abacus
Sign in to savethumb|Bi-quinary coded decimal-like abacus representing
AI overview
I cannot write an accurate overview based on the provided context, as it only contains a fragment describing an image caption without substantive information about what an abacus is or why it matters. To write a faithful, accurate overview, I would need more complete source material.
AI-generated from the Wikipedia summary — may contain errors.
Key facts
- Chinese.t
- 算盤
- Chinese.s
- 算盘
- Chinese.l
- "calculating tray"
- Chinese.p
- suànpán
- Chinese.j
- syun3-pun4
- Chinese.y
- syun-pùhn
- Chinese.poj
- sǹg-pôaⁿ
- Chinese.tl
- sǹg-puânn
via Wikipedia infobox
Article
31 sectionsContents
- Etymology
- History
- Ancient Near East
- Mesopotamia
- Egypt
- Persia
- Europe
- Greece
- Rome
- Medieval Europe
- Russia
- East Asia
- China
- Japan
- Korea
- India
- Americas
- Mesoamerica
- Inca Empire
- Types
- School abacus
- Binary abacus
- Nano-abacus
- Neurological analysis
- Visually impaired users
- See also
- Notes
- Footnotes
- References
- Further reading
- External links
thumb|Bi-quinary coded decimal-like abacus representing
An abacus ( abaci or abacuses), also called a counting frame, is a hand-operated calculating tool which was used from ancient times, in the ancient Near East, Europe, China, and Russia, until largely replaced by handheld electronic calculators, during the 1980s, with some ongoing attempts to revive their use. An abacus consists of a two-dimensional array of slidable beads (or similar objects). In their earliest designs, the beads could be loose on a flat surface or sliding in grooves. Later the beads were made to slide on rods and built into a frame, allowing faster manipulation.