Actually John, Paul Rutherford, and Trevor Watts, and several other rather well known English jazz musicians had got their training by joining the Air Force, which was a pretty standard way for people to get some kind of musical education in those days. Evan Parker
The standard way to record a meeting is to list people's names, the topics, and action items. The visual way is to doodle a rectangle (the table) populated by figures (the participants) sitting around the table with their comments as cartoon word balloons. Tom Wujec