This standard is part of a set of standards and recommended practices for DIS applications. Each standard and recommended practice in the set describes one or more of the elements that constitute the DIS environment. As a whole, the set of standards and recommended practices will define an interoperable simulated engagement environment. This particular standard addresses the application protocols. This standard defines the data messages, known as PDUs, that are exchanged on a network between simulation applications. The messages are organized within specified domains called protocol families. The protocol families included in this standard include Entity Information/Interaction, Warfare, Logistics, Simulation Management, Distributed Emission Regeneration, Radio Communications, Entity Management, Minefield, Synthetic Environment, Simulation Management with Reliability, Live Entity Information/Interaction, and Non-Real Time.