| Subject | English | Thai |
| comp., MS | Microsoft Windows operating system | ระบบปฏิบัติการ Microsoft Windows (A proprietary software operating system with a graphical user interface (GUI)) |
| comp., MS | MS-DOS operating system | ระบบปฏิบัติการ 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 | ระบบปฏิบัติการ (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) |
| comp., MS | operating unit | หน่วยปฏิบัติงาน (An organization that divides the control of economic resources and operational processes among people who have a duty to maximize the use of scarce resources, to improve processes, and to account for their performance) |