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 abacus, a simple counting aid ... and predicting the motion of the stars and planets, is dated to the first century B.C. It was discovered off the coast of Greece in 1901.

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 ...

Abacus Life announced it has rebranded to Abacus Global Management, effective immediately. The new name better reflects the company’s expanded global presence and comprehensive ...

The Russian abacus (tchoty) is held so that counters move crosswise. It has no crossbar, and all counters in one row have the same value. Most rods have ten counters. An occasional row has fewer, to ...