Yammer (www.yammer.com) is a best-in-class Enterprise Social Network (ESN) used by more than 500,000 organizations worldwide ? including approximately 85 percent of the Fortune 500 - to connect and communicate. Yammer brings together employees, content, conversations, and business data in a single location. Founded in 2008, Yammer was acquired by Microsoft and is available with Office 365, to deliver a comprehensive, seamless social experience across the applications people already use. Together, Yammer and Office 365 form the core of Microsoft?s vision for Enterprise Social: to enable companies to work like a network. By connecting individuals to a dynamic network of people and information, we help companies listen, adapt, and grow in new ways, enabling them to better understand their customers, respond faster together, and deliver innovative products and personalized experiences. The service can be accessed through the web, desktop, and mobile devices including Windows Phone, iPhone, iPad, and Android. With a Freemium model, Yammer enables employees to voluntarily adopt the service. A premium version is available with Office 365 and includes additional administrative and security controls, integration with other applications, customer support, and customer engagement services.