Computer is an electronic device that can receive a set of instructions called program and then carry out them. The modern world of high technology could not be possible without computers. Different types and sizes of computers find uses throughout our society. They are used for the storage and handling of data, secret governmental files, information about banking transactions and so on....

Computer addicts are the minority of computer users but there is no doubt that more and more young people are computer literate. Computer studies is a subject in many schools and many young people have personal computers. About one in three hundred computer owners spend almost all their time using computers....