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  2. 19-inch rack - Wikipedia

    en.wikipedia.org/wiki/19-inch_rack

    The posts are each 0.625 inches (15.88 mm) wide, and are separated by a gap of 17.75 inches (450.85 mm), giving an overall rack width of 19 inches (482.60 mm). The posts have holes in them at regular intervals, with both posts matching, so that each hole is part of a horizontal pair with a center-to-center distance of 18.312 inches (465.12 mm).

  3. Rack unit - Wikipedia

    en.wikipedia.org/wiki/Rack_unit

    Rack with sample component sizes including an A/V half-rack unit. A rack unit (abbreviated U or RU) is a unit of measure defined as 1 + 3 ⁄ 4 inches (44.45 mm). It is most frequently used as a measurement of the overall height of 19-inch and 23-inch rack frames, as well as the height of equipment that mounts in these frames, whereby the height of the frame or equipment is expressed as ...

  4. Envelope - Wikipedia

    en.wikipedia.org/wiki/Envelope

    At least 3 + 1 ⁄ 2 inches high × 5 inches long × 0.007 inch thick. No more than 6 + 1 ⁄ 8 inches high × 11 + 1 ⁄ 2 inches long × 1 ⁄ 4 inch thick. Letters that have a length-to-height aspect ratio of less than 1.3 or more than 2.5 are classified as "non-machinable" by the USPS and may cost more to mail. Chinese sizes

  5. Broadsheet - Wikipedia

    en.wikipedia.org/wiki/Broadsheet

    Broadsheet. Comparison of some newspaper sizes with metric paper sizes. Approximate nominal dimensions are in millimetres. A soldier reading Pravda, a broadsheet newspaper, in 1941. A broadsheet is the largest newspaper format and is characterized by long vertical pages, typically of 22.5 inches (57 cm).

  6. Paper size - Wikipedia

    en.wikipedia.org/wiki/Paper_size

    A foot-long sheet with the common width of Letter and (Government) Legal, i.e. 81⁄2 in × 12 in (215 mm × 305 mm), would have an aspect ratio very close to the square root of two as used by international paper sizes and would actually almost exactly match ISO RA4 (215 mm × 305 mm).

  7. Display resolution standards - Wikipedia

    en.wikipedia.org/wiki/Display_resolution_standards

    The resolutions are equal, and the size of the 1600 resolution edges (if the manufacturer is honest) is within a tenth of an inch (16-inch vs. 15.89999"), presenting a "picture window view" without the extreme lateral dimensions, small central panel, asymmetry, resolution differences, or dimensional difference of other three-monitor combinations.

  8. List of Facebook features - Wikipedia

    en.wikipedia.org/wiki/List_of_Facebook_features

    A user's wall is visible to anyone with the ability to see their full profile, and friends' wall posts appear in the user's News Feed. In July 2007, Facebook allowed users to post attachments to the wall, whereas previously the wall was limited to text only. In May 2008, the Wall-to-Wall for each profile was limited to only 40 posts.

  9. Photo print sizes - Wikipedia

    en.wikipedia.org/wiki/Photo_print_sizes

    In the normal series, the long edge is the length of the short edge plus 2 inches (10 in or less) or 3 inches (11 in and above). The alternative Super series, denoted SnR, nR Plus or nR+, has an aspect ratio of 3∶2 (or as close as possible) and thus provides a better fit for standard 135 film (35 mm) at sizes of 8 inches or above. 5R is twice ...