The Evolution Of Computer

Introduction

Computer, machine that performs tasks, like calculations or electronic communication, under program. Programs usually lie within  the computer and are retrieved and processed by the Computer`s electronics. The Program Results are stored or taken out via output devices(like printer, speaker, compact disc). computer performs a wide variety of activities, accurately and quickly.

Digital computers

For all their apparent complexity, digital computers are basically simple machines. Every operation they perform, from navigating a spacecraft playing a game of chess, is based on one key operation: determining whether certain electronic switches, called gates, are opened or closed. the real power of a computer lie in the million-to 4 billion times, or cycles, per second.

A computer can recognize only two states in watch of its millions of circuit switches- on or off., or high voltage or low voltage. by assigning binary numbers to these states- 1 for on and 0 for off, for example- and linking many switches together, a computer can represent any type of data, from numbers to letters to musical notes. this process is called digitization.

Man Behind Computers

In 1939 the american physicists john V. Atanasoff and clifford berry produced the prototype of a computer based on the binary numbering system. Anatasoff reasoned that binary numbers were better suited to computing that were decimal numbers because the the two digits 1 and  0 could be represented the electrical circuits, which were either on or off. Furthermore, George Boole, a British mathematician, had already devised a complete system of binary algebra that might be applied to compute circuits. Developed in 1848, Boolean algebra bridged the gap between mathematics and logic by symbolizing all information as being either true or false. thus let to the invention of real digital and fast computers ever.