REF
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- For usage of the ref tag (<ref>…</ref>) on Wikipedia, see Wikipedia:Footnotes.
REF or Ref is a three-letter abbreviation that may refer to:
- Reference, something that refers to something else
- Referee, in sports
- Reform Party, in politics
- The Ref, a film
- Row echelon form, a mathematical matrix construct
- Rapid Equipping Force, a United States Army unit
- Relative effectiveness factor, a measure of the power of an explosive
- Ref, a pseudonym of Belgian comics artist René Follet
- REF, a symbol that means bio-degradeable
- Ref, slang for Refugee, a new immigrant