An abacus is an ancient tool used for counting, consisting of a framed set with rods on which balls or beads are moved. The abacus has been in existence in China since the second century BCE, although ...

In this section will be examined some calculating tools, used by mankind in the past 2000 years. Of course we will start with the abacus, the most famous and of longest use calculating tool.

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 centuries-old abacus, once a common tool in many countries, has now been abandoned around the world. But in Japan, thousands of students are still taught proficiency on the abacus. Advocates ...

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