The U.S. Federal Aviation Administration (FAA) and other regulators are working together on certification of advanced air mobility (AAM) aircraft. The FAA describes AAM as "a rapidly emerging new sector of the aerospace industry which aims to safely and efficiently integrate highly automated aircraft into the National Aerospace System (NAS). AAM is not a single technology, but rather a collection of new and emerging technologies being applied to the aviation transportation system, particularly in new aircraft types."