Abacus

Credit: G.SHIELE,PUBLIPHOTO DIFFUSION/SCIENCE PHOTO LIBRARY

Caption: Abacus and fountain pen on a open accounts book. The abacus is an early form of arithmetic calculator.

Release details: Model release not required. Property release not required.

Keywords: abacus, accountancy, accounts, arithmetic, arithmetics, beads, book, calculation, calculator, computing history, counter, counting, early, equipment, figures, frame, historical, history, ink pen, mathematical, mathematics, pen, technology

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