William Newman addresses human-computer interaction from a computer-science viewpoint, focusing on design and development rather than cognitive ergonomics. This work includes practical focus on modern environments (such as X or Windows), tools and implementation issues. It explains how to work in a variety of user-interface notations and be more confident in dealing with conceptual models, interface styles and details of design. Case studies are used to illustrate the challenges and pitfalls of user-centred design.