Felix on Nostr: Later releases of BSD provided the basis for several open-source operating systems ...

Later releases of BSD provided the basis for several open-source operating systems including FreeBSD, OpenBSD, NetBSD, DragonFly BSD, Darwin and TrueOS. These, in turn, have been used by proprietary operating systems, including Apple's macOS and iOS, which derived from them[2] and Microsoft Windows XP, which used (at least) part of its TCP/IP code, which was legal.[3][better source needed] Code from FreeBSD was also used to create the operating systems for the PlayStation 5,[4] PlayStation 4,[5] PlayStation 3,[6] PlayStation Vita,[7] and Nintendo Switch.[8][9]

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