Check out the website it resides on : "web.archive.org". Also, "~billben/flathead.htm" is an archaic way to associate a directory of files to a website back when individual websites were too expensive or too difficult to set up. It looks to me that someone had the foresight to move that information to "cloud" storage where it can reside forever, rather than leaving it on an old website that would eventually disappear. Kudos to them!
