Editing U (section)

==Other uses==
{{main|U (disambiguation)}}
* The symbol 'U' is the chemical symbol for [[uranium]].
* In the context of [[Newton's laws of motion|Newtonian mechanics]], 'U' is the symbol for the [[potential energy]] of a system.
* 'u' is the symbol for the [[atomic mass unit]], and 'U' is the symbol for one [[enzyme unit]].
* In the [[International Phonetic Alphabet]], the [[close back rounded vowel]] is represented by the lowercase {{angbr|u}}.
* 'U' is also the source of the mathematical symbol ∪, representing a [[union (set theory)|union]]. It is used mainly for [[Venn diagram]]s and [[geometry]].
* It is used for ''micro-'' in metric measurements as a replacement for the Greek letter [[μ]] (mu), of which it is a graphic approximation when that Greek letter is not available, as in "<code>um</code>" for [[μm]] (micrometer).
* Some universities, such as the [[University of Miami]] and the [[University of Utah]], are locally known as "The U".
* 'U' (or sometimes RU) is a standard height unit of measure in [[rack unit]]s, with each U equal to {{convert|44.50|mm|in|2}}.
* 'U' is used as the symbol of the World War II organization [[Ustaše]].
* '''U''' is an honorific in Burmese.<ref>{{cite news |url=https://www.frontiermyanmar.net/en/the-meaning-behind-myanmar-names/ |title=The meaning behind Myanmar names |work=Frontier Myanmar |first=Sharon |last=Pun |date=2018-08-04 |access-date=2021-02-09 |archive-date=2021-02-14 |archive-url=https://web.archive.org/web/20210214114737/https://www.frontiermyanmar.net/en/the-meaning-behind-myanmar-names/ |url-status=live}}</ref>