Abacus. The abacus is an early form of arithmetic calculator.

---

Size: 3328px × 4992px
Photo credit: © GUSTOIMAGES/SCIENCE PHOTO LIBRARY / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: abacus, accountancy, accounting, accounts, arithmetic, arithmetics, bead, beads, calculating, calculation, calculations, calculator, colour, colours, computing, counter, counting, early, equipment, frame, historical, history, mathematical, mathematics, technology