Many people have contributed directly and indirectly to this book, with snippets from email messages and discussion group postings and directly to me. I list here some of the people who have contributed, knowingly and unknowingly.
Rohinton Kazak fixed many typos. Vincent McIntyre provided information on the installation of the machine I've called Vince (4.10.10). Damien McAullay, Christian Kaske, Yoshiro Mihira, Jason Burrell, Bob Bownes, Peter Lamb, Dirk Eddelbuettel, Dean Jackson, Karsten Self, Shaul Karl, Ethan Benson, John Flinchbaugh, Nathan Norman, Noah L. Meyerhans, Manoj Srivastava, and many others.