Hand (unit) Biblical exegesis the hand measurement, as for example in the Vision of the Temple, Authorized Version , is usually taken to be palm or handbreadth, and in modern translations may be rendered as "handbreadth" or "three inches". The hand is a traditional unit in the UK. It was standardised at four inches by a statute of King Henry VIII in 1540, but some confusion between the various types of hand measurement, and particularly between the hand and the handsbreadth, appears to have persisted. Phillips's dictionary of 1706 gives four inches for the length of the handful or hand, and three
Rack unit Rack unit A rack unit (abbreviated U or RU) is a unit of measure defined as . 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 multiples of rack units. For example, a typical full-size rack cage is 42U high, while equipment is typically 1U, 2U, 3U, or 4U high. The rack unit size is based on a standard rack specification as defined in EIA-310. The Eurocard specifies