From Abacus to Computer: The History of Computing Machines
- Grades: PreK–K, 1–2, 3–5
Start your tour at The Abacus, and learn a little bit about the world's first computer. This simple device was invented in China around 500 B.C., and was also used by the ancient Japanese and the Aztecs. The abacus is still used today by schoolchildren around the world — in fact, you've probably used one yourself! At this site, you can try adding, subtracting, multiplying, and dividing online using several different models of abaci.