b. Brevity Code. A brevity code is the shortened form of a frequently used unclassified phrase, sentence, or group of sentences. For example, COMSEC means communications security, SQT means skill qualification test, and MOS means military occupational specialty. When originating brevity codes--
(1) Use letters that convey the meaning of the language they represent.
(2) Do not represent the same word with more than one brevity code.
(3) The first letter of the brevity code and the first letter of the
phrase should be the same.