- Types:
- show 9 types...
- hide 9 types...
-
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
-
pulse counter
an electronic counter that counts the number of electric pulses
