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  2. Letter frequency - Wikipedia

    en.wikipedia.org/wiki/Letter_frequency

    The California Job Case was a compartmentalized box for printing in the 19th century, sizes corresponding to the commonality of letters. The frequency of letters in text has been studied for use in cryptanalysis, and frequency analysis in particular, dating back to the Arab mathematician al-Kindi (c. AD 801–873 ), who formally developed the method (the ciphers breakable by this technique go ...

  3. Typewriter - Wikipedia

    en.wikipedia.org/wiki/Typewriter

    These machines also introduced selectable "pitch" so that the typewriter could be switched between pica type (10 characters per inch) and elite type (12 per inch), even within one document. Even so, all Selectrics were monospaced – each character and letterspace was allotted the same width on the page, from a capital "W" to a period.

  4. Stencil printing - Wikipedia

    en.wikipedia.org/wiki/Stencil_Printing

    The stencil life is defined as a time period in which there will be no significant change in the solder paste material characteristics. A solder paste with a longer stencil life will be more robust in the printing process. Actual stencil life for a paste should be determined from the manufacturers' specifications and on-site verification.

  5. Paper size - Wikipedia

    en.wikipedia.org/wiki/Paper_size

    The latter use US Letter, but their Legal size is 13 inches tall (recognized as Foolscap by printer manufacturers, [24] i.e. one inch shorter than its US equivalent. [ 31 ] Mexico and Colombia, for instance, have adopted the ISO standard, but the US Letter format is still the system in use throughout the country.

  6. DIN 1451 - Wikipedia

    en.wikipedia.org/wiki/DIN_1451

    DIN 1451 is a sans-serif typeface that is widely used for traffic, administrative and technical applications. [1]It was defined by the German standards body DIN (Deutsches Institut für Normung, 'German Institute for Standardisation', pronounced like the English word din) in the standard sheet DIN 1451-Schriften ('typefaces') in 1931. [2]

  7. Engineering drawing - Wikipedia

    en.wikipedia.org/wiki/Engineering_drawing

    The US customary "A-size" corresponds to "letter" size, and "B-size" corresponds to "ledger" or "tabloid" size. There were also once British paper sizes, which went by names rather than alphanumeric designations. American Society of Mechanical Engineers (ASME) ANSI/ASME Y14.1, Y14.2, Y14.3, and Y14.5 are commonly referenced standards in the US.