The Reactive Keyboard : Cambridge University Press : 9780521403757 : 0521403758 : 17 Sep 1992 : Extremely slow communication is a daily reality for many people with different forms of physical disability. Modern computer interfaces can be designed to enhance expressive communication. This is accomplished first by supplying facilities to tailor them to each particular user's residual physical disabilities, and second by automatically supplying much of the redundancy inherent in natural communication. In the first part of this book a functional architecture for communication aids is discussed and the idea of automatically supplying the intrinsic redundancy contained in natural communication is explained. The distinctions between adaptive and non-adaptive models of communication are shown and details are given of working predictive text generation systems. One such system is the Reactive Keyboard, and in the second part of the book this is described. It greatly speeds communicatio