The rule that the organisation of the
software and the organisation of the software team will be
congruent; originally stated as "If you have four groups
working on a compiler, you'll get a 4-pass compiler".
Melvin Conway, an early proto-hacker, wrote an
assembler for
the Burroughs 220 called SAVE. The name "SAVE" didn't stand
for anything; it was just that you lost fewer card decks and
listings because they all had SAVE written on them.