Complex sentence: An unmanned aircraft system (UAS) includes ground stations and other elements besides the actual aircraft, the term was first officially used by the FAA in early 2005 and subsequently adopted by DoD that same year in their Unmanned Aircraft System Roadmap 2005--2030.
Split into simpler sentences: An unmanned aircraft system (UAS) includes ground stations and other elements besides the actual aircraft. The term was first officially used by the FAA in early 2005 and subsequently adopted by DoD that same year in their Unmanned Aircraft System Roadmap 2005--2030.