Mechanical Counting Devices: Examples for JSS1-3, History & More

From the simple abacus to the more complex Pascaline and slide rule, mechanical counting devices have played a vital role in human history.
From the simple abacus to the more complex Pascaline and slide rule, mechanical counting devices have played a vital role in human history.
Early counting devices were used before modern civilization to perform arithmetic operations such as addition, subtraction, multiplication and addition. Examples of early counting devices are fingers, pebble/ stones, cowries,, sticks, etc.