
Discerning techies probably know of the the programming language
occam, designed for the
Inmos Transputer highly parallel processor from the 1980s. It's not so widely-known that occam is
still around and available for the x86 in the form of the Kent Retargetable occam Compiler,
KRoC - nor that there's an entire PC OS, complete with GUI, written in occam-pi:
RMoX.