History of Computers

The history of computers, and the history of computers in education 500 BC Evidence of the abacus, the world’s first calculating machine, exists from as far back as 2,500 years ago in the Tigris-Euphrates Valley. The earliest form of the abacus is a stone or clay tablet that uses pebbles for counting. Grooves are carved into the tablet and pebbles, representing numbers, are placed in these grooves. The pebbles can slide along the grooves from one side of the tablet to the other, thus allowing for easier counting. The abacus also helps ancient peoples perform simple calculations such as addition and subtraction.