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The original logo of ABAQUS company is a stylized abacus calculator, [6] and its beads are set to the company's official launch date of February 1, 1978 (2-1-1978). [ 12 ] External image
An abacus (pl. abaci or abacuses), also called a counting frame, is a hand-operated calculating tool which was used from ancient times in the ancient Near East, Europe, China, and Russia, until the adoption of the Hindu–Arabic numeral system. [1] An abacus consists of a two-dimensional array of slidable beads (or similar objects). In their ...
David Eugene Smith translated parts of the Treviso Arithmetic for educational purposes in 1907. Frank J. Swetz translated the complete work using Smith's notes in 1987 in his Capitalism & Arithmetic: The New Math of the 15th Century. Swetz used a copy of the Treviso housed in the Manuscript Library at Columbia University. The volume found its ...
c. 1000 — Pope Sylvester II introduces the abacus using the Hindu–Arabic numeral system to Europe. 1030 — Ali Ahmad Nasawi writes a treatise on the decimal and sexagesimal number systems. His arithmetic explains the division of fractions and the extraction of square and cubic roots (square root of 57,342; cubic root of 3, 652, 296) in an ...
Blaise Pascal invented a mechanical calculator with a sophisticated carry mechanism in 1642. After three years of effort and 50 prototypes [21] he introduced his calculator to the public. He built twenty of these machines in the following ten years. [22]
After 30 years of development, Thomas de Colmar launched the mechanical calculator industry by starting the manufacturing of a much simplified Arithmometer (invented in 1820). Aside from its clones, which started thirty years later, [ 38 ] it was the only calculating machine available anywhere in the world for forty years ( Dorr E. Felt only ...
The Arithmometer, invented in 1820 as a four-operation mechanical calculator, was released to production in 1851 as an adding machine and became the first commercially successful unit; forty years later, by 1890, about 2,500 arithmometers had been sold [16] plus a few hundreds more from two arithmometer clone makers (Burkhardt, Germany, 1878 ...
David Canfield Smith is an American computer scientist best known for inventing computer icons and the programming technique known as programming by demonstration. His primary emphasis has been in the area of human–computer interaction (CHI) design. His goal was to make computers easier for ordinary people to use.