Wasn't there quite a lengthy discussion of this very issue some time back on the Aud List? I can't recall who initiated it, but there was a lot of back and forthing, with no real conclsuions, but a lot of fun speculation. Let's go to the archives! McGill is running a new version of LISTSERV (1.8c on Windows NT). Information is available on the WEB at http://www.mcgill.ca/cc/listserv