Both Nixdorf and Siemens were heavy into UNIX.  Both were founders of OSF.   Nixdorf OEM'ed a couple of machines from US firms, as well as making their own.   Siemens and Philips both trended to make their own systems.   IIRC Philips was mostly in the AT&T Camp at the time.  Olivetti was definitely since one of the original 386 systems AT&T tried to sell was their PC (in fact was one of systems ISC used for the original 386 UNIX port - supplied by AT&T).