Microsoft Developer Network (MSDN) is the portion of Microsoft responsible for managing the firm’s relationship with developers and testers, such as hardware developers interested in the operating system (OS), and software developers developing on the various OS platforms or using the API or scripting languages of Microsoft’s applications. The relationship management is situated in assorted media: web sites, newsletters, developer conferences, trade media, blogs and DVD distribution. The life cycle of the relationships ranges from legacy support through evangelizing potential offerings.
MSDN Library is a library of official technical documentation content intended for developers developing for Microsoft Windows. MSDN Library documents the APIs that ship with Microsoft products and also includes sample code, technical articles, and other programming information. It is available free on the web and on CDs and DVDs for paid MSDN subscribers. Initially, the disc version was only available as part of an MSDN subscription and was released on a quarterly basis (January, April, July and October). However, in recent times (2006 and later), it can be freely downloaded from Microsoft Download Center in form of ISO images for CD/DVD releases are no longer published quarterly. Instead, its release schedule is now aligned with major software releases (major Visual Studio release, major Windows release or service packs), (up to Visual Studio 2008).