Appendix

Three reference pages, meant for looking things up rather than reading straight through:

• A - The Stack Cheat Sheet: a one-page summary of every “which one should I pick” decision in this book.
• B - Glossary of Ecosystem Terms: the recurring vocabulary, defined by what it does for you.
• C - Index of “Under the Hood” Boxes: every optional aside in this book, indexed by chapter, for whenever curiosity strikes.