5 Client Access Licenses only for use with the initial purchase of a license for Windows 2000 Server for installation on a computer without any other network operating system software legally installed. Allows client computers to access any Windows 2000 Server in a network. Required for any computer, including those running Windows for Workgroups, Windows 95, Windows 98, Windows NT Workstation, or Windows 2000 Professional. This is a license to install and use five additional copies of the software.