A user interface includes a process model unit (34) for predicting one or more allowable next states, from a current state of a process, and a display processing unit (26) for deriving, for each of the allowable next states, a representation of the allowable next state. The display processing unit has...http://www.google.com/patents/US5426732?utm_source=gb-gplus-sharePatent US5426732 - Method and apparatus for user control by deriving next states of a process from a current state and by providing a visual presentation of the derived next states
