Feinghua

This unit contains devices with the help of which we enter data into the computer. This unit creates a link between the user and the computer. The input devices translate the information into a form understandable by the computer.

CPU

is considered as the brain of the computer.

CPU itself has the following three components

This unit consists of devices with the help of which we get the information from the computer. This unit is a link between the computer and the users. Output devices translate the computer's output into a form understandable by the users.

This unit can store instructions, data, and intermediate results. This unit supplies information to other units of the computer when needed. It is also known as an internal storage unit or the main memory or the primary storage or Random Access Memory (RAM).

This unit controls the operations of all parts of the computer but does not carry out any actual data processing operations.

ALU

ALU (Arithmetic Logic Unit) consists of two subsections namely,

 is to perform arithmetic operations like addition, subtraction, multiplication, and division. All complex operations are done by making repetitive use of the above operations.