Template:Beta software Atlas is Microsoft's codename for a set of extensions to ASP.NET for implementing Ajax functionality.
Including both client-side and server-side components, Atlas allows the developer to create web applications in ASP.NET 2.0 which can update data on the web page without a complete reload of the page (a "round trip" to the server). The key technology which enables this functionality is the XMLHttpRequest method, along with Javascript and DHTML. Atlas is a free add-on to .NET.