True, but you can install KICKS instead of CICS ;) But you are right, if you want that, got to zexplore. If you want a taste of Mainframes then MVS and VM/370

True, but you can install KICKS instead of CICS ;) But you are right, if you want that, got to zexplore. If you want a taste of Mainframes then MVS and VM/370 are a excellent starting point. BTW: If you understand "Berkeley Unix...whatever that is" then Linux is a piece of cake...not that ~much has changed.