Bill Gates and Paul Allen founded Microsoft in 1975 after their first mention of the company in a letter. Microsoft gave the first user-friendly operating system and is now a global company with over 110 subsidiaries. Microsoft has had major successes with products like Windows, Office, Xbox and more. It employs over 128,000 people and has annual revenue of over $86 billion from software sales and other sources. Microsoft continues to work on new technologies and products to remain a leader in the technology industry.