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  2. HP-71B - Wikipedia

    en.wikipedia.org/wiki/HP-71B

    A HP-71 configuration with bar code wand and a custom application was widely used for data collection in the British Department of Health and Social Security (DHSS). Unlike HP-75 or HP-41 , the 71B could also act as a device in a HP-IL loop controlled by another device, allowing several of them in the same loop, communicating with each other ...

  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. Category:Mental calculators - Wikipedia

    en.wikipedia.org/wiki/Category:Mental_calculators

    Download as PDF; Printable version; In other projects Wikimedia Commons; ... Robert Fountain (mental calculator) Thomas Fuller (mental calculator) G. Rüdiger Gamm ...

  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. Calculator - Wikipedia

    en.wikipedia.org/wiki/Calculator

    Made in Japan, this was also the first calculator to use an LED display, the first hand-held calculator to use a single integrated circuit (then proclaimed as a "calculator on a chip"), the Mostek MK6010, and the first electronic calculator to run off replaceable batteries. Using four AA-size cells the LE-120A measures 4.9 by 2.8 by 0.9 inches ...

  7. HP 35s - Wikipedia

    en.wikipedia.org/wiki/HP_35s

    The calculator may be set to automatically display values as mixed fractions by toggling the FDISP key. The maximum denominator may be specified using the /c function. Numbered flags may be set to specify which of three denominator systems is to be used: most precise denominator, factors of the maximum (for example 2, 4, 8, 16, when the maximum ...

  8. HP-65 - Wikipedia

    en.wikipedia.org/wiki/HP-65

    The HP-65 is the first magnetic card-programmable handheld calculator. Introduced by Hewlett-Packard in 1974 at an MSRP of $795 [ 1 ] (equivalent to $4,912 in 2023) [ 2 ] , it featured nine storage registers and room for 100 keystroke instructions.

  9. AOL Mail

    mail.aol.com

    Get AOL Mail for FREE! Manage your email like never before with travel, photo & document views. Personalize your inbox with themes & tabs. You've Got Mail!