Active Server Pages (ASP) is a technology developed by Microsoft for making advanced web pages. The most common language for programming ASP is VBScript. It is generally only available Microsoft Windows based servers, although there is also a version for Unix servers called SunOne ASP (formerly Chillisoft ASP). SunOne ASP isn't as stable as real ASP and doesn't support all the features that ASP does. There are plenty of online ASP resources to help you get started.
ASP.net is the next generation ASP technology which allows you to use any .net-enabled language to program your site. The 2 most common languages for .net web programming are VB.net and C#. These languages are both good choices for desktop and web applications. VB.net is perhaps easier to learn, whilst C# is used more widely for enterprise applications.
