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  2. History of PDF - Wikipedia

    en.wikipedia.org/wiki/History_of_PDF

    From 1993 to 2006 Adobe Systems changed the PDF specification several times to add new features. Various aspects of Adobe's Extension Levels published after 2006 were accepted into working drafts of ISO 32000-2 (PDF 2.0), but developers are cautioned that Adobe's Extensions are not part of the PDF standard.

  3. Graphing calculator - Wikipedia

    en.wikipedia.org/wiki/Graphing_calculator

    The ability to create games and utilities has spurred the creation of calculator application sites (e.g., Cemetech) which, in some cases, may offer programs created using calculators' assembly language. Even though handheld gaming devices fall in a similar price range, graphing calculators offer superior math programming capability for math ...

  4. Calculator - Wikipedia

    en.wikipedia.org/wiki/Calculator

    An electronic pocket calculator with a seven-segment liquid-crystal display (LCD) that can perform arithmetic operations A modern scientific calculator with an LCD. An electronic calculator is typically a portable electronic device used to perform calculations, ranging from basic arithmetic to complex mathematics. The first solid-state ...

  5. Map - Wikipedia

    en.wikipedia.org/wiki/Map

    Physical map of Earth Political map of Earth. A map is a symbolic depiction emphasizing relationships between elements of some space, such as objects, regions, or themes.. Many maps are static, fixed to paper or some other durable medium, while others are dynamic or interactive.

  6. Color rendering index - Wikipedia

    en.wikipedia.org/wiki/Color_rendering_index

    Researchers use daylight as the benchmark to which to compare color rendering of electric lights. In 1948, daylight was described as the ideal source of illumination for good color rendering because "it (daylight) displays (1) a great variety of colors, (2) makes it easy to distinguish slight shades of color, and (3) the colors of objects around us obviously look natural".

  7. DIN 47100 - Wikipedia

    en.wikipedia.org/wiki/DIN_47100

    DIN Standard DIN 47100 regulated the color-coding for the identification of cores in telecommunication cables. The standard was withdrawn without a replacement in November 1998, but remains in widespread use by cable manufacturers. The isolations of the several wires in a cable are either solidly colored in one color, or striped lengthwise in ...

  8. Timeline of computing 1950–1979 - Wikipedia

    en.wikipedia.org/wiki/Timeline_of_computing_1950...

    J. Lyons, a United Kingdom food company, famous for its tea, made history by running the first business application on an electronic computer. A payroll system was run on Lyons Electronic Office (LEO) a computer system designed by Maurice Wilkes who had previously worked on EDSAC. Sep 1951: UK

  9. Electronic navigational chart - Wikipedia

    en.wikipedia.org/wiki/Electronic_navigational_chart

    An Electronic Navigational Chart (ENC) is a digital representation of a real-world geographical area for the purpose of Marine navigation.Real-world objects and areas of navigational significance, or to a lesser degree - informational significance, are portrayed through Raster facsimiles of traditional paper charts; or more commonly through vector images, which are able to scale their relative ...

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