Abacus (disambiguation)

An abacus is a counting frame.

Abacus may also refer to:

• Mental abacus, mental calculation method inspired by the abacus
• Logical abacus, an early mechanical digital computer
• Abacus (architecture), a flat slab forming the uppermost member or division of the capital of a column
• Abacus checkers, a two-player Chinese game played on a Suanpan abacus
• Abacus Harmonicus, an ancient diagram showing the structure and placement of the keys of a particular musical instrument
• as (part of) a proper name
  • Abacus (GDS), a global distribution system used in travel
  • Abacus (journal), a peer-reviewed academic journal
  • Abacus, an imprint of Little, Brown and Company
  • Abacus, a Zagat-rated restaurant in Dallas, Texas, owned by chef Kent Rathbun
  • Abacus Software, a producer of payware add-ons for Microsoft Flight Simulator
  • Abacus 5, an action sports manufacturing and distribution company headquartered in Shanghai
  • Abacus Records, an imprint of Century Media Records
  • Abacus school, a type of Renaissance-era Italian trade school
  • Abacus Federal Savings Bank, an overseas Chinese bank in the United States
  • Abacus-2007AC1, a financial instrument and the subject of SEC v. Goldman Sachs, et al. (2010)
  • Operation Abacus, the Canadian military operation to restore vital services if the year 2000 caused disruption
  • Abacus–Australian Mutuals, the industry body representing the credit unions, building societies and mutual banks that constitute the Australian mutual or cooperative banking sector
  • Abacus (band), a heavy metal band formed in 2005 from northern Ontario, Canada.