Microsoft Visual Studio Express is a set of freeware integrated development environments developed by Microsoft that are lightweight versions of the Microsoft Visual Studio 2008 (codenamed Orcas) product line. The idea of express editions, according to Microsoft, is to provide a streamlined, easy-to-use and easy-to-learn IDEs for less serious users, such as hobbyists and students. The final versions were released on November 19, 2007. In line with popular demand since the Visual Studio 2005 Express Editions , these editions will always remain free-of-charge. Visual Studio 2008 Express Editions require Windows XP or a later Windows version; Windows NT 4.0, Windows 2000 and Windows 9x are no longer supported. Visual Studio 2005 Express Editions can be installed on Windows 2000 SP4.