Brevity codes are used in amateur radio, maritime, aviation and military communications. The codes are designed to convey complex information with a few words or codes. Some terms are classified to the public.

List of brevity codes

• ACP-131 Allied military brevity codes
• ARRL Numbered Radiogram
• Commercial codes such as the Acme Commodity and Phrase Code, the ABC Telegraphic Code, Bentley's Complete Phrase Code, and Unicode
• Fox
• Multiservice tactical brevity code used by various military forces. The codes' procedure words, a type of voice procedure, are designed to convey complex information with a few words, when brevity is required but security is not
• Ten-code, North American police brevity codes, including such notable ones as 10-4
• Phillips Code
• NOTAM Code
• Wire signal, Morse Code abbreviation, also known as 92 Code. Appears in informal language-independent ham conversations
• World War II Allied names for Japanese aircraft