Explain the classification of computers.
Computers are classified into 3 broad categories basing on – type, purpose, capacity.
Type :
Analog computers : These are measuring devices that work on volatile data. Eg. Heat, pressure, humidity, speed etc. Eg. Thermometers, barometers, speedometers. These are sensitive to slightest changes.
Digital computers : Deal with numbers; can be used to manipulate data with great accuracy. Take input and give out put. Can store large quantities of data. Eg. All electronic computers, calculators, quartz watches etc.
Hybrid computers : Mixture of analog and digital computers. Input is generally in the form of analog form like heat/pressure etc., measured by analog part of computer and then used by digital part for further operations. Eg. Computers used in factories for controlling manufacturing processes, launching a rocket etc.
Purpose :
General Purpose computers : Capable of handling many kinds of operations. Used for both business and scientific applications with equal efficiency. Can be used at any place like offices, banks, schools etc.
Special Purpose computers : Designed to perform specific task and can not be used for other purposes. Eg. Monitor patient’s health in hospitals, in airports to monitor arrival/departure of flights etc.,
Capacity :
Super computers : Very large in size with very high processing speeds having more number of processing units. These are generally used for complex scientific computations / purposes.
Main Frame Computers : These are large computer systems having capability to support more powerful peripheral devices and terminals.
Micro computers : Micro computer is the smallest category of computers consisting of micro-processor and associated storage and input/output devices.
Mini Computers : Relatively fast but small and inexpensive as compared to Main frame computers. A mini computer can support 10 to 12 terminals.
Personal computers : Designed for personal use. Several models are available in the market. These are very widely used and seen everywhere. Today these are available with very high processing speed and large storage capacity at affordable prices.
