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  2. Engineering drawing - Wikipedia

    en.wikipedia.org/wiki/Engineering_drawing

    ISO Lettering templates, designed for use with technical pens and pencils, and to suit ISO paper sizes, produce lettering characters to an international standard. The stroke thickness is related to the character height (for example, 2.5mm high characters would have a stroke thickness - pen nib size - of 0.25mm, 3.5 would use a 0.35mm pen and so ...

  3. Division sign - Wikipedia

    en.wikipedia.org/wiki/Division_sign

    The division sign (÷) is a mathematical symbol consisting of a short horizontal line with a dot above and another dot below, used in Anglophone countries to indicate the operation of division. This usage, though widespread in some countries, is not universal and the symbol has a different meaning in other countries.

  4. DOT pictograms - Wikipedia

    en.wikipedia.org/wiki/DOT_pictograms

    The results of this research, as well as guidelines on how to best implement the symbols was presented in a report titled Symbol Signs – The development of Passenger/Pedestrian Oriented Symbols for Use in Transportation-Related Facilities in November 1974. [2] In 1979, 16 symbols were added, bringing the total count to 50. [3]

  5. Integral symbol - Wikipedia

    en.wikipedia.org/wiki/Integral_symbol

    In other languages, the shape of the integral symbol differs slightly from the shape commonly seen in English-language textbooks. While the English integral symbol leans to the right, the German symbol (used throughout Central Europe) is upright, and the Russian variant leans slightly to the left to occupy less horizontal space. [7]

  6. Hazard symbol - Wikipedia

    en.wikipedia.org/wiki/Hazard_symbol

    Skull and crossbones, a common symbol for poison and other sources of lethal danger (GHS hazard pictograms). Hazard symbols are recognizable symbols designed to warn about hazardous or dangerous materials, locations, or objects, including electromagnetic fields, electric currents; harsh, toxic or unstable chemicals (acids, poisons, explosives); and radioactivity.

  7. Base64 - Wikipedia

    en.wikipedia.org/wiki/Base64

    The original specification, RFC 989, additionally used the * symbol to delimit encoded but unencrypted data within the output stream. To convert data to PEM printable encoding, the first byte is placed in the most significant eight bits of a 24-bit buffer, the next in the middle eight, and the third in the least significant eight bits. If there ...

  8. Greek letters used in mathematics, science, and engineering

    en.wikipedia.org/wiki/Greek_letters_used_in...

    The OpenType font format has the feature tag "mgrk" ("Mathematical Greek") to identify a glyph as representing a Greek letter to be used in mathematical (as opposed to Greek language) contexts. The table below shows a comparison of Greek letters rendered in TeX and HTML.

  9. Freemasonry - Wikipedia

    en.wikipedia.org/wiki/Freemasonry

    The candidate of these three degrees is progressively taught the meanings of the symbols of Freemasonry and entrusted with grips, signs, and words to signify to other members that he has been so initiated. The degrees are part allegorical morality play and part lecture.