Automation System
Historically, central systems were used because:

memory was very expensive
All of these
semiconductor memory was not available
None of these
memory consumed a large amount of power

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Automation System
Sensors:

probably will not improve over the next decade
will be much smarter and more sophisticated in the future
are not important in automation
are easily developed
None of these

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Automation System
The program counter:

None of these
contains the address of the next instruction to be executed
is where arithmetic is done in a computer.
counts the number of instructions that have been executed
decides which program to run

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