The text of the Resource Kit books are also available with versions of the Microsoft Developer Network (MSDN) CD-ROMs, and a large subset to complete set of the tools included in the kits can be downloaded from the Microsoft web site. The most common form of the Resource Kits are as a large book or box set of books which come with CD-ROM(s), both of which have been supplemented in some cases such as the Resource Kits for Windows NT Server versions 3.51 and 4.0 and Windows 2000 Server.