Introduction
Computer may be Special purpose computers and General purpose computer. Special purpose computers are designed to performs specific task and general purpose computers are versatile ,designed to perform various tasks .
Computers can be divided into different categories on the basis of processing speed, size and work.
On the basis of work
There are three types of computers on the basis of work. They are:
1 Analog computer
2 Digital computer
3 Hybrid computer
1. Analog computer:
Analog Computer is a computing device that works on continuous range of values. The analog computers give approximate results since they deal with quantities that changes continuously. It generally deals with physical variables such as voltage, pressure, temperature, speed, etc. ECG (Electro Cardio Graph) is an example of analog computer.
2. Digital computer: Our PC is a digital computer which operates on discrete data. Its operation is based on binary system. i.e. 0 and 1 digits. Digital Computers can give the results with more accuracy and at a faster rate. Digital computers are mostly used in different sectors for performing variety of jobs. They are able to save the data for future use also.
Supercomputer is the most powerful fastest, and also very expensive. It was developed in the 1980s. It is used to process large amount of data and to solve the complicated scientific problems. It can perform more than one trillion calculations per second. It has a large number of processors connected parallely. So parallel processing is done by this computer. In a single supercomputer, thousand of users can be connected at the same time and the supercomputer handle the work of each user separately. Supercomputers are mainly used for:
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