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  2. PDF - Wikipedia

    en.wikipedia.org/wiki/PDF

    HTML Form format HTML 4.01 Specification since PDF 1.5; HTML 2.0 since 1.2 Forms Data Format (FDF) based on PDF, uses the same syntax and has essentially the same file structure, but is much simpler than PDF since the body of an FDF document consists of only one required object. Forms Data Format is defined in the PDF specification (since PDF 1.2).

  3. PDF/A - Wikipedia

    en.wikipedia.org/wiki/PDF/A

    PDF is a standard for encoding documents in an "as printed" form that is portable between systems. However, the suitability of a PDF file for archival preservation depends on options chosen when the PDF is created: most notably, whether to embed the necessary fonts for rendering the document; whether to use encryption; and whether to preserve additional information from the original document ...

  4. Point (typography) - Wikipedia

    en.wikipedia.org/wiki/Point_(typography)

    He did not change the subdivisions (1 inch = 12 subdivisions = 72 points), but defined it strictly in terms of the royal foot, a legal length measure in France: the Didot point is exactly 1 ⁄ 864 of a French foot or 1 ⁄ 72 of a French inch, that is (by 1799) 15 625 ⁄ 41 559 mm or about 0.375 972 mm. Accordingly, one Didot point is exactly ...

  5. File:Graph paper inch Letter.pdf - Wikipedia

    en.wikipedia.org/wiki/File:Graph_paper_inch...

    English: Gray, blue, red, green, black graph papers with 1 inch–0.5 inch1/12 inch grids (page size: US Letter) in printable PDF format. Date 25 July 2013, 18:02:35

  6. Square inch - Wikipedia

    en.wikipedia.org/wiki/Square_inch

    The following symbols are used to denote square inches: square in; sq inches, sq inch, sq in; inches/-2, inch/-2, in/-2; inches^2, inch^2, in^2; inches 2, inch 2, in 2 (also denoted by "2) historic engineering drawings ″ (number with a square & a double apostrophe, both as an exponent) The square inch is a common unit of measurement in the ...

  7. Ratio - Wikipedia

    en.wikipedia.org/wiki/Ratio

    For example, the ratio 4:5 can be written as 1:1.25 (dividing both sides by 4) Alternatively, it can be written as 0.8:1 (dividing both sides by 5). Where the context makes the meaning clear, a ratio in this form is sometimes written without the 1 and the ratio symbol (:), though, mathematically, this makes it a factor or multiplier .

  8. List of disk drive form factors - Wikipedia

    en.wikipedia.org/wiki/List_of_disk_drive_form...

    This smaller form factor is similar to that used in an HDD by Rodime in 1983, which was the same size as the "half height" 3½" FDD, i.e., 1.63 inches high. Today, the 1-inch high ("1/3 height," "slimline," or "low-profile") version of this form factor is the most popular form used in most desktops. The format was standardized in terms of ...

  9. Aspect ratio - Wikipedia

    en.wikipedia.org/wiki/Aspect_ratio

    For example, the aspect ratio of a rectangle is the ratio of its longer side to its shorter side—the ratio of width to height, [1] [2] when the rectangle is oriented as a "landscape". The aspect ratio is most often expressed as two integer numbers separated by a colon (x:y), less commonly as a simple or decimal fraction .