Radio controlled aircraft

Explanation:
ARF: Almost-Ready-to-Fly is usually completed with transmitter, receiver, motor, propeller, servos, speed control and batteries.
BNF: Bind-n-Fly is usually completed with transmitters, batteries and chargers.
Kit: Kit without electronics.
Kit+: Kit with some electronics included.
PNP: Plug-n-Play Plug-n-Play is usually completed with transmitter, receiver, batteries and charger.
RTF: Ready-to-Fly is ready to fly out of the box, some models are supplemented with 4 AA batteries for the transmitter.