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C00002 00002 4.7 Critique.
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4.7 Critique.
The most glaring flaw in the present data structure is that
there is two of them: a 2-D CRE structure and a 3-D GEOMED structure.
This difficulty arose because the directly addressible memory on
Stanford A.I. computer varies between 100K to 150K words. Although
the PDP-KA10 address space is 256K, there was no "virtual memory" or
paging and so the problem had to broken up in someway.