Active Server Page (an HTML file containing a Microsoft server-processed script)
ASP is a file extension for the Active Server Page file format used by an HTML file containing a Microsoft server-processed script. An ASP files’ scripts are processed on a Microsoft Web server before the page is sent to the user, usually tailoring a page for the user.
Typically, the script in the Web page at the server uses input received as the result of the user's request for the page to access data from a database and then builds or customizes the page on the fly before sending it to the requestor.
An ASP is somewhat similar to a server-side include or a common gateway interface (CGI) application in that all involve programs that run on the server. ASP is a feature of the Microsoft Internet Information Server (IIS), but, since the server-side script is just building a regular HTML page, it can be delivered to almost any browser.
Learn more about ASP files:
The If it has a plug, it's IT stuff blog covers Active Server Pages.
Visit the ASP Resource Index webpage.
Search for answers to ASP-related questions at IT Knowledge Exchange features questions and answers about Microsoft IIS.