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  2. TI-59 / TI-58 - Wikipedia

    en.wikipedia.org/wiki/TI-59_/_TI-58

    In the early model PC-100A, a switch inside the battery charger compartment allows use with the earlier SR-52 and SR-56 calculators as well as the TI-58/59 series. In addition, it also works with non-programmable TI machines of the era such as the SR-50A. (Remove the battery pack of a TI calculator and look for the row of printer interface pads ...

  3. Victor Technology - Wikipedia

    en.wikipedia.org/wiki/Victor_Technology

    9500 - The 9500 is a black 3.2 oz desktop calculator that uses LR1130 batteries. It has a selectable rounding switch and selectable decimal switch. This calculator also includes 3-key independent memory and is made with 50% recycled plastic. [19] 9700 - The 9700 is a black 9.6 oz desktop calculator with a 12 digit tilted LCD display. It has ...

  4. HP-19B - Wikipedia

    en.wikipedia.org/wiki/HP-19B

    Two common issues with the clamshell case were the plastic surrounding the battery door would break under pressure from the batteries; and the ribbon connecting the two keyboards would begin to fail after numerous case openings. The calculator included functions for solving financial calculations like time value of money, amortizing, interest ...

  5. HP-19C/-29C - Wikipedia

    en.wikipedia.org/wiki/HP-19C/-29C

    HP-19C calculator HP-29C with AC-powered battery charger. The HP-19C and HP-29C were scientific/engineering pocket calculators made by Hewlett-Packard between 1977 and 1979. They were the most advanced and last models of the "20" family (compare HP-25) and included Continuous Memory (battery-backed CMOS memory) as a standard feature.

  6. HP-41C - Wikipedia

    en.wikipedia.org/wiki/HP-41C

    The HP-41C series are programmable, expandable, continuous memory handheld RPN calculators made by Hewlett-Packard from 1979 to 1990. The original model, HP-41C, was the first of its kind to offer alphanumeric display capabilities.

  7. HP-10B - Wikipedia

    en.wikipedia.org/wiki/HP-10B

    The HP-10B (F1636A) is a student business calculator introduced in 1987. The model of this calculator proved to compete well with the higher end RPN HP-12C. Two versions of the 10B were produced, the first version came with orange lettering around the keys and used an 1LU7 HP Saturn processor, the later model (in 2000) with teal-green labels. [1]

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