It was the first Unix I encountered. This was on a 32-processor 80286 Intel iPSC that was obsolete, but one of the university professors either knew someone, or wrote a good enough proposal that they were grateful to unload it on him.
The processor cards were arranged in a hypercube configuration, and you had a manager computer that would load operating system images onto them at boot time. They had libraries that gave you messaging capabilities, and I somehow managed to get it to sort strings in parallel across them. Badly, I'm sure. But hey, college student.
https://en.wikipedia.org/wiki/Intel_iPSC
The processor cards were arranged in a hypercube configuration, and you had a manager computer that would load operating system images onto them at boot time. They had libraries that gave you messaging capabilities, and I somehow managed to get it to sort strings in parallel across them. Badly, I'm sure. But hey, college student.