Although Facebook is commonly identified as a PHP site there exists an archived version of Facebook's home page built with Coldfusion: https://web.archive.org/web/20120620044923/http://www.facebook.com/index.cfm . Ph.D researcher and Coldfusion consultant Karl Simanonok also remembers seeing index.cfm in the address bar when analysing an early version of Facebook around late 2004/early 2005 and recognised use of the Fusebox framework which he had used in his consulting work.