Apparently in 1990, Intel still sold complete systems, and they were PC compatible at that point. And perhaps not surprisingly, Intel also OEMed MS OS/2 1.21:
And there was this cute ASCII-art logo:
There very little customization that Intel did, the biggest difference from standard MS OS/2 1.21 was that Intel shipped additional DISK01.SYS driver which was in fact standard Adaptec ASW-1420 driver for 154x HBAs (actually 1x4x, presumably also covering EISA if not MCA). That supported the Adaptec 1542 SCSI controller used in the Intel 303 (386/33) tower system that these MS OS/2 disks came with.
Big thanks to a helpful reader.