Here you will find various URL's and the like that will send you shooting around the internet to helpful sites not within The Arduino Board's jurisdiction. Sadly there isn't a place to comment here.
Arduino Reference Page
This leads to a compilation of Arduino code functions with descriptions that are just vague enough to not be very helpful. Besides, wouldn't you rather stay here with us?
Circuitry Symbols
Here is where you can find a glossary of symbols used in circuitry diagrams with descriptions of what they mean.
Arduino Boards
Here you can find a list of all Arduino boards.
