For instance, those with master's degrees usually do not list their bachelor's degrees (only the highest earned degree), and a staff nurse would likely not list an MBA, but a nurse manager might choose to do so.
An unmanned aircraft system is an unmanned aircraft and the equipment necessary for the safe and efficient operation of that aircraft. An unmanned aircraft is a component of a UAS. It is defined by statute as an aircraft that is operated without the possibility of direct human intervention from within or on the aircraft (Public Law 112-95, Section 331(8)).
To the military, they are UAVs (Unmanned Aerial Vehicles) or RPAS (Remotely Piloted Aerial Systems). However, they are more commonly known as drones. Drones are used in situations where manned flight is considered too risky or difficult. They provide troops with a 24-hour eye in the sky, seven days a week.