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  2. Windows Calculator - Wikipedia

    en.wikipedia.org/wiki/Windows_Calculator

    A simple arithmetic calculator was first included with Windows 1.0. [5]In Windows 3.0, a scientific mode was added, which included exponents and roots, logarithms, factorial-based functions, trigonometry (supports radian, degree and gradians angles), base conversions (2, 8, 10, 16), logic operations, statistical functions such as single variable statistics and linear regression.

  3. Square number - Wikipedia

    en.wikipedia.org/wiki/Square_number

    if the last digit of a number is 4 or 6, its square ends in an odd digit followed by a 6; and; if the last digit of a number is 5, its square ends in 25. In base 12, a square number can end only with square digits (like in base 12, a prime number can end only with prime digits or 1), that is, 0, 1, 4 or 9, as follows:

  4. Sumlock ANITA calculator - Wikipedia

    en.wikipedia.org/wiki/Sumlock_ANITA_calculator

    ANITA Mk VIII. The ANITA Mark VII and ANITA Mark VIII calculators were launched simultaneously in late 1961 as the world's first all-electronic desktop calculators. [1] [2] Designed and built by the Bell Punch Co. in Britain, and marketed through its Sumlock Comptometer division, they used vacuum tubes and cold-cathode switching tubes in their logic circuits and nixie tubes for their numerical ...

  5. HP 35s - Wikipedia

    en.wikipedia.org/wiki/HP_35s

    For example, the principal square root of 9 is 3, which is denoted by √ 9 = 3, because 3 2 = 33 = 9 and 3 is nonnegative. However raising x to the power of 0.5 using the y x key works if the number is entered as a real number with a complex part equal to zero. [ 11 ]

  6. List of number theory topics - Wikipedia

    en.wikipedia.org/wiki/List_of_number_theory_topics

    Irrational number. Square root of two; Quadratic irrational; Integer square root; Algebraic number. Pisot–Vijayaraghavan number; Salem number; Transcendental number. e (mathematical constant) pi, list of topics related to pi; Squaring the circle; Proof that e is irrational; Lindemann–Weierstrass theorem; Hilbert's seventh problem; Gelfond ...

  7. Scientific calculator - Wikipedia

    en.wikipedia.org/wiki/Scientific_calculator

    The first scientific calculator that included all of the basic ideas above was the programmable Hewlett-Packard HP-9100A, [5] released in 1968, though the Wang LOCI-2 and the Mathatronics Mathatron [6] had some features later identified with scientific calculator designs.

  8. Mental calculation - Wikipedia

    en.wikipedia.org/wiki/Mental_calculation

    In other words, the square of a number is the square of its difference from 100 added to the product of one hundred and the difference of one hundred and the product of two and the difference of one hundred and the number. For example, to square 93: 100(100 − 2(7)) + 7 2 = 100 × 86 + 49 = 8,600 + 49 = 8,649

  9. Desktop Architect - Wikipedia

    en.wikipedia.org/wiki/Desktop_Architect

    Desktop Architect is a third-party replacement for the Desktop Themes control panel in Windows 95, 98, ME and 2000. It is also fully compatible with Windows XP and Vista. However, in Vista, the startup sound does not work, and the Network Neighborhood icon has to be changed manually. It is not known at this time if this program works with ...