"circuitry : (countable) A specific system of electrical circuits in a particular device;..."

“circuitry : (countable) A specific system of electrical circuits in a particular device; (uncountable) the design of such a system.
(uncountable) Electrical circuits considered as a group.
(uncountable, figuratively) The brain’s neural network.”

- https://en.wiktionary.org/wiki/circuitry#English

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