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 represents the earliest known computational device in that it incorporates the four central components of computational devices. (1) A structure serving as the representational medium. I the abacus the rods and beads serve as the structure.

Detailed explanation-3: -Pascaline, also called Arithmetic Machine, the first calculator or adding machine to be produced in any quantity and actually used.

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, centuries before the adoption of the Hindu-Arabic numeral system.

Detailed explanation-5: -The first calculating device that was invented was the Abacus. It is a manual calculating device that consists of rows of beads representing a place of value and digits. The abacus was invented by Blaise Pascal in the year 1642.