Like the other books in Wiley's Bible series, we have used icons to identify helpful comments, pointers, and suggestions:
The Caution icon identifies possible problems or errors that may occur as a result of performing a step incorrectly.
The Cross-Reference icon refers the reader to other chapters or sections within the book that are relevant to the topic being discussed.
The Note icon identifies important information that is tangential to the discussion.
The Tip icon identifies special information or an insight.