FUNDAMENTALS OF COMPUTER

Detailed explanation-1: -For many thousands of years, people have counted things using their fingers and toes. At least 25, 000 years ago, people also began making tally marks, marks on a stick or stone tablet to record numbers. Tally marks are still used today by many people, maybe even you!

Detailed explanation-2: -The Greco-Roman author Plutarch, in his Lives, mentions finger counting as being used in Persia in the first centuries CE, so the practice may have originated in Iran. It was later used widely in medieval Islamic lands.

Detailed explanation-3: -Left and right hand Numbers less than 100 were shown with the fingers of one hand, from 100 to the other. In this way, up to 10, 000 could be counted with both hands. Probably smaller numbers were presented using the left hand, while the larger ones were shown using the right hand.

Detailed explanation-4: -Rather than counting fingers, the Egyptians counted the joints on each of the four fingers on a hand and there are three joints per finger giving twelve joints on a hand.

Detailed explanation-5: -Instead of counting on their fingers and toes, ancient bookkeepers used the segments of their fingers to count, tapping the sections between joints with their thumb. Four fingers with 3 segments between the joints made 12.