You seem to be confused. Domino had little to do with OS/2. OS/2 was once one of the supported platforms for Domino (along with several others), but IBM continu

You seem to be confused. Domino had little to do with OS/2. OS/2 was once one of the supported platforms for Domino (along with several others), but IBM continued active Domino development for many years after they gave up on OS/2. The "old greybeards" who built Domino came from Iris Associates which was completely separate from the team that built OS/2.