Who developed the Abacus? September 22, 2012 by Pamela Landy · Filed Under: Inventions The abacus was probably invented by the Babylonians. It was refined and used by the Romans, Chinese, Arabs, Europeans, and Asians as late as the seventeenth century. It is still used, in various forms, in the Middle East and Japan. Related PostsHow was the inch developed?Who developed the lobotomy?Who developed Cinerama?When was the first educational aptitude test developed in America?Who developed the first system of writing in Cherokee?