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  • MS DOS
    MS DOS
    an operating system for personal computers, originally developed by Microsoft for IBM computers.
  • MS-DOS
    MS-DOS
    noun
    computing a type of disk operating system
Synonyms

MS DOS

American  
[em-es daws, -dos] / ˈɛmˌɛs ˈdɔs, -ˈdɒs /
Or MS-DOS
Trademark.
  1. an operating system for personal computers, originally developed by Microsoft for IBM computers.


MS-DOS British  
/ ɛmˈɛsˈdɒs /

noun

  1. computing a type of disk operating system

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Etymology

Origin of MS-DOS

C20: from M ( icro ) s ( oft ), the company that developed it, + DOS

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

See Examples For:

The smart move was that Gates gave IBM a really cheap deal but retained the right to sell the software to IBM's rivals as Microsoft MS DOS.

From BBC Feb. 5, 2014

The Xerox software is MS DOS based and utilizes off-the shelf programs such as Microsoft Windows and Wang Image Wizard.

From Library of Congress Workshop on Etexts by Library of Congress

But IBM did license its MS-DOS operating system for the 1981 PC, figuring it might sell 200,000 units over the life of the product.

From The Wall Street Journal Jan. 18, 2026

It reminded me of one of my all-time favorites, the MS-DOS game Where In The World Is Carmen Sandiego?.

From The Verge Jul. 14, 2022

Microsoft and Apple have their own disk formatting systems, but Apple can read MS-DOS, while Windows cannot read any Apple file systems.

From Washington Post Jul. 30, 2021

Thanks to the creators of DOSBox, I still get to enjoy the MS-DOS games I played 20 years ago that took up big portions of the 40-megabyte hard drive on my old 286 PC.

From Slate Jul. 24, 2017

The MS-DOS program | | is small, fast, and is superior for searches in DOS text files.|

From The Online World by De Presno, Odd

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