Microsoft is the company that launched the Windows operating system and ubiquitous office productivity programs like Word, Excel, and Powerpoint.David Ryder/Getty ImagesMicrosoft is a software company known for products like Windows, Microsoft 365, and Xbox.Microsoft is one of the largest software companies in the world by market cap.Microsoft was co-founded by Bill Gates, and the company is now led by CEO Satya Nadella.Microsoft is one of the world's largest software companies, with annual revenues nearing $250 billion in recent years.