Other freely available IBM operating systems available, OS/360, OS/VS1

If any of the links provided here are broken I would suggest checking www.cbttape.org as it seems to keep up-to-date links to everything.

The public domain distribution media for OS/360, DOS/360 and TOS/360, VM/370 and TSS/370 as well as Turnkey3 MVS3.8J were available at http://www.ibiblio.org/jmaynard/ last time I checked if you want to try to run the older operating systems yourself.