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  2. Ink ribbon - Wikipedia

    en.wikipedia.org/wiki/Ink_ribbon

    Ink ribbons are part of standard designs for hand- or motor-driven typewriters, teleprinters, stenotype machines, computer-driven printers, and many mechanical calculators. Thousands of varieties of ink ribbons and ribbon cartridges have been produced, and are available from stationery suppliers.

  3. Smith Corona - Wikipedia

    en.wikipedia.org/wiki/Smith_Corona

    Smith Corona is an American manufacturer of thermal labels, direct thermal labels, and thermal ribbons used in warehouses for primarily barcode labels.. Once a large U.S. typewriter and mechanical calculator manufacturer, Smith Corona expanded aggressively during the 1960s to become a broad-based industrial conglomerate with products extending to paints, foods, and paper.

  4. Oak leaf cluster - Wikipedia

    en.wikipedia.org/wiki/Oak_leaf_cluster

    The second ribbon counts as one additional award, after which more leaf clusters may be added to the second ribbon. If future awards reduce the number of oak leaf clusters worn on the first ribbon due to bronze oak leaf clusters being replaced by a silver oak leaf cluster, the second ribbon is removed and the appropriate number of devices is ...

  5. HP-19B - Wikipedia

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

    HP-19B, introduced on 4 January 1988, along with the HP-17B, HP-27S and the HP-28S, and replaced by the HP-19BII (F1639A) in January 1990, [2] was a simplified Hewlett Packard business model calculator, like the 17B.

  6. Adding machine - Wikipedia

    en.wikipedia.org/wiki/Adding_machine

    Blaise Pascal and Wilhelm Schickard were the two original inventors of the mechanical calculator in 1642. [1] For Pascal, this was an adding machine that could perform additions and subtractions directly and multiplication and divisions by repetitions, while Schickard's machine, invented several decades earlier, was less functionally efficient ...

  7. HP-35 - Wikipedia

    en.wikipedia.org/wiki/HP-35

    HP-35 calculators were carried on the Skylab 3 and Skylab 4 flights, between July 1973 and February 1974. [ 6 ] Is the first pocket calculator with a numeric range that covered 200 decades (more precise 199, ±10 ±99 ).

  8. TI SR-50 - Wikipedia

    en.wikipedia.org/wiki/TI_SR-50

    SR-50 (1974) Printed circuit board. Data code 035: 3rd week 1975. The SR-50 was Texas Instruments' first scientific pocket calculator with trigonometric and logarithm functions. . It enhanced their earlier SR-10 and SR-11 calculators, introduced in 1973, which had featured scientific notation, squares, square root, and reciprocals, but had no trig or log functions, and lacked other featur

  9. List of awareness ribbons - Wikipedia

    en.wikipedia.org/wiki/List_of_awareness_ribbons

    This is a partial list of awareness ribbons. The meaning behind an awareness ribbon depends on its colors and pattern. Since many advocacy groups have adopted ribbons as symbols of support or awareness, ribbons, particularly those of a single color, some colors may refer to more than one cause.

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