MOTHERBOARD
It is also called main board or system board, the motherboard is a main circuit board that is the foundation of a computer and allows the CPU, RAM, and all other computer hardware components to function with each other.

CENTRAL PROCESSING UNIT (CPU)
The CPU also called brain of the computer system; CPU controls all the operation inside of computer. Currently, the Pentium processor is the most popular even though there are other chips available in the market today such as AMD, Motorola and others. CPU a small chip; it uses machine language. Language is used writing the program. There is basically two type’s language:

Low-Level language
High-Level language

The low-level language are consisting a Machine language and it is using binary digits 0 and 1. This language can computer directly understands. So there is no need of any translator for this language. But, High-level language is consisting C, C++, VB and Java; this language not a directly understands. So this language need a translator is called compiler and it convert high level language to machine level language. Note that in Java need both compiler and interpreter.

Computers use a form of digital information called binary information. Binary information uses only two digits, 0 and1. To represent a data, in binary system, each digit is called a bit. And group of 8 bit is called one byte. One byte is required to store one character. For example, show in figure binary communications between Hardware and Software.