The Collaborative International Dictionary of English v.0.48:

Q \Q\ (k[=u]),
   the seventeenth letter of the English alphabet, has but one
   sound (that of k), and is always followed by u, the two
   letters together being sounded like kw, except in some words
   in which the u is silent. See Guide to Pronunciation, [sect]
   249. Q is not found in Anglo-Saxon, cw being used instead of
   qu; as in cwic, quick; cwen, queen. The name (k[=u]) is from
   the French ku, which is from the Latin name of the same
   letter; its form is from the Latin, which derived it, through
   a Greek alphabet, from the Ph[oe]nician, the ultimate origin
   being Egyptian.
   [1913 Webster] Etymologically, q or qu is most nearly related
   to a (ch, tch), p, q, and wh; as in cud, quid, L. equus,
   ecus, horse, Gr. ?, whence E. equine, hippic; L. quod which,
   E. what; L. aquila, E. eaqle; E. kitchen, OE. kichene, AS.
   cycene, L. coquina.
   [1913 Webster]

WordNet (r) 3.0 (2006):

Q
    n 1: the 17th letter of the Roman alphabet [syn: Q, q]

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

Q

    A very high level language by Per Bothner based
   on lazy generalised sequences.  Q has lexical scope, and
   some support for logic programming[?] and constraint
   programming.  The language includes small subsets of Common
   Lisp and Scheme.

   Q was a test-bed for programming language ideas.  Where APL
   uses arrays for looping, Q uses generalised sequences which
   may be infinite and may be stored or calculated on demand.  It
   has macros, primitives to run programs, and an
   interactive command language.

   Q is implemented in C++, and comes with an interpreter,
   compiler framework, libraries, and documentation.  It runs
   on Linux and SUN-4 and should work on any 32-bit Unix.

   (http://kelso.bothner.com/~per/software/#Q ).

   E-mail: Per Bothner .

   (2000-05-22)