High Quality Content by WIKIPEDIA articles! Active Server Pages (ASP), also known as Classic ASP or ASP Classic, was Microsoft`s first server-side script engine for dynamically-generated Web pages. Initially released as an add-on to Internet Information Services (IIS) via the Windows NT 4.0 Option Pack (ca. 1998), it was subsequently included as a free component of Windows Server (since the initial release of Windows 2000 Server). ASP.NET has superseded ASP.