The Divisumma 24 is an electromechanical calculator that reflects the concepts of practicality and technological innovation. It was designed to quickly add, subtract, multiply and divide at 250 cycles per minute in sequence, with a 70 watt motor as a power source. Through its use a great variety of calculations can be made in a short time span and automatically. Each phase of a calculation and each result is printed by means of an inked ribbon in blue and red band on a roll of paper. In fact the mode of use is almost completely analogous to that of the current office calculators: possibility of performing the four operations, a single numeric keypad reduced to ten keys to set all the terms of the operation and print the results.
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