A rule-based system that suggests computer adaptations for users with special needs

A�rule-based program was written in Prolog to give advice about how to configure a computing system for users who have special needs. It employs a simple user model describing visual, cognitive, motor, and other abilities. Recommendations are made about appropriate input and output devices, including screens, keyboards, speech devices, and many others. The program was tested against professionals in this field and was shown to agree with them about as well as they agree with one another. Potential uses include advising those who configure computer systems, serving as a teaching tool, and driving intelligent human-computer interaction.