DOS

See also DoS

See also dos

Pronunciation

• enPR: dŏs
• IPA: /dɒs/
• SAMPA: /dQs/

Acronym

Acronym DOS

Singular DOS

Plural none

1. (countable & uncountable) Disk Operating System:
   1. (old, no longer used) Any computer operating system that is stored on a disk and read into memory.

      They began developing DOS's in the 1970's.

   2. A group of operating systems that include PC-DOS, Microsoft DOS (MS-DOS), and others that look and work the same way.

      Windows replaced DOS in the '90's.

      DR-DOS is a real DOS with complete open source code.

Usage notes

• "DOS" is used as both a proper noun and a common noun.

Initialism

Initialism DOS

1. (military) Date(s) of Service
2. (military) Date of Separation
3. (US) Department of State
4. (science) Density of states