# Apollo 11 Guidance Computer Source Code Released Original software for lunar and command modules now publicly available. - **Source:** [Hacker News](https://news.ycombinator.com) - **Published:** 2026-07-22 - **Topic:** [Business](https://brifing.si/c/business) - **Original article:** - **On Brifing:** https://brifing.si/s/93446e10-429b-434f-9e61-2e372cc9ddde ## Digitization of Historic Software The original source code of the Apollo Guidance Computer (AGC) used in the Apollo 11 mission has been digitized through a collaboration between Virtual AGC and MIT Museum. This project aims to preserve the software heritage of the historic space mission. The code for both the Command Module (Comanche055) and Lunar Module (Luminary099) is now available for public examination. ## Technical Details and Revisions The source code includes software versions named Colossus 2A (Command Module) and Luminary 1A (Lunar Module). The code was compiled by NASA in 1969 and developed at MIT's Instrumentation Laboratory. The project was led by Margaret H. Hamilton and her team of programmers. ## Open to Community Contributions The digitized code is shared in a public GitHub repository. Users can contribute by correcting inconsistencies between transcriptions and original scans. The project aims to enhance the accuracy of this historic software through open-source development principles. ## Historical Significance of the Software The AGC was optimized to work with 1960s hardware constraints (64KB ROM, 4KB RAM). This system performed critical calculations during the lunar landing and is considered a pioneer of modern embedded systems. Even legendary comments like 'Burn Baby Burn' have been preserved in the code. ## Compilation and Simulation Capabilities Enthusiasts can compile this code to run on original hardware through the Virtual AGC project. Physical documents scanned by Paul Fjeld of MIT Museum were digitized under Deborah Douglas's coordination. The project serves as a unique resource for space history enthusiasts. ## Software Legacy of Space Exploration This release documents early software engineering practices in human spaceflight. The AGC code demonstrates how software was designed to reliably execute critical missions despite hardware limitations. This illuminating work will inspire future generations of engineers and space explorers. ## Sources covering this story - https://github.com/chrislgarry/Apollo-11 — --- _Summary written by Brifing from the original reporting. Copyright in the original article belongs to its publisher; read the full piece at the link above._