The two main categories of software are application software and also system software. The most usual kind of software application, application software application is a computer software plan that executes a certain function for a user, or in some instances, for an additional application. System software application sits in between http://tdcn.hou.edu.vn/index.php?language=vi&nv=statistics&nvvithemever=t&nv_redirect=aHR0cHM6Ly9zb2Z0d2FyZS10b29sLmNvbQ/ZD1wb2tkZW5ndGhhaS5vbmxpbm