Who Invented Abacus?
Abacus was invented by Chinese in 500 BC (while some indications argue on its invention by Babylonians in 300 BC) and was used as one of the most primitive calculators (or counting device to be precise). The first century sources have also given evidence on abacus being used by Indians with a separate column that counted digits with ‘shunya’ (zero). Although, the history still searches for facts that can give a confirmed statement on the invention of abacus.
The Salamis tablet (300 BC) used by Babylonians circa is considered to be the ancestor of abaci. Then came the Roman and Greek abaci, which had different orientation and presentation, but same functionality. Different ages brought different changes in the forms
of abaci as its usage was adapted by races from China, India, Korea, Persia, Rome, Japan and Russia.
The Suanpan, one of the modern age abaci which was a Chinese abacus had 2/5 decks and due to its complexity was replaced by Soroban abacus, a Japanese abacus, which was developed further by a famous mathematician Seki Kowa who removed one bead each from upper and lower decks to make it 1/4 decks.