French Blaise Pascal invented the calculator. He did this to help his dad who was a tax adjuster. ... We tend to take a cheap hand held calculator for granted. They're easy to use and it's hard

William Seward Burroughs invented the first practical calculator - the history of calculators. ... Blaise Pascal invented the first digital calculator to help his father with his work collecting taxes.

Blaise Pascal - French scientist and mathematician invented the first digital calculator. ... it was also about this period that he invented the arithmetical triangle, and together with Fermat created

Willhelm Schickard invented the "Calculating Clock", the first mechanical calculator.

The hand-held pocket calculator was invented at Texas Instruments, Incorporated (TI) in 1966 by a development team which included Jerry D. Merryman, James H. Van Tassel and Jack St. Clair Kilby.

One is of Wilhelm Schickard who invented a mechanical calculator in 1623. Apparently only two prototypes were built and their location is unknown (if they survived at all).

In 1967, a team at Texas Instruments revolutionized the world. Their invention? The first handheld electronic calculator.

Three years later, the third Earl of Stanhope invented a multiplying calculator, but it was not until 1820 that a mass-produced calculator, Thomas de Colmar's Arithmometer, was successfully marketed.

The Curta Calculator simulation is a 3D re-creation of the original portable mechanical calculator, invented by Curt Herzstark.

Jack Kilby from Texas Instruments decides to build a hand-held calculator based on the Integrated Circuits invented by him in 1959. (8) (10) (12)