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Analog Computers
Analog computers use electronic or mechanical phenomena to model the problem being solved by using one kind of physical quantity to represent another,
The analog computer excels in solving dynamic problems and simulating complex physical systems. It has no way for man-machine interaction, recording and graphic display. High-speed computing elements, used to simulate mathematical functions, physical systems, and dynamic processes,are arranged in as much the same pattem as the physical system they represent,
Early special-purpose analog computers were the slide rule, the curvimeter Ind plainmeter, and the harmonic analyzer, In World War II. analog computing mechanisms were of great importance for gunfire control on warships. Generalpurpose analog computers were first built in 19303,
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Digital Computers
Digital computers process data in numerical form using digital cineuils. The digital computers perform arithmetic and logic operations with discrete values. Digital computers are good. at solving algebraic equations and even better at manipulating numbers. It is unbeatable for highspeed precision in arithmetic operations, data storage, and documentation. It can perform only one calculation at a time,
The results can be obtained in a variety of forms, such as printed tables. magnetic tape, and the familiar punched cards. While properly used in high-accuracy high-volume numerical calculations, the digital computers are extremely good,
In early 19403, Aiken'built the first general-purpose digital computer called Mark-1 With the invention of digital computers. a new age of computing started Today digital computers are widely being used in business, educational institutes, hospitals etc. for various purposes. Examples of digital computers are IBM PC apple, s Macintosh computers etc,
