This document discusses Microsoft's increasing collaboration with open source software. It notes that the number of open source applications on Windows grew by over 400% in a single year. It also discusses how Microsoft supports Linux, including allowing it to run as a virtual guest on Windows Server Hyper-V. Microsoft's Open Solutions Group works with partners and communities on unified solutions for mixed-source environments. The document outlines Microsoft's alliance with SUSE, citing benefits for customers like choice, interoperability, and openness across platforms. It discusses extending Microsoft's private cloud to also support the public cloud while maintaining consistency for Windows and Linux environments.