How was Linux created by a college student in his bedroom?

The answer

In 1991, Finnish computer science student Linus Torvalds began writing a free operating system kernel as a personal project, famously posting online: 'I'm doing a (free) operating system (just a hobby, won't be big and professional).' That hobby became Linux, which now powers most of the world's web servers, all of the top 500 supercomputers, all Android phones, and much of the cloud infrastructure behind AWS, Google, and Facebook. Torvalds made the code open source under the GPL license, enabling thousands of developers worldwide to collaborate on what became the most important operating system kernel in history.