Final answer:
A binary device is one that has only two possible states: on or off. The on/off button on a calculator is an example of a binary device.
Step-by-step explanation:
The answer is the on/off button on a calculator. A binary device is one that has only two possible states: on or off, true or false, 1 or 0. The hour hand of a clock, on the other hand, is an analog device that continuously moves and can have an infinite number of positions between two values. The on/off button on a calculator is a binary device because it can only be in one of two states: pressed (on) or not pressed (off).
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