With the exception of Intel® Cluster Tools, Intel® Software Products are licensed to a named user rather than to a single computer. For Intel® Cluster Tools, the Single Developer license enables individuals to inexpensively obtain a license. The Cluster System license enables organizations and universities to cost-effectively purchase licenses for a large number of developers. There are two important characteristics of Cluster System licenses. First, the license is tied to a specific cluster, so if you have two clusters, you will need to purchase two separate Cluster System licenses. Second, the license is not a "concurrent use" or "floating" license. Single systems with mulitple CPUs can use a "named user license" (single user license).