Source : Webster's Revised Unabridged Dictionary (1913)

Calculating \Cal"cu*la`ting\, a.
   1. Of or pertaining to mathematical calculations; performing
      or able to perform mathematical calculations.

   2. Given to contrivance or forethought; forecasting;
      scheming; as, a cool calculating disposition.

   {Calculating machine}, a machine for the mechanical
      performance of mathematical operations, for the most part
      invented by Charles Babbage and G. and E. Scheutz. It
      computes logarithmic and other mathematical tables of a
      high degree of intricacy, imprinting the results on a
      leaden plate, from which a stereotype plate is then
      directly made.

Source : WordNet®

calculating machine
     n : a small machine that is used for mathematical calculations
         [syn: {calculator}]