CPU

* Brain of the computer

*Convert data(input) meaningful information (output)

*3 Main Subsystem

1. Arithmetic Logic Unit(ALU)-(responsible for arithmetic operations like addition, subtraction,multiplication and division.
>logic unit
logical operation of logic unit can test for three condition:
>equal to condition: less than condition and greater then condition
2. Control unit
 >checks the correctness of sequence of operation
> fetches program instruction from the primary storage unit, interpret them and ensure correct execution of the program.

3. Register

Output unit

Output Devices take the machine- coded output result from the CPU and convert them into a form that is easily readable by human being.

Monitor

Speaker

Projector

Printer

Buses

Bus-physically a set of wires. The components of the Computer are connected by these buses
>address BUS
>DATA BUS
>Control BUS

 ADDRESS BUS
> Address lines are used to provide the source of data for data bus

Data Bus
>Transferred via data bus

Control Bus
 Control the access of Data BUS and address bus