What Is It?
ColdFusion, developed by Allaire, is a complete Web application server for developing and delivering scalable e-business applications. The ColdFusion solution consists of two related packages:

ColdFusion Studio –Tightly integrated with ColdFusion Server, ColdFusion Studio provides visual programming, database, and debugging tools for building sophisticated Web applications.

ColdFusion Server –ColdFusion Server offers all the runtime services for delivering your e-business applications built on a highly scalable and open architecture.

How Does It Work?
1) Your browser requests a web page containing CFML (Cold Fusion Markup Language) from the Web Server.
2) The Web Server sends any Cold Fusion requests to the Cold Fusion Server.
3) The Cold Fusion Server returns the processed request as HTML Code to the Web Server.
4) The Web Server sends final HTML code to your web browser.

What is Related?

Cold Fusion Enabler