Hi, because HTB3 seems relatively stable I wanted to revide HTB manual. I''m working on "How does it work" section which will be probably of Don Cohen''s interest ;) I spent 10 hrs by writting HTB simulation in Perl - it is able to produre postscript pictures of inner data structure for given class hierarchy. The text is not ready yet but I want to shate the pics with you (to my satisfaction with the work done). Look at http://luxik.cdi.cz/~devik/qos/htb/manual/ ;) devik