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  2. Sharp EL-8 - Wikipedia

    en.wikipedia.org/wiki/Sharp_EL-8

    [1] [7] The operation and performance of the EL-8 are identical to its predecessor calculators, the QT-8D and QT-8B, because its logic circuits use the same set of four Rockwell-manufactured large-scale integrated circuits. [1] [2] [8] Likewise, its keyboard has the same layout, including the combined ×÷ key, [1] [2] and it also uses magnetic ...

  3. Sharp QT-8D - Wikipedia

    en.wikipedia.org/wiki/Sharp_QT-8D

    Previous electronic calculators had been about the size of a typewriter and had logic circuits built from numerous discrete transistors and diodes or small- to medium-scale ICs. [1] The QT-8D's logic circuits were packed into just four LSI ICs. [3] The QT-8D was released in Japan at a price of 99,800 Japanese yen, a new low for electronic ...

  4. Calculator input methods - Wikipedia

    en.wikipedia.org/wiki/Calculator_input_methods

    The simplest example given by Thimbleby of a possible problem when using an immediate-execution calculator is 4 × (−5). As a written formula the value of this is −20 because the minus sign is intended to indicate a negative number, rather than a subtraction, and this is the way that it would be interpreted by a formula calculator.

  5. Symbolab - Wikipedia

    en.wikipedia.org/wiki/Symbolab

    Symbolab is an answer engine [1] that provides step-by-step solutions to mathematical problems in a range of subjects. [2] It was originally developed by Israeli start-up company EqsQuest Ltd., under whom it was released for public use in 2011. In 2020, the company was acquired by American educational technology website Course Hero. [3] [4]

  6. HP 35s - Wikipedia

    en.wikipedia.org/wiki/HP_35s

    For example, adding 12 + 34i and 56 + 78i involved the following keystrokes: 3 4 ↵ Enter 1 2 ↵ Enter 7 8 ↵ Enter 5 6 CMPLX +, which used up all four stack levels. [17] The 35s stores complex numbers as single values, which can then be operated on in the standard ways. The above example of adding 12 + 34i and 56 + 78i then becomes: 1 2 i 3 ...

  7. Desmos - Wikipedia

    en.wikipedia.org/wiki/Desmos

    The tool comes pre-programmed with 36 different example graphs for the purpose of teaching new users about the tool and the mathematics involved. [ 15 ] As of April 2017, Desmos also released a browser-based 2D interactive geometry tool, with supporting features including the plotting of points, lines, circles, and polygons.

  8. Category:Electronic calculators - Wikipedia

    en.wikipedia.org/.../Category:Electronic_calculators

    Electronic calculators by company (10 C, 2 P) G. Graphing calculators (1 C, 39 P) P. Programmable calculators (7 C, 27 P) Pages in category "Electronic calculators"

  9. SAT solver - Wikipedia

    en.wikipedia.org/wiki/SAT_solver

    In computer science and formal methods, a SAT solver is a computer program which aims to solve the Boolean satisfiability problem (SAT). On input a formula over Boolean variables, such as "(x or y) and (x or not y)", a SAT solver outputs whether the formula is satisfiable, meaning that there are possible values of x and y which make the formula true, or unsatisfiable, meaning that there are no ...