memory Unit
Control Unit
Arithmetic
Logic Unit
2. 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.
3. Memory Unit: Computer
is used to store data andinstructions.
4. Arithmetic Logic Unit (ALU): The
major operations performed by the ALU are addition, subtraction,multiplication,
division, logic and comparison.
5. Output: This
is the process of producing results from the data for getting useful
information. The ALU and the CU of a computer system are jointly known as
the
central processing unit (CPU). You may call CPU as the brain of any computer
system.
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