Microsoft MSDN - Platforms

An MSDN Subscription is the best way to get exactly what you need for your next challenging project. MICROSOFT OPEN VALUE SUBSCRIPTION OPTION With the Subscription option, you pay a single price per desktop (five desktop minimum) to deploy Microsoft technology as the standard across your organization, just as with the Company-wide option. However, the Subscription option provides you with rights to run the software only during the term of the agreement with Microsoft (nonperpetual).