ACKNOWLEDGEMENTS

An outstanding team of dedicated professionals at IT Governance Publishing has made the creation of this book a pleasure and not a task.

We appreciate the contributions of all who supported us and participated in the content of the book or provided useful suggestions:

To Jack:

I, Julie, am forever indebted to my partner and best friend, Jack, for believing in me and never allowing me to falter in my belief in myself. A simple thank you will never be enough.

To Angela:

For your unfailing professionalism and responsiveness – this constant connection gave us encouragement and support.

The smaller cover images are made available under the Creative Commons Attribution/Share-Alike License. We acknowledge NASA and the US federal government as the sources of these images.