calculator

noun4

1. •
   A mechanical or electronic device that performs mathematical calculations; (now usually) an electronic one specifically.

   • The calculator on a bookkeeper's desk in the 1950s was an adding machine with mechanical guts.
   • I told him to hand me a calculator and he jokingly placed an adding machine at my side.
2. •
   (historical) A person who performs mathematical calculation.

   • During the war, his grandmother had worked at the Bletchley Park decoding station as a calculator.
3. •
   A person who calculates (in the sense of scheming).

   • He revealed himself to be a cold-blooded calculator out to sabotage his colleagues.
4. •
   (no longer used) A set of mathematical tables.