I have made a haskell module for HMM (hidden markov models) demonstration. If somebody is interested, you can find it at http://www.markusschnell.com/haskell.html Not meant for production code, there are better implementations. (Hal?) There's also a module for maintaining demo and development versions for your programs. Have a look at it, comments (or better versions) are welcome. Markus -- Markus Schnell