The title of a classic reference book in the field of Human-Computer Interface, written by Alan Cooper (full title: About Face: The Essentials of User Interface Design). It's a big, thick book in the manner of computer how-tos, which exhaustively documents Cooper's goal-centered approach to UI design for everything from individual widgets to whole applications. Its sister book, The Inmates Are Running The Asylum, deals more with the advocacy side of being an interface designer.