Computer
A computer, electronic computer (PC) - computer intended for transmission, storage and processing of information.
The term "computer" and the abbreviation "PC", adopted in the USSR, are synonymous. Currently, the phrase "electronic brain" displaced from domestic consumption. The abbreviation "PC" is mainly used as a legal term in legal documents, as well as in the historical sense - to refer to computer hardware 1940-80-ies. Also "CVM" - "digital computer".
With the help of computer algorithms capable of processing information on a particular algorithm. Any problem for the computer is a sequence of calculations.
Physically, the computer can operate by moving any mechanical parts, the motion of electrons, photons, quantum particles or by using the effects of any other physical phenomena.
Architecture of computers can simulate directly solve the problem, as close as possible (in the sense of mathematical description), reflecting the studied physical phenomena. Thus, electron beams can be used as models for modeling water flow dams or dams. Similarly designed analog computers were common in the 1960's, but today have become quite rare.
In most modern computers the problem, first described in a form they can understand (with all the necessary information is usually represented in binary form - in the form of ones and zeros, even though there were computers in the ternary number system), after which action to process it reduced to simple algebra of logic. Since virtually all of mathematics can be reduced to the Implementation of Boolean operations, a fairly fast electronic computer can be used to solve most math problems, as well as most of the tasks of information processing, which can be reduced to mathematics.
It was found that computers can not solve any mathematical problem. For the first time tasks that can not be solved with the help of computers, have been described by English mathematician Alan Turing.
Results of the tasks can be presented to the user by means of various input-output information, such as lamp indicators, monitors, printers, projectors, etc.
Novice users and especially children are often difficult to accept the idea that the computer - just a car and can not independently "think" or "understand" the words that he shows. The computer displays only mechanically defined program points, lines and colors using the I / O devices. The human brain itself recognizes shown certain images, numbers and words and gives them a certain value. More precisely, the main difference between the computer and the human brain - the ability to think abstractly, which has only the human brain, and, thanks to which man has reason. Among these include - creativity, imagination, reflection, self-learning, aesthetic appreciation, etc.