FUNDAMENTALS OF COMPUTER

Detailed explanation-1: -The earliest known calculating device is probably the abacus. It dates back at least to 1100 bce and is still in use today, particularly in Asia. Now, as then, it typically consists of a rectangular frame with thin parallel rods strung with beads.

Detailed explanation-2: -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-3: -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-4: -Mesopotamian or Sumerian is one of the oldest human civilizations. The people of Sumerian civilization used the first abacus for counting. The old Babylonian scholars used their sexagesimal system in the abacus for mathematical functions like addition and subtraction.

Detailed explanation-5: -The name of the Chinese Abacus is Suanpan, which means calculating tray. It is 20 cm long and has more than seven rods. The hard wooden beads are arranged in two parts, there are two beads in each rod in the upper part and five beads in each rod in the bottom parts.