Slackware is an operating system. It is one of the earliest Linux distributions, and is the oldest currently being maintained.It aims for design stability and simplicity, and to be the most “Unix-like” Linux distribution. It was created by Patrick Volkerding of Slackware Linux, Inc.
Slackware’s latest stable x86 release is 12.2 (as of 2008-12-10), which includes support for ALSA, GCC 4.2.4, Linux 184.108.40.206, KDE 3.5.10 and Xfce 4.4.3.
Download locations for Slackware 12.2 :