About 418,000 results
Open links in new tab
  1. Abacus - Wikipedia

    Abacus-based mental calculation (AMC), which was derived from the abacus, is the act of performing calculations, including addition, subtraction, multiplication, and division, in the mind by manipulating …

  2. Abacus | Definition, History, Origin, & Facts | Britannica

    Nov 17, 2025 · Abacus, calculating device, probably of Babylonian origin, that was long important in commerce. It is the ancestor of the modern calculating machine and computer. The abacus was in …

  3. How to Use an Abacus (with Pictures) - wikiHow

    Aug 6, 2025 · The abacus (the suanpan is the most useful variety) is a deceptively simple calculating tool still used all over the world. It's a useful learning device for the visually impaired, as well as for …

  4. Abacus Explained — Everything You Need To Know - History-Computer

    May 23, 2025 · While not technically a computer, the abacus is known as the first calculating tool. It’s also one of the first inventions that led to the first computer, credited to Charles Babbage in 1822.

  5. Abacus - New World Encyclopedia

    An abacus (plurals abacuses or abaci), also called a counting frame, is a calculating tool for performing arithmetical processes, often constructed as a wooden frame with beads sliding on wires.

  6. What Is an Abacus? - Computer Hope

    Sep 7, 2025 · Meaning of the abacus, a mechanical device for performing mathematical calculations, its history, usage today, benefits of learning it, and usage instructions.

  7. ABACUS Definition & Meaning - Merriam-Webster

    Probably of Babylonian origin, an abacus is a calculating instrument that uses beads that slide along a series of wires or rods set in a frame to represent the decimal places. It is the ancestor of the modern …

  8. Abacus - Math.net

    An abacus, also referred to as a counting frame, is a device used to perform calculations. Abaci (or abacuses) can be used to teach arithmetic, perform practical calculations, and more.

  9. Abacus: Definition, Uses, and Its Role Today - Investopedia

    Nov 1, 2025 · What Is an Abacus? Both a historical and modern tool, an abacus is a calculation tool used by sliding counters along rods or grooves in order to perform mathematical functions.

  10. The Abacus and the Numeral Frame - Smithsonian Institution

    The abacus is a computing device on which arithmetic calculations are performed by sliding counters (beads, pebbles, or flat discs) along rods, wires or lines. The instrument may have originated in the …