#calculating_machine__calculatingmachine__calculator  a small machine that is used for mathematical calculations
  supertype:  #machine  any mechanical or electrical device that transmits or modifies energy to perform or assist in the performance of human tasks
  subtype:  #abacus  a calculator that performs arithmetic functions by manually sliding counters on rods or in grooves
  subtype:  #adder  a machine that adds
  subtype:  #adding_machine__totalizer__totaliser  a calculator that performs simple arithmetic functions
  subtype:  #tabulator__counter  a calculator that keeps a record of the number of times something happens
     subtype:  #pulse_counter__pulsecounter  an electronic counter that counts the number of electric pulses
        subtype:  #scaler  an electronic pulse counter used to count pulses that occur too rapidly to be recorded individually
  subtype:  #hand_calculator__pocket_calculator  a calculator small enough to hold in the hand or carry in a pocket
  subtype:  #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
  subtype:  #quipu  calculator consisting of a cord with attached cords; used by ancient Peruvians for calculating and keeping records
  subtype:  #subtracter  a machine that subtracts

No statement uses or specializes #calculating_machine; click here to add one.