Architecture

Contemporary computer put ALU and control units into a single integrated circuit known as the Central Processing Unit or CPU. Typically, the computer memory is placed in the top few small integrated circuits near the CPU. Tool which occupies most of the computer room is ancilliary system (for example, to provide electrical power) or instrument I / O.

Some larger computers differ from the above model in one main thing - they have multiple CPUs and control units working simultaneously. Moreover, several computers, used largely for research purposes and scientific computing, have differed significantly from the above model, but they have found little commercial use.

The function of the computer, in principle, is actually quite simple. Computer reaching the command and data from memory. Command conducted, the results are stored, and subsequent orders achieved. This procedure is repeated until the computer is turned off.