... unix¹

...and of unix-like systems, including Unix, POSIX, OpenBSD, NetBSD, FreeBSD, original BSD, AIX, HP/UX, A/UX, NeXT STEP. Oh, & Gnu/Linux.

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... list²

I'm using the term ``list'' loosely here. In Lisp, it really is a list. In C & C++, it's an array of pointers to strings, plus an integral length.

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... unix³

...on unix or unix-like systems, which includes Leeeenux ...

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