Those 420,000 lines had exactly one fully documented, well-understood bug. This was totally unheard-of. The very best commercial software written to that length would have suffered about 5,000 bugs. The KH-13’s software was the dullest, least creative, most focused, most disciplined software that Van had ever seen. It scared him. It was sober, detailed, frighteningly methodical. The code’s design specs alone ran to thirty volumes.