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  2. 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 ...

  3. O-ring - Wikipedia

    en.wikipedia.org/wiki/O-ring

    O-ring mounting for an ultra-high vacuum application. [11] Pressure distribution within the cross-section of the O-ring. The orange lines are hard surfaces, which apply high pressure. The fluid in the seams has lower pressure. The soft O-ring bridges the pressure over the seams. O-rings are available in various metric and inch standard sizes.

  4. Sinclair Scientific - Wikipedia

    en.wikipedia.org/wiki/Sinclair_Scientific

    The Sinclair Scientific Programmable, released a year later, was advertised as the first budget programmable calculator. Significant modifications to the algorithms used meant that a chipset intended for a four-function calculator was able to process scientific functions, but at the cost of reduced speed and accuracy. Compared to contemporary ...

  5. Monroe Systems for Business - Wikipedia

    en.wikipedia.org/wiki/Monroe_Systems_for_Business

    Monroe Systems for Business is a provider of electric calculators, printers, and office accessories such as paper shredders to business clients. [1] Originally known as the Monroe Calculating Machine Company, it was founded in 1912 by Jay Randolph Monroe as a maker of adding machines and calculators based on a machine designed by Frank Stephen Baldwin.

  6. Wills Ring - Wikipedia

    en.wikipedia.org/wiki/Wills_Ring

    A Wills Ring or Cooper Ring is a form of all-metallic O-ring seal. They are used for extremely arduous service, such as sealing the head gasket of high performance piston engines . Hollow, metallic Wills Rings are used as they have better springback than yielding soft metal seals and higher temperature limits than elastomer O rings.

  7. Sinclair Wrist Calculator - Wikipedia

    en.wikipedia.org/wiki/Sinclair_Wrist_Calculator

    The Wrist Calculator was launched in February 1977 by Sinclair Instrument, a company established in parallel to Sinclair Radionics when the latter started to encounter financial difficulties. [ 1 ] It was only available as a mail-order kit, and cost around £11 .

  8. 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 ...

  9. Sinclair Executive - Wikipedia

    en.wikipedia.org/wiki/Sinclair_Executive

    The Executive impressed the engineers at Texas Instruments, who had used the same chip to produce a longer and wider calculator that was over three times as thick and a great deal more expensive. [10] In 1974, sales of the Executive exceeded £2.5 million, and Sinclair was producing 100,000 calculators each month, of which 55% were exported. [11]

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