| Subject | English | Arabic |
| dat.proc. | basic operating system | نظام التشغيل الأساسي |
| dat.proc. | disk operating system | نظام تشغيل قرصي دوس |
| dat.proc. | disk operating system | نظام التشغيل بالأقراص |
| comp., MS | MS-DOS operating system | نظام تشغيل MS-DOS (A Microsoft computer operating system with a command-line interface that is used to control many internal computer functions, such as running programs and organizing and maintaining files) |
| comp., net. | network operating system | نظام تشغيل الشبكة |
| comp., net. | network operating system | إختصار NOS |
| dat.proc. | operating system | نظام التشغيل |
| comp., MS | operating system | نظام تشغيل (The software that controls the allocation and usage of hardware resources such as memory, central processing unit (CPU) time, disk space, and peripheral devices. The operating system is the foundation on which programs are built) |
| auto.ctrl. | real-time operating system | نظام تشغيل فى الزمن الفعلى |