Windows Terminal Server 2003 - 25 Device CALs
Terminal Services functionality in Windows Server 2003 lets you remotely execute applications on a Windows-based server from a wide range of devices over virtually any type of network connection. A server running Terminal Services can be referred to as a Terminal Server (TS). A TS Device CAL permits one device (used by any user) to conduct Windows Sessions on any of your servers.
This is an add-on product to Windows Terminal Server 2003 - this does not include the actual server. This licenses an additional 25 users.