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English definition of “firmware”

firmware

noun [U]     /ˈfɜːm.weər/ US  /ˈfɝːm.wer/
a set of instructions that form part of an electronic device and allow it to communicate with a computer or with other electronic devicesComputer programming and software
(Definition of firmware noun from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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