DOS Definition

dŏs, dôs
noun

An operating system that resides on a disk.

Webster's New World

Plural form of do.

Wiktionary
Synonyms:
abbreviation
(computing, Internet) Denial of Service.
Wiktionary

(teaching) Director of Studies; someone in charge of the academic side of a school including training teachers and deciding course materials.

Wiktionary

Origin of DOS

  • d(isk) o(perating) s(ystem)

    From American Heritage Dictionary of the English Language, 5th Edition

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