Abacus
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The abacus (plural abaci or abacuses), 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.
- See also: Wikipedia, Wiktionary, Wikisource, Commons
- Related: Abacus logic, Abacus system, Chisanbop, Napier's bones, Sand table, Slide Rule, Soroban, Suanpan
| Min Multimedia Min Multimedia www.minmm.com/minc/show_classes.php?id=273 - Web |
| Abacus in Various Number Systems Abacus in Various Number Systems www.cut-the-knot.org/blue/Abacus.shtml - Web |
| Java applet of Chinese, Japanese and Russian abaci Java applet of Chinese, Japanese and Russian abaci www.tux.org/~bagleyd/abacus.html - Web |
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| An atomic-scale abacus An atomic-scale abacus www.research.ibm.com/atomic/nano/roomtemp.html - Web |
| Examples of Abaci Examples of Abaci tinas-sliderules.me.uk/Slide%20Rules/Abaci.html - Web |
