Abacus

related topics
{@card@, make, design}
{math, number, function}
{language, word, form}
{god, call, give}
{school, student, university}
{theory, work, human}
{country, population, people}
{system, computer, user}
{land, century, early}
{math, energy, light}
{day, year, event}
{mi², represent, 1st}

The abacus, also called a counting frame, is a calculating tool used primarily in parts of Asia for performing arithmetic processes. Today, abaci are often constructed as a bamboo frame with beads sliding on wires, but originally they were beans or stones moved in grooves in sand or on tablets of wood, stone, or metal. The abacus was in use centuries before the adoption of the written modern numeral system and is still widely used by merchants, traders and clerks in Asia, Africa, and elsewhere. The user of an abacus is called an abacist.[2]

Contents

Etymology

The use of the word abacus dates before 1387 AD, when a Middle English work borrowed the word from Latin to describe a sandboard abacus. The Latin word came from Άβακός abakos, the Greek genitive form of Άβαξ abax ("calculating-table"), from Hebrew ābāq (אבק), "dust".[3] The preferred plural of abacus is a subject of disagreement, with both abacuses[4] and abaci[5] in use.

Full article ▸

related documents
Flexagon
Pencil
Knot
Nunchaku
Printing
Denim
Savate
Leather
Dye-sublimation printer
Lumber
Wool
Loom
Acrylic paint
Technical drawing
Kendo
Parchment
Line printer
Screen-printing
Spear
Coin
Quilt
Electrical discharge machining
Paper clip
Origami
Martial arts
Kinder Surprise
Mace (club)
Drawn thread work
Horseshoe
Yarn