Is there a idiots guide to rc?

[wurzelyzf]

Things have changed so much since I was last into rc,brushed / brushless, ni-mh/lipo transponders, frequency's etc etc etc. I don't want to constantly bend someones ear about the real basic stuff so I was wondering if there was an idiots guide anywhere I could look at. For eg,there were only 6 crystals when I was into it,one went in the controller and the other in the reciever. Is this still the smae or has that all changed too? What frequencies are used etc etc.
Thanks in advance from mr Noob the thicky lol.