The two main categories of software program are application software program and also system software application. The most typical type of software, application software program is a computer system software application package that performs a specific feature for an individual, or in some situations, for another application. System software program http://history.lib.ntnu.edu.tw/wiki/index.php/%E4%BD%BF%E7%94%A8%E8%80%85:Toolx9