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Re:On the strange joys of mainframe OSes that have survived ... by throwawayallday on Sunday September 25, 2022 @07:18PM (#32977476)
OS/400 was developed alongside the AS/400. IBM introduced the AS/400 specifically as a "midrange system".

Source: me, two decades doing IBM sysprog on AS/400s and z/OS.

Re:On the strange joys of mainframe OSes that have survived ... by lproven on Monday September 26, 2022 @10:23AM (#32983499)
Yes, no argument there.

All I'd say is this: "midrange" is an IBM sales concept, and I don't think it was ever really used much outside IBM.

"Minicomputer" is a generally-accepted industry term, or at least, it was once. Minicomputers were not specific to IBM, just as mainframes weren't either.