This post commemorates 50 years of Microsoft by highlighting the original source code of the company’s first product, a Basic interpreter. It notes that the software was undervalued in its early days, with the story of Bill Gates finding source code in a dumpster being key to Microsoft's inception. It emphasizes the historic significance of the source code and its impact on the software industry today. The linked documents include the source code itself (a large PDF) and additional resources charting Microsoft's journey.