Microsoft Corporation is engaged in developing, licensing and supporting a range of software products and services. The Company also designs and sells hardware, and delivers online advertising to the customers. It operates in five segments: Windows & Windows Live Division (Windows Division), Server and Tools, Online Services Division (OSD), Microsoft Business Division (MBD), and Entertainment and Devices Division (EDD). The Company' products include operating systems for personal computers (PCs), servers, phones, and other intelligent devices; server applications for distributed computing environments; productivity applications; business solution applications; desktop and server management tools. In July 2012, Comcast Corp. acquired the Company's 50% stake in MSNBC.com. In October 2012, it acquired PhoneFactor Inc. On July 18, 2012, it acquired Yammer, Inc. (Yammer). Effective March 19, 2013, it acquired Netbreeze GmbH.