@mcc I worked at Tripod (owned by Lycos) when Lycos also acquired Angelfire. It turned out that the entire site (login, html editor, uploader, everything) was run on a single CGI that was written in C.

The CGI binary was named a.out, which I was told stood for “angelfire.out”.

This is unrelated to your 404 page, but I don’t get many chances to tell this story.