The design and use of computer technology pertaining to the interfaces between human users and computers are explored within the domain of human-computer interaction. The designing of technologies which allows humans to interact with computers in new ways is explored in this field. It also observes the ways in which humans interact with computers. Human-computer interaction is an amalgamation of a variety of fields such as behavioral sciences, design, media studies and computer science. Research within this field is further divided into various subfields. Some of these are augmented reality, user customization, social computing, embedded computation and brain-computer interfaces. The various sub-fields of human-computer interaction along with technological progress that have future implications are glanced at in this book. It will also provide interesting topics for research which interested readers can take up. This textbook is appropriate for students seeking detailed information in this area as well as for experts.