Surprisingly, these strategies have not been transferred effectively to interactive computer interfaces. Consequently, existing user support facilities are ad hoc designs that do not really support natural work habits. Recent studies which examined people's behaviour in interactive interfaces paid undue attention to command choice and not enough to complete command lines. The problem is to identify likely candidates, and several ways of conditioning the distribution to enhance predictive poser are evaluated. A case study of actual usage of a widely-available history system is included.
Users also organize their activities by task and by function.
A system loosely based on the metaphor of a handyman's workbench is described and used to illustrate the problems that are encountered when facilities to expedite interaction are bolted on to existing computer systems.