This should be the 3rd disk from the original 3-disk set (according to the info found on the web - unfortunately I don't have the original disks as well). It contains drivers for OS/2. Not sure how much people will find this useful, but I like the drivers to be complete. Found at "www.vobis.de/bbs/firmen/cirrus/5429/", where the first two disks can be found as well. They are already available at dDriverGuide.com and are identical.