Radio code

Radio codes include:

• ICAO spelling alphabet
• Procedure words
• Brevity code
  • ACP-131
  • Aeronautical Code signals
  • ARRL Numbered Radiogram
  • Multiservice tactical brevity code
  • Ten-code
  • Phillips Code
  • NOTAM Code
• Operating signals
  • Prosigns for Morse code
  • 92 Code Western Union telegraph brevity codes
  • Q code - initially developed for commercial radiotelegraph communication, and later adopted by other radio services, especially amateur radio. Used since circa 1909.
  • QN Signals - published by the ARRL and used by Amateur radio operators to assist in the transmission of ARRL Radiograms in the National Traffic System.
  • R code - published by the British Post Office in 1908 for use only by British coastal wireless stations and ships licensed by the Postmaster General.
  • S code - published by the British Post Office in 1908 for use only by British coastal wireless stations and ships licensed by the Postmaster General.
  • X code - used by European military services as a wireless telegraphy code in the 1930s and 1940s
  • Z code - also used in the early days of radiotelegraph communication.
• Morse code
• Radiotelephony procedure
• Car Radio Code Unlock

Also see encoding generally.