"It may surprise you to know that virtualization existed on
Mainframes for almost 3 decades before it existed on any other
platform. As I was researching a new virtualization project
involving IBM System z, z/VM, and Linux, I realized that
we’ve come full circle in computing -- from Mainframes and
dumb terminals to the wonderful world of mid-range computers,
departmental servers, and heavy desktops back to those dinosaur
days of yesteryear of Mainframes and dumb terminals. Could it be
true that we are returning to our roots as mere users on behemoth
systems where an administrator allocates a virtual resource slice
to us instead of a complete physical system with which to work? The
answer is yes. The answer is also no."
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