Analog: A signal that is received in the same form in which it is transmitted, while the amplitude and frequency may vary.

Amplitude: The amount of variety in a signal. Commonly thought of as the height of a wave. American Standard Code for Information Interexchange (ASCII): A computer language used to convert letters, numbers, and control codes into a digital code understood by most computers.

Asynchronous: Communication in which interaction between parties does not take place simultaneously.

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