"Programs tend to assume isolated use of dedicated hardware, so they have to resort to creating ludicrous numbers of virtual mainframes rather than letting the

"Programs tend to assume isolated use of dedicated hardware, so they have to resort to creating ludicrous numbers of virtual mainframes rather than letting the programs coexist" ----> Sounds like Windows VMWare/HyperV deployment justifications. :) There is a supposed higher security in zOS partitioning -- but I have no idea what EAL Levels really mean: http://en.wikipedia.org/wiki/Evaluation_Assurance_Level http://en.wikipedia.org/wiki/Evaluation_Assurance_Level