This document discusses Microsoft's "Open Edge" strategy of combining open source software (OSS) with their commercial core products. It lists several ways Microsoft incorporates OSS, such as supporting PHP on IIS, jQuery in Visual Studio, OpenPegasus for System Center, and over 300 OSS components in SharePoint. It also discusses Microsoft contributions to OSS projects like Linux kernel drivers for Hyper-V, AMQP protocol support in Apache Qpid, and integrations with Moodle and Chem4Word. The strategy aims to provide customers choice and flexibility through an open hybrid environment.