https://www.ibiblio.org/apollo/Documents/GeminiMinnickMathFlow.pdf https://www.ibiblio.org/apollo/Documents/GeminiMinnickMathFl... (large PDF) This is the flig

https://www.ibiblio.org/apollo/Documents/GeminiMinnickMathFlow.pdf https://www.ibiblio.org/apollo/Documents/GeminiMinnickMathFl... (large PDF) This is the flight software used in the Gemini spacecraft (1960s). The actual assembly code did not survive. It was considered sort of incidental. For the designers and coders then, the flowcharts were the program, the real source. There's more information about the Gemini software and how the programmers worked here: https://www.ibiblio.org/apollo/Gemini.html#Evolution_of_the_Flight_Software https://www.ibiblio.org/apollo/Gemini.html#Evolution_of_the_...