Active Server Pages. A Microsoft technology, ASP is a scripted language that is processed by the Web server when a user accesses the Web page. ASP pages can be quickly identified by their extension .asp, or .aspx, the more recent version of ASP. Like other scripting languages used on the Web, the primary aim of ASP is to be able to handle dynamic content, frequently-changing information, and accessing other information systems like databases. ASP is based on the Visual Basic programming language.