port of the UNIX System V operating system for Intel x86 by Interactive Systems Corporation) IRIX from SGI MeikOS NeXTSTEP (developed by NeXT; a Unix-based OS based on the Mach microkernel) OS-9 Unix-like RTOS. (OS from Microware for Motorola 6809 based microcomputers) OS9/68K Unix-like RTOS. (OS from Microware for Motorola 680x0 based microcomputers; based on OS-9) OS-9000 Unix-like RTOS. (OS from Microware for Intel x86 based microcomputers; based on OS-9, written in C) OSF/1 (developed into a commercial offering by Digital Equipment Corporation) OPENSTEP QNX (POSIX, microkernel OS; usually a real time embedded OS) Rhapsody (an early form of Mac OS X) RISC iX – derived from BSD 4.3, by Acorn computers, for their ARM family of machines RISC/os (a port by MIPS Technologies of 4.3BSD for its MIPS-based computers) RMX SCO UNIX (from SCO, bought by Caldera who renamed themselves SCO Group) SINIX (a port by SNI of Unix to the MIPS architecture) Solaris (from Sun, bought by Oracle; a System V-based replacement for SunOS) SunOS (BSD-based Unix system used on early Sun hardware) SUPER-UX (a port of System V Release 4.2MP with features adopted from BSD and Linux for NEC SX architecture supercomputers) System V (a release of AT&T Unix, 'SVR4' was the 4th minor release) System V/AT, 386 (The first version of AT&T System V UNIX on the IBM 286 and 386 PCs, ported and sold by Microport) Trusted Solaris (Solaris with kernel and other enhancements to support multilevel security) UniFLEX (Unix-like OS from TSC for DMA-capable, extended addresses, Motorola 6809 based computers; e.g. SWTPC, Gimix and others) Unicos (the version of Unix designed for Cray Supercomputers, mainly geared to vector calculations) UTX-32 (Developed by Gould CSD (Computer System Division), a Unix-based OS that included both BSD and System V characteristics. It was one of the first Unix based systems to receive NSA's C2 security level certification.) Zenix, Zenith corporations Unix (a popular USA electronics maker at the time) Non-proprietary Unix or Unix-like MINIX (study OS developed by Andrew S. Tanenbaum in the Netherlands) BSD (Berkeley Software Distribution, a variant of Unix for DEC VAX hardware) FreeBSD (one of the outgrowths of UC Regents' abandonment of CSRG's 'BSD Unix') DragonFlyBSD, forked from FreeBSD 4.8 MidnightBSD, forked from FreeBSD 6.1 GhostBSD TrueOS (previously known as PC-BSD), made for desktop/laptop usage, now discontinued NomadBSD, a german project aiming to tend FreeBSD to desktop/laptop needs NetBSD (an embedded device BSD