The two main categories of software application are application software and system software. The most usual kind of software program, application software program is a computer software plan that does a particular function for a customer, or in some cases, for an additional application. System software application sits in between http://myduc.edu.vn/index.php?language=vi&nv=news&nvvithemever=d&nv_redirect=aHR0cHM6Ly9zb2Z0d2FyZS10b29sLmNvbS45