This United States Air Land Sea Space Application Center (ALSSA) Multi-Service Tactics, Techniques, and Procedures (MTTP) manual, Army Techniques Publication ATP 1-02.1 Brevity March 2023, standardizes air-to-air, air-to-surface, surface-to-air, surface-to-surface, maritime air, and maritime-to-maritime brevity codes regardless of communication medium (voice/chat), and brevity codes (abbreviations) specific for use in tactical chat. The scope is limited to brevity codes used in multi-Service operations. All Services agree to these brevity code meanings. These brevity codes have been forwarded to the North Atlantic Treaty Organization (NATO) for inclusion or modification of the NATO Allied Procedural Publication (APP)-7, Joint Brevity Words and other allied communications publications. This publication will improve coordination and understanding during multi-Service operations. A brevity code is a code that provides no security but which has as its sole purpose the shortening of messages rather than the concealment of content.