calculator
Noun

An expert at calculation (or at operating calculating machines) (synset 109906486)
hypernym: expert  a person with special knowledge or ability who performs skillfullyhyponym:
 adder  a person who adds numbers
 number cruncher  someone able to perform complex and lengthy calculations
 actuary, statistician  someone versed in the collection and interpretation of numerical data (especially someone who uses statistics to calculate insurance premiums)
 subtracter  a person who subtracts numbers

A small machine that is used for mathematical calculations;
Can be mechanical or electronic (synset 102942270)hypernym: machine  any mechanical or electrical device that transmits or modifies energy to perform or assist in the performance of human taskshyponym: abacus  a calculator that performs arithmetic functions by manually sliding counters on rods or in grooves
 adder  a machine that adds numbers
 adding machine, totaliser, totalizer  a calculator that performs simple arithmetic functions
 counter, tabulator  a calculator that keeps a record of the number of times something happens
 hand calculator, pocket calculator  a calculator small enough to hold in the hand or carry in a pocket
 napier's bones, napier's rods  a set of graduated rods formerly used to do multiplication and division by a method invented by John Napier
 quipu  calculator consisting of a cord with attached cords; used by ancient Peruvians for calculating and keeping records
 subtracter  a machine that subtracts numbers
synonym: calculating machine
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