> SysVr2.x for VAX and 3b2 also defined 'unix'. I sort of remember some
> variant of 7th Edition doing so as well, but I've not yet setup and
> booted the virtual PDP-11 with V7, so can't (yet) confirm that memory! ;-)
I tried it on V6 and V7 (in the PDP emulator). V6 does not define
'unix', but V7 does.
-- Lennart