machine
Most SCADA stuff I know strictly runs on ISA-slot motherboards. Has to. Which is why one can easily buy those and probably will be able to for the next decades. One of my client had an incident where the old machine from the early 90's finally croaked. Whirrrrr ... CLUNK ... *PHUT*. A few days later they were back in business. ISA bus like usual, but this time the computer also had .. woohoo! .. a CD drive.