unixism: n. A piece of code or a coding technique that depends on the protected multi-tasking environment with relatively low process-spawn overhead that exists on virtual-memory UNIX systems.

:unixism: n. A piece of code or a coding technique that depends on
the protected multi-tasking environment with relatively low
process-spawn overhead that exists on virtual-memory UNIX systems.
Common {unixism}s include: gratuitous use of `fork(2)'; the
assumption that certain undocumented but well-known features of
UNIX libraries such as `stdio(3)' are supported elsewhere;
reliance on {obscure} side-effects of system calls (use of
`sleep(2)' with a 0 argument to clue the scheduler that you're
willing to give up your time-slice, for example); the assumption
that freshly allocated memory is zeroed; and the assumption that
fragmentation problems won't arise from never `free()'ing
memory. Compare {vaxocentrism}; see also {New Jersey}.
-- The AI Hackers Dictionary