Microsoft estimates that 1.5 billion people use the Windows operating system each day. There are various applications for Microsoft's products that reach into homes, businesses and entertainment venues.
According to Microsoft, over 1.1 billion people use Microsoft Office. Microsoft's gaming system Xbox Live has more than 48 million members throughout 41 countries.
Microsoft was first established in 1975 by Bill Gates and Paul Allen. The first operating system by Microsoft was a Unix-based OS named Xenix, but their first successful OS was MS-DOS, which evolved into the Windows operating system. Microsoft Windows eventually came to dominate the personal computer market with over 90 percent market share, overtaking the Mac OS.