A "user interface" is the part of an interactive system that bridges the user and the underlying functionality of the system. But people sometimes forget that the best interfaces will provide a platform to optimize the users' interactions so that they support and extend the users' activities in effective, useful, and usable ways. To look at it…

Discusses the need for usability testing for information systems and for librarians to recognize what makes computer interfaces either easy or difficult to use. Highlights include user friendliness; navigation; standards; visual appeal; layout and design; feedback; help screens; and the usability-testing process. (LRW)