The following URL references a page which defines a number of classification groups for the modules which are currently on the AVS module repository:
http://info.mcc.ac.uk/CGU/AVS/summary/avs-group. html
The repository is maintained by the International AVS Center, North Carolina Supercomputing Center, US and is available via anonymous FTP (avs.ncsc.org:/pub/cgu/avs-modules).This repository is shadowed in the UK by Manchester Computing Centre, University of Manchester.
ftp.mcc.ac.uk:/pub/cgu/ avs-modules
Steve Larkin
s.larkin@mcc.ac.uk