Well they put in an effort of 1400 man years for just the software. They even built an interpreter, because (flight/trajectory) requirements were changing all t

Well they put in an effort of 1400 man years for just the software. They even built an interpreter, because (flight/trajectory) requirements were changing all the time. Also: "The highest level of testing was performed with a high fidelity digital simulation of the computer, spacecraft hardware, and mission environment." http://klabs.org/history/history_docs/mit_docs/1711.pdf http://klabs.org/history/history_docs/mit_docs/1711.pdf