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  2. Sharp QT-8D - Wikipedia

    en.wikipedia.org/wiki/Sharp_QT-8D

    The four ICs of the QT-8D and QT-8B were also used as the basis of the Sharp EL-8, one of the first mass-produced hand-held electronic calculators, introduced in 1971. [ 1 ] Sharp also built OEM versions of the QT-8D for the Swedish office machine company Facit and its subsidiary Addo , which sold them as the Facit 1115 and the Addo-X 9354 .

  3. Calculator Here We GO! - Wikipedia

    en.wikipedia.org/wiki/Calculator_Here_We_GO!

    The first truly pocket-sized electronic calculator was the Busicom LE-120A "HANDY", which was marketed early in 1971. [42] 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 ...

  4. Aiken code - Wikipedia

    en.wikipedia.org/wiki/Aiken_code

    The Aiken code (also known as 2421 code) [1] [2] is a complementary binary-coded decimal (BCD) code. A group of four bits is assigned to the decimal digits from 0 to 9 according to the following table. The code was developed by Howard Hathaway Aiken and is still used today in digital clocks, pocket calculators and similar devices [citation needed].

  5. Victor Technology - Wikipedia

    en.wikipedia.org/wiki/Victor_Technology

    1100-3A - The 1100-3A is a black and grey/gray 3.2 oz. desktop calculator made with 50% recycled plastic and has a 10 digit angled LCD display. It has 3-key independent memory and tax keys. [11] 1180-3A - The 1180-3A is a 4.8 oz black desktop calculator with a 12 digit angled LCD display. It is made with 40% recycled plastic and it has cost ...

  6. Sinclair Scientific - Wikipedia

    en.wikipedia.org/wiki/Sinclair_Scientific

    The code to normalize and display the computed values is roughly the same in the TI and Sinclair programs. [ 4 ] The design of the algorithms meant that some calculations, such as arccos 0.2, could take up to 15 seconds, whereas the HP-35 was designed to complete calculations in under a second. [ 4 ]

  7. Sharp EL-8 - Wikipedia

    en.wikipedia.org/wiki/Sharp_EL-8

    The Sharp EL-8, also known as the ELSI-8, [1] was one of the earliest mass-produced hand-held electronic calculators [1] and the first hand-held calculator to be made by Sharp. Introduced around the start of 1971, [ note 1 ] it was based on Sharp's preceding QT-8D and QT-8B compact desktop calculators and used the same logic circuits, but it ...

  8. Sumlock ANITA calculator - Wikipedia

    en.wikipedia.org/wiki/Sumlock_ANITA_calculator

    ANITA Mk VIII. The ANITA Mark VII and ANITA Mark VIII calculators were launched simultaneously in late 1961 as the world's first all-electronic desktop calculators. [1] [2] Designed and built by the Bell Punch Co. in Britain, and marketed through its Sumlock Comptometer division, they used vacuum tubes and cold-cathode switching tubes in their logic circuits and nixie tubes for their numerical ...

  9. Sinclair Sovereign - Wikipedia

    en.wikipedia.org/wiki/Sinclair_Sovereign

    With an eight-digit display, the calculator could display positive numbers between 0.0000001 and 99,999,999, and negative numbers between -0.000001 and -9,999,999. [12] Calculators of the time tended to have displays of between 3 and 12 digits, as reducing the number of digits was an effective way of reducing the cost of the calculator.

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