The official name of 
VMS is currently OpenVMS. VMS is a product of HP (HP bought Compaq after Compaq bought Digital). VMS currently supports two hardware platforms: VAX and Alpha, and the variants are known as VMS VAX and VMS Alpha (or OpenVMS VAX and OpenVMS Alpha). VMS support for Itanium (or IA-64) has been announced.
Also, Visual Motion Simulator: http://www-sdb.larc.nasa.gov/Simulations/Simulators/VMS/vms.html
8 pages link to VMS:
