| Subject | English | German |
| comp. | disk operating system | DOS |
| comp. | disk operating system | plattenorientiertes Betriebssystem (auf Platte gespeichertes und auf die Plattenspeichernutzung orientierendes Betriebssystem) |
| microel. | disk operating system | Platten-Betriebssystem |
| microel. | disk operating system | Diskettenbetriebssystem |
| comp., MS | disk operating system | Betriebssystem (A generic term describing any operating system that is loaded from disk devices when the system is started or rebooted) |
| IT | disk operating system | MS-DOS |
| IT, el. | disk operating system | Plattenbetriebssystem |
| microel. | disk operating system | Plattenspeicherbetriebssystem |
| comp. | disk operating system | PBS |
| phys. | disk operating system DOS | Betriebssystem |
| comp. | microcomputer disk operating system | Mikrorechner-Diskettenbetriebssystem |
| tech. | tape disk operating system | Band-Platte-Betriebssystem |