The Calculators ClipArt gallery provides 9 of comptometers and other early mechanical calculating devices.
Used in businesses and bookkeeping, the adding machine was a device used for calculations. "One of the…
A calculating machine
A machine for adding and subtracting by mechanical means.
Felt Comptometer computing machine.
Leibnitz computing machine.
A calculator that performs simple arithmetic functions
This machine is used for multiplication, and division purposes. Multiplication is the mathematical operation…
Pascal computing machine.
A typewriter is a mechanical or electromechanical device with a set of "keys" that, when pressed, cause…