The ColdFusion application server
The ColdFusion application server is itself a web application that typically resides on the same computer as your web server software. It is the program that parses (reads and interprets) and processes supplied instructions. These instructions are passed to ColdFusion through ColdFusion pages, which use a .cfm or .cfc filename extension. A ColdFusion page looks like an HTML page, but contains special tags that instruct the ColdFusion server to perform specific operations.