[dos] Chiefly British.
a place to sleep, especially in a cheap lodging house.
verb (used without object)
to sleep or lie down in any convenient place.

1775–85; origin obscure Unabridged


[daws, dos]
noun Computers.
any of several single-user, command-driven operating systems for microcomputers, especially MS DOS.

d(isk) o(perating) s(ystem) Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
DOS (dɒs)
n acronym for
disk-operating system, often prefixed, as in MS-DOS and PC-DOS; a computer operating system

doss (dɒs)
vb (often foll by down) (often foll by around)
1.  to sleep, esp in a dosshouse
2.  to pass time aimlessly
3.  a bed, esp in a dosshouse
4.  a slang word for sleep
5.  short for dosshouse
6.  a task or pastime requiring little effort: making a film is a bit of a doss
[C18: of uncertain origin]

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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American Heritage
Abbreviations & Acronyms
  1. denial of service

  2. Department of State

  3. disk operating system

The American Heritage® Abbreviations Dictionary, Third Edition
Copyright © 2005 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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