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XXX

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XXX may refer to:

Science and technology

A mark indicating "extra strong"

Various contexts, but especially:

Communications

A warning or danger signal, or symbol for doubtful/unknown

  • XXX, an indication of urgency in radio communication, less urgent than SOS
  • XXX, a comment to warn other programmers of problematic or misleading code
  • XXX, the code for "no currency" in ISO 4217
  • XXX, the code for "unspecified nationality" on a machine-readable passport

Film and television

Music

Songs

Products

Other uses

  • XXX, an indication of urgency in radio communication, less urgent than SOS
  • XXX, three kisses at the end of a letter, text, e-mail, or another form of textual communication
  • XXX, a symbol of the straight edge lifestyle
  • XXX, a reference to Amsterdam, after the three crosses on the Coat of arms of Amsterdam
  • Triplex (espionage), a code name of a British World War II espionage operation

See also