RTF (Ready to Fly) airplanes come with everything necessary for flight in the box. A transmitter, receiver, battery, charger, and all other required electronics are included and pre-installed from the factory.
PNP (Plug and Play) airplanes come pre-installed with ESC, motor, and servos. The transmitter, receiver, battery and charger are NOT included.
RTR (Ready to Run) is used to describe vehicles that are basically ready to run/use out of the box. Transmitter, receiver, battery, charger and all accessories are included in the box.
RS (Ready Set) vehicles include the transmitter, receiver and all accessories. Battery and charger are NOT included.