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Much has changed since the first edition of human-computer interaction was published. Ubiquitous computing and rich sensor-filled environments are finding their way out of the laboratory, not just into movies but also into our workplaces and homes. The computer has broken out of its plastic and glass bounds providing us with networked societies where personal computing devices from mobile phones to smart cards fill our pockets and electronic devices surround us at home and work. The web too has grown from a largely academic network into the hub of business and everyday lives. As the distinctions between the physical and the digital, and between work and leisure start to break down, human-computer interaction is also changing radically. The excitement of these changes is captured in this new edition, which also looks forward to other emerging technologies. However, the book is firmly rooted in strong principles and models independent of the passing technologies of the day: these foundations will be the means by which today's students will understand tomorrow's technology. The third edition of human-computer interaction can be used for introductory and advanced courses on HCI, Interaction Design, Usability or Interactive Systems Design. It will also prove an invaluable reference for professionals wishing to design usable computing devices. Accompanying the text is a comprehensive website containing a broad range of material for instructors, students and practitioners, a full text search facility for the book, links to many sites of additional interest and much more: go to www. hcibook. com New to this edition: A revised structure …