Used by
Older Pfaff creative machines.
What it keeps
Stitch positions, moves, colour stops and exact colours.
What it can't hold
Trims. Rounding to 0.1 mm can also move a stitch by a tiny fraction of a millimetre when you convert away from it.
What to watch for
Hoopbench opens PCS but does not write it, so you can only convert away from it.
Best for
Reading old files so that you can bring them into a current format.