5.1. Ready to Run - RTR

There is a new trend increasing in popularity: "Ready to Run" or RTR, and "Almost 
Ready to Run" or ARR. These are essentially car kits that are completely or mostly 
pre-built right out of the box. These are especially popular with nitro cars, but 
electric RTR kits are also available. The price is often not that much higher 
compared to the non-RTR equivalent (sometime even lower), and spare parts usually 
have the same availability as the non-RTR counterpart. Again, check into everything 
before you commit to a purchase.
5.2. The controlling bodies of R/C racing

There are several bodies that control 'professional R/C racing'. You only have to 
really worry about their rules if you are going to enter into a race that is 
sanctioned by one of these authorities. You will need to contact the organizer of 
the said race to find out if it is.

IFMAR <http://www.ozemail.com.au/~ifmar/> - International Federation of Model Auto 
Racing. This is taken directly from their web site: "IFMAR's sole responsibility is 
to organize rules for World Championship events."

EFRA <http://www.efra.se/> - European Federation of Radio operated model 
Automobiles. "...the European Federation of Radio Operated Model Automobiles (EFRA) 
exist to promote International links within the sport of Radio Control Model Car 
Racing."

ROAR <http://www.roarracing.com/> - Remotely Operated Auto Racers. "ROAR is the 
official U.S./Canadian sanctioning body for racing R/C cars."

NORRCA <http://www.norrca.com/> - National Organization for Racing Radio Control 
Autos. "The main purpose in forming NORRCA was to give tracks/clubs and racers much 
more than they were receiving from their existing sanctioning organization. NORRCA 
is here to help the tracks/clubs promote their existing facilities, develop their 
existing operations, give them direction on future endeavors and give the racer an 
organization that is truly built around the racers needs."

BRCA <http://www.brca.org/> - British Radio Car Association. "It oversees all 
aspects of the sport, from setting construction rules to organising British 
championship events, to selecting the British team for International competitions."