Due to the ever-changing technological landscape and the global integration of the Internet in schools, libraries, homes, and businesses, the content of this second edition changed significantly. Since many computer users are connected at both home and work, the Web has transformed communication; consumption patterns; and access to business, politicians, and neighbors halfway around the world. With numerous books on user-friendly Web sites, the editor's challenge was to deliver a volume with a radically different snapshot of the research being conducted at the beginning of the 21st century. The chapters in this book provide many answers to critical questions and propose thought-provoking research ideas for the future. Corporate and academic practitioners, as well as their doctoral fellows and graduate students from around the globe contributed their time, expertise, and unique research practices. Together, they collectively provide another comprehensive resource that the growing community of human factors and Web development experts can share. The editor's hope is that this book will inspire leading-edge research on accessible Web applications or other topics in the coming years.