This SAE Aerospace Information Report (AIR) describes the Architecture Framework for Unmanned Systems (AFUS). AFUS comprises a Conceptual View, a Capabilities View, and an Interoperability View. The Conceptual View provides definitions and background for key terms and concepts used in the unmanned systems domain. The Capabilities View uses terms and concepts from the Conceptual View to describe capabilities of unmanned systems and of other entities in the unmanned systems domain. The Interoperability View provides guidance on how to put it all together in a way that supports interoperability. The purpose of this Aerospace Information Report is to communicate to the unmanned systems community a common set of principles, terms, concepts, patterns, structures, and guidance for creating system architectures that include or interact with unmanned systems.