Some are saying happy birthday to Slackware.
http://www.slackware.com/info/ under "The Slackware Philosophy", it states:
"Since its first beta release in April of 1993, the Slackware Linux Project has aimed at producing the most "UNIX-like" Linux distribution out there."
Linux.com: "Slackware Linux is still going strong. The Slackware Linux Project released Slackware 13.1 on May 24th.This is just a little by shy of the 17th anniversary of Slackware 1.0 and not quite a year after Slackware 13.0. Delve back into yesteryear with me; you're in for a treat."