Neat story but is the software really hidden? I feel like I have heard this story many times. It was one of the many feats of the Apollo program, I don't think I would consider it hidden.
As a casual space program buff, I thought the same. But I think most people do not realize how sophisticated this early computer and software were, and how important to the mission. The article emphasizes the well-calculated trust that the engineers and astronauts put into this first computer-controlled spaceflight operation.