Microsoft is a worldwide leader in software and services founded in 1975. It is best known for operating systems like Windows, productivity software like Office, and other products and services. Microsoft has over 120 subsidiaries worldwide, 118,000 employees in 2015, and annual revenue of over $93 billion. It focuses on building platforms and services for mobile and cloud computing. Microsoft has major operations centers in Dublin, Ireland, Humacao, Puerto Rico, and Singapore. In India, Microsoft employs over 6,500 people through its subsidiary to partner with the government and IT industry.