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On the basis of the usage of data computers can be classified as:Analog Computers, Digital Computers and Hybrid Computers.
Analog Computers: are in which numerical magnitudes are represented by physical quantities, such as electric current, voltage or resistance, mechanical movements etc. Analog computers accept data & then process it to produce analog data.
Digital Computers: A digital computer on data in the form of digits , rather than the physical quantities used in analog computers. That is , its input must be discrete rather than continuous & may consist of combination of numbers , characters & special symbols , written in appropriate programming language.
Classification of digital computers: General-purpose digital computer and pecial purpose digital computer.
General-purpose digital computer: This is also called all-purpose digital computer. It can be used for any type of application e.g.: Computers that are used for payroll, graphics, analysis etc.
Special purpose digital computer: These computers designed to solve problems of a restricted type i.e. designed to be especially efficient in a certain class of applications.
Hybrid Computers: Hybrid computer is the outcome of the integration of analog computer components & digital components. This integration is obtained by digital to-analog converter and analog to-digital converter.A hybrid computer may use or produce analog data or digital data.Hybrid Machines are generally used in scientific applications or in controlling industrial processes.
