OOOOppppeeeennnn IIIInnnnvvvveeeennnnttttoooorrrr 2222....1111 EEEExxxxeeeeccccuuuuttttiiiioooonnnn EEEEnnnnvvvviiiirrrroooonnnnmmmmeeeennnntttt is a performance
enhancement upgrade to Open Inventor 2.0 that runs on IRIX
5.3 and IRIX 6.1. It is required on any system that runs
Open Inventor 2.1 programs. There are a variety of programs
that require this subsystem and thus it is installed by