Abacus, or counting frame

Abacus (architecture), a flat slab forming the uppermost member or division of the capital of a column

Abacus Records, an imprint of Century Media Records

Abacus Federal Savings Bank, an overseas Chinese bank in the United States.

Abacus system, mental calculation method

Abacus logic, a logic equivalent to the mathematical abacus

Abacus 5, an action sports manufacturing and distribution company that is based out of Shanghai, China

Operation Abacus, the Canadian military operation to restore vital services if the year 2000 caused disruption.

Abacus Harmonicus, an ancient diagram which showed the structure and placement of the keys of a particular musical instrument.