What happen if I will remove all calculators, laptops and other electronics gadgets from the world? It is difficult to imagine counting without these tools but there was a time when even written numbers did not exist. If I talk about counting device it was limited to human hands and fingers. Then when they moved to larger quantities then various natural items like pebbles, rocks and twigs were used. At that point of time trading was very difficult because the merchants who traded goods not only require a way to count goods bought and sold but also to calculate the cost of the same. Till the time numbers were invented, counting devices were used to make everyday calculations. The Abacus is one of the counting devices invented to count large numbers.
It is really important to distinguish the early abacus (abaci) known as counting board from the modern abaci. The counting board is a piece of wood stone or any metal with painted lines between which beads or metal discs were moved. The abacus is a device, usually made of woods, having frame that holds rods with freely sliding beads.
Even both the abacus and the counting board are mechanical aids used for counting; they are not calculators. The person who operates the abacus performs calculations in his head and uses the abacus as a physical aid to keep track of numbers and carry.
In such a way abacus was used for calculations so many years. As it is used by both hands and calculations done mentally it becomes the most important tool for developing brain strength in today’s world. With the help of abacus you can put gradually pressure on your brain too.