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  2. 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). [1] [2] 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 ...

  3. Keycap - Wikipedia

    en.wikipedia.org/wiki/Keycap

    A keycap is a small cover of plastic, metal, or other material placed over the keyswitch of a computer keyboard.

  4. 19-inch rack - Wikipedia

    en.wikipedia.org/wiki/19-inch_rack

    Thus, a 1U rackmount computer is not 1.750 inches (44.5 mm) tall but is 1.719 inches (43.7 mm) tall. If n is number of rack units, the ideal formula for panel height is h = 1.75n − 0.031 for calculating in inches, and h = 44.45n − 0.794 for calculating in millimeters. This gap allows a bit of room above and below an installed piece of ...

  5. Talk:Rack unit - Wikipedia

    en.wikipedia.org/wiki/Talk:Rack_unit

    The height increment of a front panel is 1U, equal to 44,45 mm. Thus is would seem that the actual value of the U unit is in fact 44.45 mm, NOT 44.50 mm as stated in the article. This makes a lot of sense, since the system is obviously based on Imperial units, and 1.75 inch is in fact 44.45 mm. I would suggest that this be corrected in the article.

  6. Category:Computer keyboards - Wikipedia

    en.wikipedia.org/wiki/Category:Computer_keyboards

    العربية; বাংলা; 閩南語 / Bân-lâm-gú; Català; Dansk; Deutsch; Eesti; Español; Esperanto; Euskara; فارسی; Français; 한국어 ...

  7. Keyboard technology - Wikipedia

    en.wikipedia.org/wiki/Keyboard_technology

    Due to the requirement of many notebooks to be slim, they require the keyboards to be low-profile. Therefore, this technology is most commonly featured on notebooks. The keys are attached to the keyboard via two plastic pieces that interlock in a "scissor"-like fashion and snap to the keyboard and the keycap.

  8. 1U - Wikipedia

    en.wikipedia.org/wiki/1U

    RS-1U, a type of K-5 (missile) J-1U, a model of Auster Workmaster; SSH 1U (WA); see Washington State Route 503; An abbreviation for 1 Utama; An abbreviation for "One Union" or "One Big Union", a concept and slogan used by industrial unionists, including the IWW. #1U is used also as a hashtag on social media by labor activists and organizations.

  9. Model M keyboard - Wikipedia

    en.wikipedia.org/wiki/Model_M_keyboard

    Keycap in a French Model M. The Model M keyboard was designed to be less expensive to produce than the Model F keyboard it replaced. Principal design work was done at IBM in 1983–1984, drawing on a wide range of user feedback, ergonomic studies, and examination of competing products.

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