Application Software Computer Information systems 204 Computer systems contain both hard and software. Hardware is any tangible item in a computer system, like the system unit, keyboard, or printer. Software, or a computer program, is the set of instruction that direct the computer to perform a task. Software falls into one of two categories: system software and application software. System software controls the operation of the computer hardware; whereas, application software enables a user to perform tasks. Three major types of application software on the market today for personal computers are word processors, electronic spreadsheets, and database management systems