Peter Cade / Getty Images An abacus is a calculation tool used by sliding counters along rods or grooves in order to perform mathematical functions. In addition to calculating the basic functions ...

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 ...

Superficially, the company’s first product, the AbacusBasic, looks like a keyboard. It’s actually a self-contained, low-cost PC that can undercut even the most basic laptop because of the lack of ...