The Personal Computer(PC) is although the most popular computer system although the most popular computer system,there are other computer systems too,which are categorized on the basis of size,cost and Performance.Before we describe some of these computer systems,it is essential to understand the term system.A system is a group of integrated parts that have a common purpose of achieving an objective.Following are the various categories of computers.
Personal Computer or Microcomputers
The microcomputer is also known as PC.The most popular form of the computer in use today is probably the PC.The PC can be used for various applications and,in fact,there size but capable of handling large tasks.It can perform a diverse range of functions,from keeping track of household accounts to keeping records of the stores of a large manufacturing company.The most widespread example is the IBM PC,Hewlett Packard and DELL,based on microprocessors from intel corporation,PS/2 and Apple's Macintosh.
Minicomputers
A popular computer system is in the minicomputer,which is a small,general-purpose computer.It can vary in size from a small desktop model to the size of a small filing cabinet.A typical mini system is more expensive than a PC and surpasses it in storage capacity and speed.
Supercomputer
At the end of the size and capability scale are the supercomputers.These systems are the largest,fastest and the most expensive computers in the world.They are used for Bio-medical research,weather forecasting,chemical analysis in laboratory,complex scientific,and defence applications.BlueGene/l System is now the world's fastest supercomputer.It is a joint development of IBM and DOE's national Nuclear Security Administration and installed at DOE's Lawrence National Laboratory in Liver more.
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