DOS

from WordNet (r) 3.0 (2006)

DoS
    n 1: the federal department in the United States that sets and
         maintains foreign policies; "the Department of State was
         created in 1789" [syn: {Department of State}, {United
         States Department of State}, {State Department}, {State},
         {DoS}]
    2: an operating system that is on a disk [syn: {DOS}, {disk
       operating system}]

from The Free On-line Dictionary of Computing (8 July 2008)

DOS

   <operating system> 1. The common abbreviation for {MS-DOS}.

   2. {IBM}'s {Disk Operating System}.

   3. Any {disk operating system}.

   (2001-03-16)

from V.E.R.A. -- Virtual Entity of Relevant Acronyms (June 2006)

DOS
       Denial Of Service [attack], "DoS"

from V.E.R.A. -- Virtual Entity of Relevant Acronyms (June 2006)

DOS
       Disk Operating System (OS, IBM, MS, ..., PC, Apple, RCA Spectra
70)

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