The Collaborative International Dictionary of English v.0.48:

Calculator \Cal"cu*la*tor\, n. [L.: cf. F. calculateur.]
   One who computes or reckons: one who estimates or considers
   the force and effect of causes, with a view to form a correct
   estimate of the effects.
   [1913 Webster]

         Ambition is no exact calculator.         --Burke.
   [1913 Webster]

WordNet (r) 3.0 (2006):

calculator
    n 1: an expert at calculation (or at operating calculating
         machines) [syn: calculator, reckoner, figurer,
         estimator, computer]
    2: a small machine that is used for mathematical calculations
       [syn: calculator, calculating machine]

The Free On-line Dictionary of Computing (19 January 2023):

bitty box
calculator

    (Or "calculator") /bit'ee boks/ A computer
   sufficiently small, primitive, or incapable as to cause a
   hacker acute claustrophobia at the thought of developing
   software on or for it.  The term is especially used of small,
   obsolescent, single-tasking-only personal computers such
   as the Atari 800, Osborne, Sinclair, VIC-20, TRS-80
   or IBM PC, but the term is a general pejorative opposite of
   "real computer" (see Get a real computer!).

   See also mess-dos, toaster, toy.

   (1994-11-29)


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

calculator
 n.

    Syn. for bitty box.