Question

paragraph on early calculating device​

Answer 1

Early Calculating And Computing Machines: From The Abacus To Babbage

The Abacus

There is a long history detailing the invention of computing and calculating machines. The earliest recorded calculating device is the abacus. Used as a simple computing device for performing arithmetic, the abacus most likely appeared first in Babylonia (now Iraq) over 5000 years ago. Its more familiar form today is derived from the Chinese version pictured below.

The abacus is more of a counting device than a true calculator. (See Figure 1.) Nonetheless, it was used for centuries as a reliable means for doing additions and subtractions.