The SharePoint Server device client access license (CAL) suite is a set of device CALs for SharePoint Server. It includes one standard device CAL and one enterprise device CAL.
The standard CAL authorizes one computer to access the services of SharePoint Server, regardless of the number of users (for example, on a shared workstation).
The enterprise CAL can be used only in conjunction with a standard SharePoint Server device CAL. It allows one computer to access the Enterprise Edition functionality of SharePoint Server.
User CALs are also available. A user CAL authorizes a user to access SharePoint Server from any device (for example, when an employee accesses the server from a computer at work and another at home).
License Only: This license does not require media, license keys, or setup codes.
Software Assurance: Under the Software Assurance program, you have the right to install any new release of products covered in the agreement during the term of your coverage.