| Word | Description |
| Operating System | also abbreviated as OS. An Operating System is a software program or set of programs that mediate access between physical devices (such as a keyboard, mouse, monitor, disk drive or network connection) and application programs (such as a word processor, World-Wide Web browser or electronic mail applications). Some popular operating systems are: Unix, Linux, Windows XP, and Mac OSX. In HISD, we are currently using Windows XP and 2000. |