Wednesday, 4 March 2015

what do you mean by digital computer and analog computer?which of these computers is used for accounting purposes?

TYPES OF COMPUTER

computer may be divided into three categories-digital, analog and hybrid. current use of the word computer always refers to the electronic digital computer which uses solid-state eletronic circuits.
1 digital computers, an its name indicated, a digital computer work with digital. in other works, a digital computer is a counting device. it accepts, processes and produces discrete data and computations are done with discrete quantities such as numerical digits. these computers obtain answers by counting and are very useful in business as they deal directly with the numbers involved in the processing of business data. as only simple arithmetic is involved in most of the business application, general purpose digital computers systems are sufficient for business houses.

2 Analog computers. the word analog derives its origin from the greek word analogy which means similarity of two quntities. these computers operate on the principle of creating a phsical analogy of mathematicl problems to be solved. these computers deal only with scientific measures. in essence, analog computers make measurements but not calculation. Examples of analog computers are slide rule (to measure distance).speedometer (to measure speed of an automobile) etc. OT obtains answered by measuring. therefore, there are mostly used in science and research because of its nobility to carry out complicated scientific and mathematical calculations at a great speed. it is difficult to use tees computers without the knowledge of advanced mathematical which is necessary for programming. as compared to digital computers, analog computers are slow and less accurate. they are designed for special application only.

3 Hybird computers. these computers combine the features of both digital and analog computers. this dual purpose system combines the measuring capabilities of the analog computer and the logical and control capabilities of the digital computers. hybird computers find applications in special areas only