Recognised Assessment Entity. This is the replacement term for NQE under the new EASA legislation given to organisations who train and issue CAA-recognised certificates to drone operators 

Vertical Take Off and Landing. Multi rotor craft, as opposed to fixed wing, offer the advantage of being able to take off and land on the spot rather than requiring the space of a runway.

Unmanned Aerial System / Vehicle. Another term for a drone.

Small Unmanned Aerial System. One of the very many alternative terms for a drone.

Speed Over Ground. This can be different to air speed.

Return to Launch / Return to Home. A command that can be given to the drone to recall it to its starting position.

Ready to Fly. A drone that is already assembled and ready to fly out of the box.

Remote Piloted Aerial System. The official term for drone used by the CAA