| Subject | English | Romanian |
| comp. | mobile operating system | sistem de operare portabil |
| comp., MS | MS-DOS operating system | sistem de operare 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., MS | operating system | sistem de operare (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) |
| construct. | operating system | sistem operațional |