I just thought I'd summarize since this generated so much response. It's apparently just not possible to really tell for sure without looking at the source code, and it was not possible to get ahold of any of the University licensee's or Microsoft developers in time to go into that level of detail. There were a few "telltales", however, such as the TCP initial window in Windows 2000 being exactly the same as FreeBSD and OpenBSD and a few headers in Microsoft Visual studio, as well as various userland utilities, bearing the BSD trademark. In any case, I'd like to thank everyone for their help and suggest that those interested read Monday's (June 18th) Wall Street Journal for some of the results of their research. - Jordan To Unsubscribe: send mail to [EMAIL PROTECTED] with "unsubscribe freebsd-hackers" in the body of the message