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The input devices in CAD can be divided into:

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The input devices in CAD can be divided into:

(a) 2

(b) 5

(c) 3

(d) 4

The question was asked in class test.

My question is from Computer-Aided Design in section Other Major Topics in Civil Engineering of Basic Civil Engineering

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The correct option is (c) 3

To explain: The input devices can be divided into three general categories. These are cursor control devices (direct keys on keyboard, joysticks, tracker ball, etc.), digitizers (large smooth board with an electronic tracking device) and alphanumeric and other keyboard terminals.

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