1. * CPU (Central Processing Unit ) * CPU is the abbreviation for central processing unit. the CPU is the brains of the computer where most numerical and logical calculations take place.

2. 64 Bits I3, i5, i7 Core 2 due Core due /Dual Core Pentium 4 3.00 GHz OR ABOVE 32 Bits Pentium 4 Pentium III Pentium II Pentium I 80486 DX4 80486 DX2 80486 80386 SX 80386 16 Bits 80286 AT 8088 XT 8086 XT 8 Bits 8085 8080 4 Bits 4004 CPU Family of Microprocessor CPU/Their Types

3. Block Diagram of CPU Memory Unit ALU (Arithmetic and Logical Unit) Control Unit ( CU) Input OutPut