DEVELOPMENT OF COMPUTER EXTENDED IN PRESENT DAYS...

The development of personal computer has taken a long period of time to extend the use of computer at present days. So, it passed through a various stages to become this stage at present days. The world without computers is unimaginable. A small, relatively inexpensive computer designed for an individual user is known as personal computer. In price, personal computers range from hundred dollars to thousands of dollars and are based on the microprocessor technology that enables manufacturers to put an entire CPU on one chip. There are different types of computers according to their size. The smallest computer is micro computer where Personal computers also lie in this category and also popular to used as as personal. These computers are portable and can be use in personal life.

There were many ages in development of computer. Mainly there are three ages, age of mechanical calculators, age of electromechanical computers and age of electronic computers. The examples are Abacus, Slide rule, Pascal’s calculator, etc. The mechanical computers using electricity is known as electro mechanical computers. The examples are Mark-1, ABC, etc. And the computers which use the electronic devices in it are known as electronic computers. The examples are EDSAC, EDVAS, etc. The age of computer from electromechanical computers are also divided into different generations. The computer using vacuum tubes for circuitry and magnetic drums for memory having enormous size is known as first generation computers. They were very expensive, mechanical and used a great deal of electricity, generated a lot of heat, which often cause the malfunctions. E.g. MARK-1, UNIVAC, etc. the computers using the transistor are known as second generation computers. These computers still relied on punched cards for input and output. They moved from cryptic binary machine language to symbolic languages, which allowed programmers to specify instructions in words. High level programs were also developed in this time. E.g. IBM1401, ICL 2650 etc. the computers using IC know as third generation computers. Transistors were miniaturized and placed on silicon chips and were called as semiconductors. E.g. IBM 360, UNIVAC 9000 etc. the computers using microprocessor are known as fourth generation computers. The microprocessor brought the thousands of integrated circuits onto a single silicon chip. The personal computer also lies in this generation of computer. E.g. IBM PC, Pentium PC etc. are the some example of forth generation of computer.
People uses personal computer in different field. E.g. Business purpose like word processing, accounting, desktop, publishing, running etc. at home, the most popular use for personal computers is for playing games. People often use computers in home for drawing and painting pictures, designing pictures typing etc. due to smaller size it can be kept at any place of the home. It is also easy to use in comparison to other types of computer. No any special knowledge is required for it. People having basic knowledge and education can operate it easily. These types of computers are also as economical as compare to others. Thus, development of personal computers has extended the use of computer in present days.