5 of the Best Abacus Calculator Tools on Amazon (Both 4+1 and 5+2 Types)

In history, all the way back to 1503, Abacuses has been used by abacists in competitions up against physicists, worldly scholars and even computers. The result of these competitions has pretty much always gone to the abacist as the winner. As it has been proven many times throughout history, even today, that the abacus is faster than a modern calculator, owning one…