I believe the Workplace OS connection was related to the use of Mach microkernel. I knew IBM was looking into at least one use of OSF/1 as shipped Unix, but was

I believe the Workplace OS connection was related to the use of Mach microkernel. I knew IBM was looking into at least one use of OSF/1 as shipped Unix, but wasn't sure which one (and AIX by middle 1990s was weird enough to confuse most people...)