Sincerely,
John
Amazing, Googling for "TSAP lists as first result
http://wombat.doc.ic.ac.uk/foldoc/foldoc.cgi?TSAP which says "Transport
Service Access Point" (There's also NSAP = Network Service Access
Point).
You may want to look up ISO8072 aka ITU-T X.214 for more details (and
more abbreviations :-))
Marc