CTSS->Multics->ITS->Unics/Unix->ICL VME->BSD->Xenix->Domain/OS->SunOS->Minix->NeXTSTEP->GNU Hurd->GNU+Linux->Solaris->NetBSD->FreeBSD->OpenBSD->macOS->iOS->Android->OpenSolaris->illumos.

Multics-like family: PRIMOS, Domain/OS, Stratus VOS.
Unics/Unix family: BSD, Xenix, SunOS, NeXTSTEP, Solaris, macOS, iOS, OpenSolaris, illumos.
Unix-like family: Domain/OS, Minix, GNU Hurd, GNU+Linux, NetBSD, FreeBSD, OpenBSD, iOS, Android.