Automation System
A LISP environment consists of a language, a programming environ-ment, and:

a processor
a large address
a set of functions
random-access storage
None of these

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Automation System
The SKETCHPAD system

All of these
None of these
consisted of an cathode-ray oscilloscope driven by a Lincoln Tx2 computer where by graphical information was displayed on the screen.
is used for interactive Graphics
is expensive because it is sophisticated and make demands on the power and resources of the computer.

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Automation System
D/A (digital to analog) conversion:

has to be sampled at 1/2 the highest input frequency
results in a binary code as the final output
both (b) and (c)
None of these
must be fed through a filter to reproduce the original signal accurately

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