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  2. HP 30 series - Wikipedia

    en.wikipedia.org/wiki/HP_30_series

    The HP-30 or Spice series are RPN Scientific hand-held calculators introduced by Hewlett ... As this calculator is regarded amongst the very good in terms of quality ...

  3. TI-30 - Wikipedia

    en.wikipedia.org/wiki/TI-30

    The original TI-30. The TI-30 is a scientific calculator manufactured by Texas Instruments, the first model of which was introduced in 1976.While the original TI-30 was discontinued in 1983 after several design revisions, TI maintains the TI-30 designation as a branding for its low and mid-range scientific calculators.

  4. HP 30b - Wikipedia

    en.wikipedia.org/wiki/HP_30b

    The HP 30b (NW238AA, variously codenamed "Big Euro", "Mid Euro" and "Fox" [1]) is a programmable [2] financial calculator from HP which was released on 7 January 2010. [3] The HP 30b is an advanced version of the HP's prior model HP 20b.

  5. Calculator added up to fun for a math phobic kid in the 1970s ...

    www.aol.com/calculator-added-fun-math-phobic...

    The Texas Instruments TI-30 retailed for $24.95 (about $130 today) and operated on a 9-volt battery. It had a red, eight-digit display and offered such functions as percents, constants, roots ...

  6. 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.

  7. Scientific calculator - Wikipedia

    en.wikipedia.org/wiki/Scientific_calculator

    TI's long-running TI-30 series being one of the most widely used scientific calculators in classrooms. Casio, Canon, and Sharp, produced their graphing calculators, with Casio's FX series (beginning with the Casio FX-1 in 1972 [9]). Casio was the first company to produce a Graphing calculator (Casio fx-7000G).

  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. Should I work one more year? - AOL

    www.aol.com/finance/does-one-more-really-matter...

    For example, using this calculator, you could estimate how long your retirement savings will last if you have $1.5 million in savings and a life expectancy of 95, assuming an average investment ...