True but then it was somewhat a fashion of the time to add Open to things (marketing trying to capitalise upon the Opensource movement heh). For VMS the history is:

"In July 1992, DEC renamed VAX/VMS to OpenVMS as an indication for its support of open systems industry standards such as POSIX and Unix compatibility, and to drop the VAX connection since a migration to a different architecture was underway."

What else are we going to congratulate them for, not requiring licensing to open a new TCP socket?