Radio code

Radio code is a colloquial term that refers to any code that is commonly used over a telecommunication system.

Brevity code

Main article: Brevity code

Brevity codes are designed to convey complex information with a few words or codes. Specific brevity codes include:

• ACP-131
• Aeronautical Code signals
• ARRL Numbered Radiogram
• Multiservice tactical brevity code
• Ten-code
• Phillips Code
• NOTAM Code

Operating signals

Brevity codes that are specifically designed to be used between communications operators and to support communication operations are refered to as "operating signals". These include:

• 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.

Other

Morse code, is commonly used in Amateur radio. Morse code abbreviations are a type of brevity code. Procedure words used in radiotelephony procedure, are a type of radio code. Spelling alphabets, including the ICAO spelling alphabet, are commonly used in communication over radios and telephones.

See also

• Encoding