The system software of a computer consists of a collection of operative programs whose purpose is to make the use of the computer more effective. The customer who buys a computer would usually receive, in addition to the hardware, any available software needed for the effective operation of his computer. A computer without some kind of system software would be very ineffective and most likely impossible to operate.
The production of system programs is a complex task requiring extensive knowledge and specialized training in computer science. System programs offer several advantages and conveniences to application programs and computer users in general.