Having worked with various open-source projects, finding something as historically significant as the Apollo 11 flight software available for free is a rare treat. This software, written primarily in Assembly language for the Apollo Guidance Computer (AGC), was integral to the mission’s success in 1969. Digitized by dedicated teams including contributors from Virtual AGC and the MIT Museum, this repository preserves both the Command Module’s program, known as Comanche 055, and the Lunar Module’s program, Luminary 099. Exploring this code not only provides insight into one of the most important software engineering feats of the 20th century but also reveals the meticulous care NASA engineers put into mission-critical programming. The involvement of Margaret H. Hamilton and her team, who led the development of the Colossus 2A program, is well documented, showing their pioneering role in software reliability. For coding enthusiasts or those interested in aerospace history, this repository offers a unique opportunity to see how software was written without modern tools and languages. The entire codebase is assembled in low-level Assembly tailored for the AGC’s architecture. If you ever wanted to compile the source, check the work done by Virtual AGC who have created tools and documentation to assist with this. Moreover, this project actively invites contributions and corrections through pull requests, ensuring the historical accuracy and ongoing preservation of the source code. For anyone curious about the evolution of software development, witnessing the original Apollo 11 guidance computer source code firsthand is both educational and inspiring. Reviewing the source also highlights how open-source efforts can bridge history and modern technology, allowing new generations to appreciate the complexities and challenges faced during space exploration. Ultimately, this project connects technology, history, and culture, underscoring software’s pivotal role in human achievement.