Input Unit


It accepts data and instructions from the external environment.

Then it converts the data and instruction to machine-readable form.

Then it stores the converted data and instructions to the storage unit for further processing.


Storage Unit

The data and instruction received from the input device get stored inside it.

•This data will remain there until and unless it gets processed.

•After processing, the result also remains in the storage unit it gets to display.

 The storage unit is of two types:- Primary memory and Secondary memory.


Primary memory stores data for the short term whereas secondary memory stores for the long term.


Central Processing Unit (CPU)


After input and storage of data processing of data takes place and it is done by CPU.

 The CPU processes the data according to the instruction provided.

So, we can say that the CPU is the brain of the computer.

The arithmetic and logic unit(ALU) and Control Unit(CU)  are the two major components of the CPU.


Arithmetic and Logic Unit(ALU)


This is a part of the CPU and it performs basic mathematical calculations like addition and subtraction.

It can also do some logical operations like comparison.



Control Unit(CU)

The Control Unit is the backbone of any computer system.

It manages and coordinates the operations of all other components of the computer system.


It takes the data from the input device and sends it for processing and also

 further, transfer it to the output unit.


Output Unit

The Output Unit is the final component of the Computer.

The output unit receives the processed data and converts it to a human-readable format.

Then it supplies the converted result to the output device so that we can see it.