HCI (Human-Computer Interation) is everywhere. With a team of 200 experts, the "Berkshire Encyclopedia of Human-Computer Interation" is a comprehensive guide to every aspect of HCI. The work covers the field's history, breakthroughs, current research, and future direction. An ideal reference for students, educators, professionals, and business leaders, the encyclopedia is full of lively sidebars, more than 75 photos, charts, tables and figures, glossaries, and a rich and comprehesive Master Bibliography of HCI.