FUNDAMENTALS OF COMPUTER

Detailed explanation-1: -Abacus was the first counting machine. Earlier it was fingers, stones, or any various kinds of natural material. It was widely in use in different countries from the Middle East to Japan, China, Russia as well as Europe.

Detailed explanation-2: -Ancient Mesopotamians of Sumeria invented Abacus between and BC.

Detailed explanation-3: -The first tool created specifically for use in mathematical computations was the abacus, likely invented in Sumeria around 2500 B.C. The abacus was a table of successive columns with beads or stones representing a single unit, which could be used for addition or subtraction.

Detailed explanation-4: -The abacus (plural abaci or abacuses), also called a counting frame, is a calculating tool which has been used since ancient times. It was used in the ancient Near East, Europe, China, and Russia, millenia before the adoption of the Hindu-Arabic numeral system. The exact origin of the abacus has not yet emerged.

Detailed explanation-5: -The abacus is one of many counting devices invented in ancient times to help count large numbers, but it is believed that the abacus was first used by the Babylonians as early as 2, 400 B.C.1 The abacus was in use in Europe, China, and Russia, centuries before the adoption of the written Hindu-Arabic numeral system.