DOS(redirected from DOS 4)
Also found in: Thesaurus, Medical, Legal, Financial, Encyclopedia.
Any of a family of operating systems that use command lines and were originally developed for personal computers made by IBM.
[d(isk) o(perating) s(ystem).]
n acronym for
(Computer Science) disk-operating system, often prefixed, as in MS-DOS and PC-DOS; a computer operating system
an operating system for microcomputers.
Department of State.
Switch to new thesaurus
|Noun||1.||DoS - the federal department in the United States that sets and maintains foreign policies; "the Department of State was created in 1789"|
executive department - a federal department in the executive branch of the government of the United States
Foggy Bottom - United States Department of State, which is housed in a building in a low-lying area of Washington near the Potomac River
Bureau of Diplomatic Security, DS - the bureau in the State Department that is responsible for the security of diplomats and embassies overseas
Foreign Service - the part of the State Department that supplies diplomats for the United States embassies and consulates around the world
|2.||DOS - an operating system that is on a disk|