Figure 1. The WIMOVAC context sensitive on-line hyper-help system. i). The search button provides search abilities for keywords and topics from within the help system. ii). The back and History buttons allow the user to step backwards through previously read material and allow the help system to be used like an on line book. iii). Coloured underlined text indicates a hyper help topic on which further information is available. Double clicking on this jumps the user to further information. iv). Equations, segmented hyper-graphics, bitmaps and metafiles have been introduced into the help system to clarify textual information. v). The contents button gives access to an alphabetical list of all keywords and topics contained in the help system. This list is automatically produced by the help compiler.