Ref: module identification, if any (usually an internal keyword)
Year: some courses are organized in terms, other in semesters,
etc. So only the academic year of each module is recorded.
Remaining data fields: keywords referring to topics, tools, methods
taught in module.
By moving the cursor to an orange ball you get a description
of the topic (eg B = B-method);
by clicking an orange ball you (should!)
reach an URL providing information about the topic or tool
(e.g. in the FM World Wide Web Virtual Library).
