Both main groups of software are software and system software. An application is software that satisfies a details requirement or does jobs. System software is developed to run a computer's hardware and also supplies a platform for applications to run on top of. The 2 primary categories of software program http://history.lib.ntnu.edu.tw/wiki/index.php/%E4%BD%BF%E7%94%A8%E8%80%85:Software01Tools