There is this OpenVMS Release History which has some useful information. It only goes back to V4.0:
http://h71000.www7.hp.com/openvms/os/openvms-release-history.html http://h71000.www7.hp.com/openvms/os/openvms-release-history.txt Here is a copy of the SPD 25.01.69 for HP OpenVMS Operating System for Alpha Version 7.3-1 and 7.3-2, and VAX Version 7.3: http://h71000.www7.hp.com/doc/spdalpha731732vax73.pdf >From the above SPD 25.01.69: System Restrictions OpenVMS VAX Version 5.1-1 is the final version to support the following systems: VAX-11/725 OpenVMS VAX Version 6.2 is the final version to support the following systems: VAX-11/730 VAX-11/750 VAX-11/751 VAX-11/780 VAX-11/782 VAX-11/785 VAXft 110 VAXft 310 VAXft 410 VAXft 610 VAXft 810 MicroVAX I VAXstation I OpenVMS VAX Version 7.2 is the final version to support the following systems: MicroVAX II VAXstation II/GPX VAXstation II/QVSS VAXstation 2000 VAXstation 2000/GPX VAXstation 2000/MFB MicroVAX 2000 OpenVMS VAX Version 7.3 is the final version to support the following systems: VAX 8200, VAX 8250, VAXserver 8200, VAXserver 8250 VAX 8300, VAX 8350, VAXserver 8300, VAXserver 8350 VAX 8530, VAXserver 8530, VAX 8550, VAXserver 8550 VAX 8600, VAX 8650, VAXserver 8600, VAXserver 8650 VAX 8700, VAXserver 8700 VAX 8800, VAX 8810, VAX 8820, VAX 8830, VAX 8840 VAXserver 8800, VAXserver 8810, VAXserver 8820, VAXserver 8830, VAXserver 8840, VAX 8842, VAX 8974, VAX 8978 VAX 9000, Models 110, 110VP, 210, 210VP, 310, 310VP VAX 9000, Models 320, 320VP, 330, 330VP, 340, 340VP VAX 9000, Models 410, 410VP, 420, 420VP, 430, 430VP, 440, 440VP
