| Subject | English | Lithuanian |
| comp., MS | Microsoft Disk Operating System | "Microsoft" diskinė operacinė sistema (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) |
| gen. | mobile operating system | mobilioji operacinė sistema |
| comp. | mobile operating system | mobiliųjų įrenginių operacinė sistema |
| comp., MS | MS-DOS operating system | MS-DOS operacinė sistema (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) |
| progr. | operating system | operacinė sistema (techninės ir programinės priemonės) |
| IT | operating system | programų sistema |
| comp., MS | operating system | operacinė sistema (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) |