Common Unixisms include: gratuitous use of "fork"; the

assumption that certain undocumented but well-known features

of Unix libraries such as "stdio" are supported elsewhere;

reliance on obscure side-effects of system calls (use of

"sleep" with a 0 argument to tell 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 freeing memory.