[TUHS] VFS prior to 1984

[Paul Ruizendaal]

When googling for File System Switch or Virtual File System most sources mention Sun NFS and SysVr3 as the earliest implementations. Some sources mention 8th Edition.

I did a (short) search  on FSS/VFS in earlier, non-Unix OS’s (Tenex, Multics, CTSS, etc.), but none of those seem to have had a comparable concept.

Does anybody recall prior art (prior to 1984) in this area?

Paul