Pre-Grant Publication Number: 20100268561
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Facilitator's Comment 
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Given this mass of prior work, one cannot claim that a new way to slice and dice systems, regardless whether it is made of 3, 10 or 100 levels, is novel or is non-obvious. The only criterion of patentability that is arguably met is the one of utility... although the utility of adding one more architectural model to the many that exist could be debated.
I have submitted a IBM Redbook publication which describes in great detail the architecture of the Z/OS operating system as prior art. Z/OS is the embodiment of an Enterprise Architecture.