Computers are machines which can accept data s electronic in a certain form, process the data and give the results of the processing in a specified format as information.
Three basic steps are involved in the process. First, data is fed into the computer's memory. Then, when the program is run, the computer performs a set of instructions and processes the data. Finally, we can see the results(the output) on the screen or in printed form.
Information in the form of data and programs is known as software, and the electronic and mechanical parts that make up a computer system are called hardware. Astandard computer system consists of three main sections: the central processing unit(CPU), the main memory and the peripherals.