Honestly, the abacus history is debatable to some extent. It was so widely used that at one point near the 16th and 18th centuries, most business transactions by merchants and shopkeepers were done using the abacus calculator. This wonderful Chinese invention first traveled through Korea to Japan and Taiwan, then to Russia, and other parts of the world. They used stones instead of beads to move up and down the carved rows to calculate. Some communities also carved sections on a wooden surface and divided them into vertical and horizontal rows to calculate using this method. In the olden times, people used sticks, pebbles, and different seeds as an abacus. These dots/points are called House/Decimal points in an Abacus. There are little dots that appear on every third rod in a soroban/suanpan, which helps track your calculations. Similarly, the beads on the rods of lower deck are lower beads. If the abacus has two decks, then, the beads on the rods of the upper deck are upper beads. Beadsīeads are the little bi-conical shapes in the counting device made with wood, metal, or (previously) wool and pebbles. The bar is the horizontal rod in a suanpan or soroban that divides the vertical rods and makes two sections in the devices: upper deck and lower deck. Similarly, a rekenrek also has horizontal rods, but only two in number. The rods hold the beads in a counting frame and make the device appear divided into rows.Ī regular modern suanpan has 7 to 23, 27, or 31 (any odd number) vertical rods, and the current abacus model (Danish abacus) has 10 horizontal rows. However, the modern-day abacus used in most schools is made with a wooden frame. But a modern-day Japanese abacus has a metallic frame. Both the Chinese and Japanese abaci were made with wooden frames.
But beginning with the Chinese version, we have a proper frame. The old versions were made by carving sections on wood. FrameĪ frame is the outer body of the counting device that holds together the other parts, such as the beads and the rods. In this section, I will tell you about its different parts. While the earliest models were counting boards, the modern models are counting frames. An abacus is basically a counting device.
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