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Perpetual licenses belong to the "license" software category and require a one-time upfront purchase, in contrast to traditional CSP, being a monthly subscription model. The Perpetual License software in the CSP includes popular desktop tools such as Visio, Project, and Office Suites as well as the Office components i.e. Word, Excel, and PowerPoint. Also, infrastructure servers are included, such as Windows Server, SQL Server, and Biztalk Server. Productivity servers include Exchange, SharePoint, Skype for Business, and Project Server.
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