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== Open source operating systems ==
Some [[Free Software Foundation|FSF]]-approved projects strive to provide a [[Free software movement|free]] operating system and will remove all binary blobs when no documentation for hardware or [[source code]] for device drivers and all applicable firmware is available; such projects include [[Linux-libre]] kernel packaging from [[FSFLA]], [[Parabola (software)|Parabola]], [[Devuan]], [[Trisquel]], and [[LibreCMC]].{{r|gnu/free-distros}} However, the vast majority of open-source projects make a distinction between binary-only device drivers (blobs) and binary-only firmware (not considered blobs{{r|kerneltrap/6497|p=...|q=Firmwares are not considered blobs by some people}}), allowing for certain proprietary firmware to be freely distributed as part of their kernels, and, to the disagreement of some core contributors, also support the use of proprietary device drivers that are distributed externally, providing internal compatibility interfaces for such proprietary drivers and userspace components to work with their system.{{r|f-aac|f-aacraid}} Projects following this policy include the [[Linux kernel]] itself, [[NetBSD]], [[FreeBSD]], [[DragonFly BSD]], and most [[Linux distribution]]s.<ref name="bsdinterview">{{cite web | url = http://os.newsforge.com/os/05/06/09/2132233.shtml?tid=8&tid=2 | title = BSD cognoscenti on Linux | access-date = 2006-07-07 | last = Matzan | first = Jem | date = 15 June 2005 | publisher = NewsForge | url-status = dead | archive-url = https://web.archive.org/web/20060323022626/http://os.newsforge.com/os/05/06/09/2132233.shtml?tid=8&tid=2 | archive-date = 23 March 2006 }} See Christos Zoulas's response to "Is sharing between Free/Open/NetBSD and the Linux kernel a common occurrence? And if so, does it go both ways?"</ref> Some of these projects do provide options for building the system without proprietary firmware, thus excluding sourceless microcode on demand.<ref name=f-sourceless-ucode>{{cite web |url= http://bxr.su/f/tools/build/options/WITHOUT_SOURCELESS_UCODE |title= build/options/WITHOUT_SOURCELESS_UCODE |website= BSD Cross Reference |publisher= [[FreeBSD]] |date= 2012-02-04}}</ref>
The [[OpenBSD]] project has a notable policy of not only not accepting any binary device drivers into its source tree, but also officially not supporting any third-party proprietary device driver components on its platform, either;{{r|lyrics-38|p=38...|q=we refuse to accept our users being forced into depending on vendor binaries}} citing not only the potential for undetectable or irreparable security flaws, but also the encroachment onto the openness and freedom of its software.<ref name="deraadt_interview_200605">{{citation
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