How did you get copies of zOS, DB2, CICS, etc.? I've played around with Hercules and really old versions of VM/CMS and MVS, but nothing modern, as I didn't thin

How did you get copies of zOS, DB2, CICS, etc.? I've played around with Hercules and really old versions of VM/CMS and MVS, but nothing modern, as I didn't think that one could legally do it. Maybe that's changed. I think it would really be in IBM's interests to make their z-series software accessible for those who want to learn on Hercules.