FUNDAMENTALS OF COMPUTER

Detailed explanation-1: -abacus, plural abaci or abacuses, calculating device, probably of Babylonian origin, that was long important in commerce. It is the ancestor of the modern calculating machine and computer.

Detailed explanation-2: -Homo sapiens, the first modern humans, evolved from their early hominid predecessors between 200, 000 and 300, 000 years ago. They developed a capacity for language about 50, 000 years ago. The first modern humans began moving outside of Africa starting about 70, 000-100, 000 years ago.

Detailed explanation-3: -There is archaeological evidence suggesting that humans have been counting for at least 50, 000 years. Counting was primarily used by ancient cultures to keep track of social and economic data such as the number of group members, prey animals, property, or debts (that is, accountancy).

Detailed explanation-4: -How early humans kept count. Early humans in the Paleolithic age likely counted animals and other everyday objects by carving tally marks into cave walls, bones, wood or stone. Each tally mark stood for one and each fifth mark was scored through to help keep track.