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MS DOS

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WordReference Random House Unabridged Dictionary of American English © 2026

MS DOS [Trademark.]

Computing, Trademarksa microcomputer operating system.

Also, MS-DOS

Collins Concise English Dictionary © HarperCollins Publishers::

MS-DOS / ɛmˈɛsˈdɒs/

a type of disk operating system

Etymology: 20th Century: from M(icro)s(oft), the company that developed it, + DOS

'MS DOS' also found in these entries (note: many are not synonyms or translations):

Forum discussions with the word(s) "MS DOS" in the title:

When you move from MS dos to Microsoft windows... how is this process called?

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