This paper begins with a description of the context and background of cognitive research into knowledge acquisition and representation for computer based training. The nature of concept maps is alluded to and examples are given of the ways that maps can facilitate knowledge elicitation. It is noted that: (1) the concept knowledge in this research is acquired and reported by a hypertext system called NoteCards; (2) NoteCards is used as a pre-processor to computer based training applications, and the metaphorical structure created by NoteCards and displayed to browsers is used in hypertext navigation; and (3) visual examples of concepts are held on a videodisc attached to the workstation that runs NoteCards. It is concluded that NoteCards provides a useful environment for experimenting with knowledge elicitation and providing a trainee/learner-based interrupt interface to computer based training. The six figures provided include concept maps, an equipment layout diagram, and a hypertext explanation and video picture. (19 references) (Author/EW)