Kit, ARF, RR, PNP, what is the difference between these?

When looking at planes, you come across various abbreviations.

Different manufacturers have different markings that may confuse even the more experienced enthusiast.

Short kit= construction set with wing and frame ribs included. In addition, you will need additional wood pack and small parts.

Kit= construction kit, no servos, engine included.

Kit += Construction kit with Power set, servos and extension cables.

RR= Assembled kit including Power set, servos, extension cables and typical decals applied

RR+= Assembled kit including Power set, servos, extension cables and receiver. You will need a compatible transmitter, battery and charger.

BNF= Bind and Fly, Assembled kit including Power set, servos, extension cables and receiver. You will need a compatible transmitter, battery and charger.

RTF= Ready to Fly, includes everything needed.

ARF= Almost Ready to Fly, this is a very relative concept. Usually the airplane itself is pretty ready, usually does not include servos, power set...

PNP= Plug and Play, just add your own receiver and a suitable battery to your plane. Usually everything else necessary pre-installed. Here, too, there are exceptions, for example, Robbe PNP electric motor gliders do not include a speed controller.