d communications at The Institute of Museum and Library Services. Thanks also to my daughter, Nancy Dodd, principal at Nancy Dodd Research; Joe McGrath, Senior Vice President, information technologies; and Susan Truesdale, Senior Director, Networking and Telecommunications at Sunovion Pharmaceuticals, My graduate students at Northeastern University contributed an enormous amount of firsthand knowledge. International students from countries as diverse as China, India, Senegal, and Peru shared information about the state of networks and technol- ogy in their countries. Students from the United States in turn offered examples of how their organizations use technology. All of my students made valuable comments about how the Internet and mobile networks impact their everyday lives. I couldn't have written this book without the support and help of all of these people. Special thanks to my husband, Bob, for his perceptive comments. He read every chapter multiple times. He provided the keen insights and asked the tough questions I've come to expect, based on his observations about my first four editions. About the Author Annabel Z. Dodd is an adjunct faculty member at Northeastern Uni- versity's School of Professional Studies, where she teaches courses on wireless mobile services and data communications in the Master's Degree Program in Informatics. She has been an adjunct professor in the Master of Science in Technology Management program at the State University of New York at Stony Brook, where she taught in a joint program with The Institute of Industrial Policy Studies, Seoul, South Korea. In addition, the Fundación de la Innovación Bankinter, selected her to participate in their Future Trends Forum in Madrid in 2004, 2005, and 2007. Formerly in marketing at New England Telephone (now Verizon Communications) and Telecommunications Manager at Dennison Manufacturing Company (now Avery Denni- son), Annabel consults with major corporations and institutions and gives seminars to organi- zations worldwide. The Massachusett