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Unmanned aerial vehicle - Wikipedia
Unmanned Aircraft Systems (UAS) - Federal Aviation Administration
Unmanned Aerial Systems - Airbus
Unmanned aerial vehicle (UAV) | Definition, History, Types, & Facts
What are Unmanned Aerial Systems?
Unmanned Aerial Systems (UAS) - SKYbrary Aviation Safety
Brief Introduction to Unmanned Aerial Systems | SpringerLink
Commercial drones are here: The future of unmanned aerial systems
Unmanned aerial vehicles (UAVs): practical aspects, applications, …