On 10 Dec 2017 23:13 -0700, from tuhs(a)minnie.tuhs.org (Grant Taylor via TUHS):
Does anyone know of any other similar history
discussion mailing
lists / newsgroups to discuss things like Mainframes or (Open)VMS?
Not a mailing list, but have you considered the Retrocomputing Stack
Exchange?
https://retrocomputing.stackexchange.com/
Many of the questions there currently relate primarily to personal
computers and consoles, but I see no reason why questions about e.g.
historical mainframes would not be welcome.
--
Michael Kjörling •
https://michael.kjorling.se • michael(a)kjorling.se
“People who think they know everything really annoy
those of us who know we don’t.” (Bjarne Stroustrup)