FUNDAMENTALS OF COMPUTER

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: -Mesopotamian. Mesopotamia or Sumerian civilization was one of the oldest civilizations in human history. Between 2700bc to 2300 bc, Sumerian used the first abacus to count. It is the belief that Old Babylonian scholars have used this abacus to do addition and subtraction.

Detailed explanation-3: -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.

Detailed explanation-4: -The Chinese abacus, also known as the suanpan (/, lit. “calculating tray"), comes in various lengths and widths, depending on the operator. It usually has more than seven rods. There are two beads on each rod in the upper deck and five beads each in the bottom one.

Detailed explanation-5: -It was called Chu Pan [5, 30a, 30b], which marked the initial prototype of the Chinese abacus. Its origin was in the later part of the Chou Dynasty between the sixth and third centuries B.C. The rectangular tray was chess-board-like, divided into squares which had ten rows horizontally and as many columns as necessary.