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A '''proprietary device driver''' is a closed-source [[device driver]] published only in [[binary code]]. In the context of [[free and open-source software]], a [[Proprietary software|closed-source]] device driver is referred to as a '''blob'''{{r|lyrics-39|p=39|q=Blob!}} or '''binary blob'''. The term usually refers to a closed-source [[Loadable kernel module|kernel module]] [[Linker (computing)|loaded]] into the [[Kernel (computer science)|kernel]] of an open-source [[operating system]], and is sometimes also applied to code running outside the kernel, such as system [[firmware]] images, [[microcode]] updates, or [[User space|userland]] programs.<ref>{{cite web
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