Here are a few good highlight documents:
THE ANATOMY OF A TRANSACTION by MasterCard http://www.mastercard.com/us/company/en/docs/TheAnatomyOfATransaction.2007.pdf
There is no silly question when it comes to card processing. Just lots of confusion and frustration. My goal is to offer a reference place where good people can find answers or directions for common questions and issues. I sincerely hope it will help you. Everything is based on what I keep being asked about so all questions and comments are welcome. I am here to help! Don't hesitate to call.