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A partially disassembled Curta calculator, showing the digit slides and the stepped drum behind them Curta Type I calculator, top view Curta Type I calculator, bottom view. The Curta is a hand-held mechanical calculator designed by Curt Herzstark. [1] It is known for its extremely compact design: a small cylinder that fits in the palm of the hand.
The Little Professor was first released by Texas Instruments on June 13, 1976. [5] As the first electronic educational toy, [6] [7] the Little Professor is a common item on calculator collectors' lists. [8] In 1976, the Little Professor cost less than $20. More than 1 million units sold in 1977. [9]
An internal power struggle soon developed between Joseph Boyer and current President and General Manager Edmund G. Langhorne, who, upon losing took half of the employees with him to Universal Adding Machine, [7] also based in St. Louis. Joseph Boyer, the owner of the machine shop, then became president of the American Arithmometer Company in ...
Pascal's calculator (also known as the arithmetic machine or Pascaline) is a mechanical calculator invented by Blaise Pascal in 1642. Pascal was led to develop a calculator by the laborious arithmetical calculations required by his father's work as the supervisor of taxes in Rouen . [ 2 ]
In the early 1880s, Burroughs was advised by a doctor to move to an area with a warmer climate. He moved to St. Louis, Missouri where he worked in the Boyer Machine Shop. These new surroundings hastened the development of an existing idea: an adding machine. His new job gave him the opportunity to build his prototype.
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Little Man Computer simulator. The Little Man Computer (LMC) is an instructional model of a computer, created by Dr. Stuart Madnick in 1965. [1] The LMC is generally used to teach students, because it models a simple von Neumann architecture computer—which has all of the basic features of a modern computer.
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