WordNet (r) 3.0 (2006):

mod
    adj 1: relating to a recently developed fashion or style; "their
           offices are in a modern skyscraper"; "tables in
           modernistic designs"; [syn: mod, modern,
           modernistic]
    n 1: a British teenager or young adult in the 1960s; noted for
         their clothes consciousness and opposition to the rockers

Moby Thesaurus II by Grady Ward, 1.0:

37 Moby Thesaurus words for "mod":
   a la mode, advanced, all the rage, all the thing, avant-garde,
   contemporary, current, far out, fashionable, forward-looking, hip,
   in, in fashion, in style, in vogue, modern, modernistic,
   modernized, modish, new, newfashioned, now, popular, present-day,
   present-time, prevalent, progressive, smart, streamlined, trendy,
   twentieth-century, ultra-ultra, ultramodern, up-to-date,
   up-to-datish, up-to-the-minute, way out



V.E.R.A. -- Virtual Entity of Relevant Acronyms (February 2016):

MOD
       Magneto-Optical Disk (OD)


The Jargon File (version 4.4.7, 29 Dec 2003):

mod
 vt.,n.

    [very common]

    1. Short for ?modify? or ?modification?. Very commonly used ? in fact the
    full terms are considered markers that one is being formal. The plural
    ?mods? is used esp. with reference to bug fixes or minor design changes in
    hardware or software, most esp. with respect to patch sets or a diff.
    See also case mod.

    2. Short for modulo but used only for its techspeak sense.


The Free On-line Dictionary of Computing (30 December 2018):

mod

   1. 
   (module) The filename extension for a sampled music file
   format that originated on the Commodore Amiga.  A .MOD
   file is composed of digitised sound samples, arranged in
   patterns to create a song. There are .MOD players for most
   personal computers including Amiga, Archimedes, IBM
   PC, and Macintosh.

   An IBM PC will require a sound card capable of handling
   digitised samples (Sound Blaster, Sound Blaster Pro,
   GUS) and slower Intel 80386-based PCs may not be able to
   do anything else while playing a module.

   .MOD files differ from .MID (MIDI) files in that they
   contain sound samples.  This allows each song to use different
   sounds but it also puts more load on the CPU than playing a
   MIDI file, since more data must be processed for each note.  A
   slow CPU would benefit from a sound card with wavetable
   synthesis which handles samples instead of the CPU.

   Module files come in various formats including .MOD.  Formats
   evolved from .MOD include .S3M, .FAR and .669.  Most contain
   improvements on .MODs.

   (http://eskimo.com/~future/mods.htm).

   2.  modify or modification.

   This abbreviation is very common - in fact the full terms are
   considered formal.  "Mods" is used especially with reference
   to bug fixes or minor design changes in hardware or software,
   most especially with respect to patch sets or a diff.

   3.  A common name for the modulo operator.

   (1999-07-14)