related(more|less) ) Graph Drawing , InfoViz, GroupWare (particularly knowledge mgmt and IBIS), Writing Systems, mind mapping™.. .

spatial reasoning and ZigZag or other Xanalogical Media systems…

from yon's notes…

http://tockit.sourceforge.net/

Will take me some time to learn, but some key phrases that may be useful..

brief comparison of bayesian networks and principal components analysis http://www.pacificavc.com/blog/2003/02/10.html#a78