The point is that PS/2 keyboards were not necessarily
attached to
PS/2s. They became an extremely widespread industry standard, even
beyond PC compatibles - e.g. later Acorn ARM RISC machines such as the
RiscPC and A4000 and A7000 used them, too, as did some PReP Mac
clones.
- Newer SGI machines (Indy, Octane, etc)
- PA-RISC machines (712/80, 9000/D210 - these I have and can attest)
- Most things that use external keyboards made after 1990
- (ops, I forgot other options)