Evolution of computers have been drastically and dramatically. Computers are in existence in the early 1950s, but the people were not able to use them. If you use the word computer, most people only think of the desktop computer, but in reality start computer with our computer.

Therefore, a computer can be defined as an electronic device, the input, process and output information. Let's take the case of a calculator, while adding numbers, eg 1 +1 = 2, nowYou will input data, which is 1 +1, this data will be processed by addition, to us 2 Now 2 is the processing of information that is output.