'''BSD''' refers to all sorts of things, but notably the version of [UNIX] from the University of California at Berkeley (the '''B'''erkeley '''S'''tandard '''D'''istribution--or, according to Wikipedia [http://en.wikipedia.org/wiki/BSD] and [rdt]'s memory, "... '''S'''oftware ...") and the [license] thereof. [Tcl] (which also started out at the University of California) uses a very similar license, though without the advertising clause (''i.e.'', you are not required to put a big message in saying that you are using Tcl and acknowledging the original authors). "The State of the Demon Address" [http://osviews.com/modules.php?op=modload&name=News&file=article&sid=2557] aims to describe the different flavors of BSD Unix as of fall 2004. ---- [rdt] Hmmm, my recollection of BSD from the mid 1980's is that it was the '''B'''erkeley '''S'''oftware '''D'''istribution. ---- [Kevin Kenny] noted in the [Tcl chatroom] on 2003-06-12: "UCB removed the advertising clause in 1999." ---- [LES] I'd risk saying that, in the 21st century, whenever someone talks about BSD, they most probably mean either the BSD license or one of the three most popular "BSD [UNIX]" distributions: [FreeBSD], [NetBSD] and/or [OpenBSD]. <> Glossary | Licence | Operating System | Unix | BSD