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  2. Calculator (Apple) - Wikipedia

    en.wikipedia.org/wiki/Calculator_(Apple)

    A calculator function has been included with iOS since its launch on iPhone [3] and iPod Touch. [4] However, iPads have never had a first-party calculator application, until the announcement of iPadOS 18 in 2024. A native calculator function was added to the Apple Watch with watchOS 6, which included a dedicated button for calculating tips. [5]

  3. Curta - Wikipedia

    en.wikipedia.org/wiki/Curta

    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.

  4. Pocket computer - Wikipedia

    en.wikipedia.org/wiki/Pocket_computer

    A pocket computer is a class of handheld computer characterized by very short displays (typically accommodating only one or a handful of lines of text) and calculator-style alphanumeric keypads. Pocket computers occupy a small footprint, allowing the unit to be comfortably stashed in one's pocket when on the go, and usually weigh less than 1 ...

  5. Comparison of HP graphing calculators - Wikipedia

    en.wikipedia.org/wiki/Comparison_of_HP_graphing...

    A graphing calculator is a class of hand-held calculator that is capable of plotting graphs and solving complex functions. While there are several companies that manufacture models of graphing calculators, Hewlett-Packard is a major manufacturer.

  6. Scientific calculator - Wikipedia

    en.wikipedia.org/wiki/Scientific_calculator

    Casio fx-77, a solar-powered digital calculator from the 1980s using a single-line LCD. A scientific calculator is an electronic calculator, either desktop or handheld, designed to perform calculations using basic (addition, subtraction, multiplication, division) and advanced (trigonometric, hyperbolic, etc.) mathematical operations and functions.

  7. iPhone 13 - Wikipedia

    en.wikipedia.org/wiki/IPhone_13

    The iPhone 13 and iPhone 13 Mini (stylized as iPhone 13 mini) are smartphones developed and marketed by Apple. They are the fifteenth generation of iPhones , succeeding the iPhone 12 and 12 Mini . They were unveiled at an Apple Event in Apple Park in Cupertino , California, on September 14, 2021, alongside the higher-priced iPhone 13 Pro and ...

  8. Calculator - Wikipedia

    en.wikipedia.org/wiki/Calculator

    By 1970, a calculator could be made using just a few chips of low power consumption, allowing portable models powered from rechargeable batteries. The first handheld calculator was a 1967 prototype called Cal Tech, whose development was led by Jack Kilby at Texas Instruments in a research project to produce a portable calculator. It could add ...

  9. Sharp EL-8 - Wikipedia

    en.wikipedia.org/wiki/Sharp_EL-8

    The EL-8 was much smaller, small enough to be used in one's hand: 164 mm (6.46 in) long, 102 mm (4.02 in) wide, and 70 mm (2.76 in) thick, and weighing 0.72 kg (1.59 lb) with batteries. [6] Although it was still too bulky to easily fit in a pocket, [ 1 ] it was an important step toward the development of the pocket calculator.