Calculators

Abacus

500

Invented in 500 B.C. Used in China around 1300 A.D.

Mechanical calculator

Jan 1, 1623

William Schickard first invented the mechanical calculator that was unknown for 300 years

Circular slide rule

Jan 1, 1632

In 1632, the circular and rectangular slide rule was invented by W. Oughtred (1574-1660).

Pascaline

Jan 1, 1642

Blaise Pascal invented one the first calculators to help his father with taxes. Modification of Schickards design.

Arithmometer

Jan 1, 1820

Charles Xavier Thomas's invented the arithmometer

Electronical Calculator

Jan 1, 1885

William Seward Burroughs. Invented The Burroughs Adding Machine Company, founded in St. Louis, Missouri.

Millionare Calculator

Jan 1, 1893

Millionaire calculator introduced and invented by Leon Bollee,

Curta

Jan 1, 1948

Miniature hand-held mechanical calculator introduced. Invented by Curt Herzstark

Hand-held calculators

Jan 1, 1967

Electronic handheld calculator invented by Texas Instruments.

Teal Photon (Solar Powered Calculator)

Jan 1, 1978

first solar powered calculators invented by Teal Industries Incorporated, also known as Sharp.