classification of computer with respect to size and advancement of technology
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Updated: July 10, 2017 Written/composed/compiled by: dakshu
In this post we are discussing about Classification of Computers based on various aspects such as brand, size, application of computers, technology used and so on.
In digital computers, mathematical expressions are represented as binary digits (0 and 1) and all operations are done using these digits at a very high rate. It means that the computer operates on electrical inputs that have only two states, ON and OFF. These computers are widely used in commercial and control systems. Nowadays when we use the word computer, we mostly refer to a digital computer.
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Classification of Computers
In this chapter, we will look at classification of computers – the different types of computers based on different aspects.
Since the first computer, there are different types of computers. Some are to do specific task and some for general purpose – do everything a program can make it to do. Some computers work with continuous signals of the physical quantities such as pressure, temperature, speed, current etc. and some with discrete data or the digital signals. Some computers are really huge in size while others are as tiny that fit in our pockets and palm. There are computers from different companies that work totally different and some work similar to others. So, in this class we’ll try to identify the classes on which each computer can be grouped into – the classification of computers.
Classification of computers based on application
We can identify three different classes if we look upon how a computer works or what they are applied for – Analog, Digital and Hybrid computers.
Analog Computer
An analog computer is a form of computer that uses the continuously-changeable aspects of physical phenomena such as electrical, mechanical, or hydraulic quantities to model the problem being solved. These computers are used in Hospitals, Air-crafts and so on.
An analog computer can be mechanical analog computer or electronic analog computer. (There can be a confusion that electronic computers are digital but note that there are electronic analog computers too!)
Mechanical analog computers have existed for thousands of years, with the oldest known example being the Antikythera. This is a Greek machine, thought to have been made around 100 BC, designed for calculating astronomical positions. A more recent and common mechanical analog computer is the slide rule.