Computer can be defined as electronic machine which give various type of knowledge and information about education, economic, health and so on. There is also much type of hardware and software which helps to operate computer.

First of all, hardware refers to the physical elements of a computer. Examples of hardware in a computer are the keyboard, the monitor, the mouse and the processing unit. A computer's hardware is comprised of many different parts, but perhaps the most important of these is the motherboard.

Secondly, software, commonly known as programs, consists of all the electronic instructions that tell the hardware how to perform a task. For example, a program that is designed for the windows operating system will only work for that operating system. Practical computer systems divide software systems into three major classes:

In conclusion, we can say that computer is like basic need for human beings. We can see that there are computers almost everywhere in the developed and developing country. So we need to advance the computer in future.