There are many mirrors of the Red Hat FTP site. An up-to-date list can always be found at:

There have been many now. Here's a rundown:

• Preview (or Beta) - Summer 1994
• Halloween - Fall 1994
• Mother's Day 1.0 - Summer 1995
• Mother's Day 1.1 - Late Summer 1995
• Red Hat Linux 2.0beta - Late Late Summer 1995
• Red Hat Linux 2.0 - Early Fall 1995
• Red Hat Linux 2.1 - Late Fall 1995
• Red Hat Linux/AXP 2.1-Beta - Late Fall 1995
• Red Hat Linux/AXP 2.1 - January 1996
• Red Hat Linux 3.0.3 (Picasso) - March 1996
• Red Hat Linux (Rembrandt beta) - August 1996
• Red Hat Linux 4.0 (Colgate) - October 1996
• Red Hat Linux 4.1 (Vanderbuilt) - January 1997
• Red Hat Linux 4.2 (Biltmore) - May 1997
• Red Hat Linux (Thunderbird beta) - May 1997
• Red Hat Linux (Mustang beta) - May 1997
• Red Hat Linux 5.0 (Hurricane) - December 1997
• Red Hat Linux 5.1 (Manhatten) - June 1998
• Red Hat Linux 5.2 - Oct 1998

The current version of Red Hat Linux is 5.2, and is available for Intel (386, 486, and various Pentiums), Alpha (various types), and SPARC.