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

Free On-line Dictionary of Computing
computer dictionary
computing dictionary
Dictionary of Computing
FOLDOC
Free On-line Dictionary
this dictionary

     FOLDOC is a searchable dictionary of acronyms, jargon,
     programming languages, tools, architecture, operating
     systems, networking, theory, conventions, standards,
     mathematics, telecoms, electronics, institutions, companies,
     projects, products, history, in fact anything to do with
     computing.

     Copyright 1993 by Denis Howe

     Permission is granted to copy, distribute and/or modify this
     document under the terms of the GNU Free Documentation
     License, Version 1.1 or any later version published by the
     Free Software Foundation; with no Invariant Sections, Front-
     or Back-Cover Texts. A copy of the license is included in
     the section entitled "GNU Free Documentation License".

     Please refer to the dictionary as "The Free On-line
     Dictionary of Computing, http://www.foldoc.org/, Editor
     Denis Howe" or similar.

     The dictionary has been growing since 1985 and now contains
     over 13000 definitions totalling nearly five megabytes of
     text. Entries are cross-referenced to each other and to
     related resources elsewhere on the net.

     Where LaTeX commands for certain non-ASCII symbols are
     mentioned, they are described in their own entries. "\" is
     also used to represent the Greek lower-case lambda used in
     lambda-calculus. Cross-references to other entries look like
     this. Note that not all cross-references actually lead
     anywhere yet, but if you find one that leads to something
     inappropriate, please let the maintainer know. Dates after
     entries indicate when that entry was last updated. They do
     not imply that it was up-to-date at that time.