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  2. Comparison of Texas Instruments graphing calculators

    en.wikipedia.org/wiki/Comparison_of_Texas...

    The following table compares general and technical information for a selection of common and uncommon Texas Instruments graphing calculators. Many of the calculators in this list have region-specific models that are not individually listed here, such as the TI-84 Plus CE-T, a TI-84 Plus CE designed for non-French European markets.

  3. .44-40 Winchester - Wikipedia

    en.wikipedia.org/wiki/.44-40_Winchester

    The cartridge was originally sold as .44 Winchester. When the Union Metallic Cartridge Co. (UMC) began selling their own version of the cartridge, it adopted the name .44-40 (shorthand for .44 caliber and the standard load at the time of 40-grain (2.6 g) of black powder), as it

  4. Atari Calculator - Wikipedia

    en.wikipedia.org/wiki/Atari_Calculator

    During the interview, Shaw described more details about the Atari Calculator and the Colleen Calculator development. [49] [50] [51] On 4 September 2020, Savetz released on GitHub source files of the Colleen Calculator, recovered and reconstructed from scanned printouts. [40] [52] The header in source files includes info on the initial commit ...

  5. Mechanical calculator - Wikipedia

    en.wikipedia.org/wiki/Mechanical_calculator

    For 40 years, [58] the arithmometer was the only mechanical calculator available for sale and was sold all over the world. By 1890, about 2,500 arithmometers had been sold [ 59 ] plus a few hundreds more from two licensed arithmometer clone makers (Burkhardt, Germany, 1878 and Layton, UK, 1883).

  6. Curta - Wikipedia

    en.wikipedia.org/wiki/Curta

    The Curta was conceived by Curt Herzstark in the 1930s in Vienna, Austria.By 1938, he had filed a key patent, covering his complemented stepped drum. [3] [4] This single drum replaced the multiple drums, typically around 10 or so, of contemporary calculators, and it enabled not only addition, but subtraction through nines complement math, essentially subtracting by adding.

  7. Calculator - Wikipedia

    en.wikipedia.org/wiki/Calculator

    The first European-made pocket-sized calculator, DB 800 [43] [44] was made in May 1971 by Digitron in Buje, Croatia (former Yugoslavia) with four functions and an eight-digit display and special characters for a negative number and a warning that the calculation has too many digits to display.

  8. HP calculators - Wikipedia

    en.wikipedia.org/wiki/HP_calculators

    Smaller programmable model with programs up to 49 steps. Version HP-25C was first calculator with "continuous memory". HP-27S: 1988 The first HP pocket calculator to use algebraic notation only rather than RPN. It was a "do all" calculator that included algebraic solver like the HP-18C, statistical, probability and time/value of money ...

  9. .44 Colt - Wikipedia

    en.wikipedia.org/wiki/.44_Colt

    The ballistic performance of the original .44 Colt is comparable to the .44 Remington, and less powerful than modern .44 Russian loads. Cases for the modern .44 Colt-chambered handguns are typically made using trimmed .44 Magnum, .44 Special, or .44 Russian brass and a historically inaccurate .429 lead bullet. (As opposed to the older "heeled ...