First, let me tell you a little about ColdFusion.
ColdFusion is a server side scripting language, which is executed by the ColdFusion application server. ColdFusion works by executing CFM templates, a mixture of HTML and ColdFusion instructions to return normal HTML to the requesting browser. Often this will have included retrieving data from a database and generating web pages on the fly.
The ColdFusion (CF) application server was first developed in 1995 by JJ Allaire and is currently up to version 4.5. It exists in many incarnations, CF Express, free but fairly limited in it's power, ColdFusion Professional, just about all the features that ColdFusion server offers and ColdFusion Enterprise with advanced load balancing and the ability to spread tasks over a number of servers with advanced security features