Microsoft Corporation produces a wide range of products and services, from computer software to consumer electronics. The company was founded in 1975 and has its headquarters in Washington DC but also operates worldwide as well through offices located at more than ten countries across six continents. Microsoft is best known for its Windows operating system and the Microsoft Office suite of productivity software, each of which has achieved near-ubiquity as a de facto standard in their respective areas. Microsoft was founded on April 4, 1975, by Bill Gates and Paul Allen. The company's current public (MSFT) stock is valued at around US$40 billion, and as of June 2010 it was the world's largest software maker by revenue, and one of the world's most valuable companies. Microsoft is consistently ranked in the Fortune 500 list of largest U.S. corporations (Top 30 in 2009) and the Forbes Global 2000 list (Top 50). Microsoft’s product offering has be named a Leader in eight Forrester Wave Reports and in five Gartner Magic Quadrant Reports. This includes the 2021 Gartner Magic Quadrants for Access Management and for Unified Endpoint Management Tools. Microsoft’s Defender product also scored highly in 2021 MITRE ATT&CK Evaluation with a Visibility of 151/174.