RED

RED might refer to:

• RED , the U.S. codename for a Japanese cipher machine used for diplomatic traffic, in service just prior to World War II. Not to be confused with:
  • The Red code, the U.S. codename for a Japanese code used by the Imperial Japanese Navy prior to World War II.
• An acronym for Redfern-Eveleigh-Darlington, a redevelopment scheme in Sydney, Australia.
• An acronym for Random early detection, a queue management algorithm.
• The name of the colour red, capitalised.