A popular acronym for "principal ideal domain." In engineering circles, the acronym PID refers to the "proportional-integral-derivative method" algorithm for controlling systems.
PID
See also
Principal Ideal Domain, Principal Ring, Proportional-Integral-Derivative MethodThis entry contributed by Todd Rowland
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Cite this as:
Rowland, Todd. "PID." From MathWorld--A Wolfram Web Resource, created by Eric W. Weisstein. https://mathworld.wolfram.com/PID.html