Introduction: What Arduino is and why you'd want to use it.
Installation: Step-by-step instructions for setting up the Arduino software and connecting it to an Arduino Uno, Mega2560, Duemilanove, Mega, or Diecimila.
Environment: Description of the Arduino development environment.
Troubleshooting: Advice on what to do if things don't work.
Instructions for other boards:
The text of the Arduino getting started guide is licensed under a Creative Commons Attribution-ShareAlike 3.0 License and is based on the Arduino reference. Code samples in the guide are released into the public domain.