COMPUTER FUNDAMENTALS

Detailed explanation-1: -The abacus, called Suan-Pan in Chinese, as it appears today, was first chronicled circa 1200 C.E. in China. The device was made of wood with metal re-inforcements. On each rod, the classic Chinese abacus has 2 beads on the upper deck and 5 on the lower deck; such an abacus is also referred to as a 2/5 abacus.

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

Detailed explanation-3: -The correct answer is a Mechanical calculator. It was the first mechanical calculator.

Detailed explanation-4: -So, the tablet is the first proper ancestor of the modern abacus. It was discovered as late as 1846 on the Island of Salamis. But, according to historians, it was used by the Babylonians around 300 BC, making it the oldest version of the abacus.