The processor used in microcomputer is called Microprocessor. Microprocessor is used in microcomputer designed in a single chip and fits into a special socket on the motherboard. The most important part of the motherboard is the microprocessor chip. In PC two types of microprocessors are used. These are:

I) Intel Microprocessor

This microprocessor made by Intel Corporation is commonly used in microcomputers. Actually the Microsoft Windows OS is developed to run on Intel microprocessor. Intel microprocessors names are Pentium, Pentium Pro, Pentium II (P2), Pentium III (P3), Pentium IV (P4), Core 2 Due (C2D) etc.Today the most advanced microprocessor chip of Intel is Core 2 Duo.

ii) Motorola Microprocessor

Motorola microprocessor is made by Motorola. It is used in PC of Apple. Macintosh OS is developed to run on Motorola microprocessor.

Coprocessor

A coprocessor is a unique additional processor chip that helps the processor of a computer in performing particular tasks. The math-coprocessor is an example of coprocessor. In advanced computer math-coprocessor is particularly used to perform very large and tricky mathematical calculations. It is used for engineering, scientific and graphic applications.