A unit of measurement of the height of a rack-mounted device. One rack unit, or RU, is 1.75". See rack mounted.
"rack unit." YourDictionary, n.d. Web. 20 November 2018. <https://www.yourdictionary.com/rack-unit>.
rack unit. (n.d.). Retrieved November 20th, 2018, from https://www.yourdictionary.com/rack-unit
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