Automation System
A common way to take x, y coordinates off a drawing is to use a

Direct view storage tube (DVST)
light pen
Tablet
None of these
digitiser

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Automation System
There are several procedures you can implement to provide maximum security. The most important of these is:

run regular simulated tests using TARP (testing of Applications Recovery Planes)
Verify the reputation of the people installing your system
None of these
do not allow unbonded service people to work on your equipment
do not leave training manuals unsecured

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