On April 4, 2025, Microsoft celebrated its 50th anniversary. This milestone marked a reflection on the early beginnings of the company, which started with a small but significant piece of computer code written by Bill Gates 50 years ago. The code, which may seem outdated today, was a crucial step in the creation of Microsoft. Bill Gates and his friend Paul Allen were inspired by an article about the Altair 8800 minicomputer and decided to develop software for it. In 1975, while Gates was a freshman at Harvard, the duo contacted the Altair’s manufacturer, Micro Instrumentation and Telemetry Systems, claiming they had the software needed to operate the computer. At the time, they had not yet written the code but were determined to deliver on their promise.

After two months of hard work, Gates successfully completed the code using the BASIC programming language, developed at Dartmouth College in 1964. Although the pair did not have a prototype of the Altair, their commitment and dedication led to the creation of the first operating system for the Altair. This success became the foundation of what would grow into a multi-trillion-dollar company. The code not only marked the beginning of Microsoft but also signaled the start of a revolution in personal computing. The company went on to develop products such as Word, Excel, PowerPoint, and Windows, which changed the way people interacted with computers. With Microsoft now worth $2.8 trillion and under the leadership of Satya Nadella, Gates reflected on the incredible journey of the company, calling it “crazy that the dream came true.”