The Ancient Romans developed the Roman hand abacus, a portable, but less capable, base-10 version of earlier abacuses like those that were used by the...

g. 1⁄2, 1⁄4, and 1⁄12 in Roman abacus), and a decimal point can be imagined for fixed-point arithmetic. Any particular abacus design supports multiple...

M. 1965. "Roman numerals and the abacus." Classica et medievalia 26: 147–60. "Roman Numerals (Totally Epic Guide)". Know The Romans. Roman numerals at...

and the Roman abacus. The abacus, which used Roman numerals, was ideally suited to the counting of Roman currency and tallying of Roman measures.[citation...

In architecture, an abacus (from the Ancient Greek ἄβαξ (ábax), 'slab'; or French abaque, tailloir; pl.: abacuses or abaci) is a flat slab forming the...

spelled suan pan or souanpan) is an abacus of Chinese origin, earliest first known written documentation of the Chinese abacus dates to the 2nd century BCE during...

The use of counting rods is one example. The abacus was initially used for arithmetic tasks. The Roman abacus was developed from devices used in Babylonia...

The soroban (算盤, そろばん, counting tray) is an abacus developed in Japan. It is derived from the ancient Chinese suanpan, imported to Japan in the 14th century...

Greece – Roman technology Roman abacus – Roman agriculture – Roman calendar – Cement / concrete – Corvus (ship's weapon) – Ancient Roman cranes – Roman engineering...

Abacus school is a term applied to any Italian school or tutorial after the 13th century, whose commerce-directed curriculum placed special emphasis on...