An application doesn't have to be commercial, though, to be important. There are a number of reasons [explain them] well-written, reliable software might not be "shrink-wrapped".
I'm inclined to be inclusive in putting together this page. While I don't work with game software, for example, I recognize that even recreation can inspire good engineering. The examples below illustrate this.
[Distinguish from software in Larry's FAQs.]
submarines; Voyager; testing; consoles (AccessWare, NBC, observatories, E&P)
[... content ...]