Acknowledgments

Parts of Chapter 2 , were adapted from O'Reilly & Associates' X Window System User's Guide, Volume 3, OSF/Motif Edition , by Valerie Quercia and Tim O'Reilly. Valerie Quercia reviewed the revised Chapter 2 .

Gigi Estabrook was the update editor for the fourth edition, and Nancy Wolfe Kotary was the production editor and copyedited the new edition. Madeleine Newell proofread the fourth edition; Seth Maislin wrote the index; Sheryl Avruch, Nicole Gipson Arigo, and Mary Anne Mayo provided quality control checks; and Elissa Haney provided production assistance.