I know for a fact that IBM offered p-System for the
PC, because I have a
copy of *IBM's* p-System and all its manuals (binder-in-box) for the PC.
The binders are blue. The PC-DOS ones are beige/tan, if my memory
serves me.
One of them is pink, I forget if that's PC-DOS or BASIC, but probably the
latter.
Technical reference manuals are purple, Hardware Maintenance and Service
(boardswapper guides) are dark blue, and Guide to Operations are red. The
former are the ones I tend to read...
-tony