The packaging of ASP.NET 2.0 AJAX can be fairly confusing. The basics of the packaging are.

• ASP.NET 2.0 AJAX Extensions 1.0—The ASP.NET 2.0 AJAX Extensions 1.0, also referred to as the RTM/Core code, is an independent download. This contains the functionality that will receive support from Microsoft in the initial release of the product. The source code is AVAILABLE.
• ASP.NET AJAX Futures Community Technology Preview (CTP) — The ASP.NET 2.0 AJAX framework contains a set of functionality that is experimental in nature. This functionality will eventually become integrated with the RTM/Core code. During the initial release, the Futures CTP functionality will be a separate download from the RTM/Core bits. This will not receive specific support from Microsoft beyond community-based support. The CTP bits require that the RTM/Core bits already be installed for the CTP bits to be installed. The CTP is also referred to as Value-Added Bits.
• Microsoft AJAX Library—The Microsoft AJAX Library is a set of JavaScript client libraries that MAKE up the standard download to a web browser and provide much of the support for AJAX in the client. These libraries will work with a non-IIS server and are available as a separate download. This library is INCLUDED in the ASP.NET 2.0 AJAX Extensions 1.0 download as well as being available as a separate download.
• ASP.NET AJAX CONTROL Toolkit — The AJAX Control Toolkit is a separate download that provides a set of client-side GUI widgets that integrate with the ASP.NET 2.0 AJAX framework. The toolkit is licensed SEPARATELY from the framework and includes the source code for developers who would like to review the source.

The packaging of ASP.NET 2.0 AJAX can be fairly confusing. The basics of the packaging are.