Tomorrow, April 4, 2025, Microsoft celebrates its 50th anniversary. Bill Gates has released a downloadable PDF of the original source code that started the company, which was initially named 'Micro-Soft'. The original code was created for the Altair 8800 using a teleprinter. Gates and Paul Allen developed the Altair BASIC interpreter, their first product, which aimed to democratize computing. They worked for two months to create the software after promising MITS a product that did not yet exist. Their collaborative effort laid the foundation for significant technological advancements over the past five decades.