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  2. Difference engine - Wikipedia

    en.wikipedia.org/wiki/Difference_engine

    Babbage went on to design his much more general analytical engine, but later designed an improved "Difference Engine No. 2" design (31-digit numbers and seventh-order differences), [9] between 1846 and 1849. Babbage was able to take advantage of ideas developed for the analytical engine to make the new difference engine calculate more quickly ...

  3. File:Demonstration model of Babbage’s Difference Engine No 1 ...

    en.wikipedia.org/wiki/File:Demonstration_model_of...

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  4. Charles Babbage - Wikipedia

    en.wikipedia.org/wiki/Charles_Babbage

    Babbage began in 1822 with what he called the difference engine, made to compute values of polynomial functions. It was created to calculate a series of values automatically. By using the method of finite differences, it was possible to avoid the need for multiplication and division. [156] For a prototype difference engine, Babbage brought in ...

  5. 1822 in science - Wikipedia

    en.wikipedia.org/wiki/1822_in_science

    July 3 – Charles Babbage publishes a proposal for a "difference engine", a mechanical forerunner of the modern computer for calculating logarithms and trigonometric functions. Construction of an operational version will proceed under British Government sponsorship 1823–32 but it will never be completed. [1]

  6. Ninth Bridgewater Treatise - Wikipedia

    en.wikipedia.org/wiki/Ninth_Bridgewater_Treatise

    Seth Bullock argues that Babbage's description of his difference engine in the chapter on miracles is the first evolutionary simulation model. Babbage argues that the engine could be programmed to generate a series of numbers according to one law, then at a pre-defined point, this could switch to another law, leading to an apparent ...

  7. Divided differences - Wikipedia

    en.wikipedia.org/wiki/Divided_differences

    In mathematics, divided differences is an algorithm, historically used for computing tables of logarithms and trigonometric functions. [citation needed] Charles Babbage's difference engine, an early mechanical calculator, was designed to use this algorithm in its operation.

  8. Timeline of computing hardware before 1950 - Wikipedia

    en.wikipedia.org/wiki/Timeline_of_computing...

    To Babbage's delight, the Scheutzes completed the first full-scale difference engine, which they called a Tabulating Machine. It operated on 15-digit numbers and 4th-order differences, and produced printed output just as Babbage's would have. A second machine was later built in 1859 to the same design by the firm of Bryan Donkin of London. 1856

  9. Analytical engine - Wikipedia

    en.wikipedia.org/wiki/Analytical_Engine

    The analytical engine was a proposed digital mechanical general-purpose computer designed by English mathematician and computer pioneer Charles Babbage. [2] [3] It was first described in 1837 as the successor to Babbage's Difference Engine, which was a design for a simpler mechanical calculator. [4]