I never heard about this '***' Unix, what is it?


  
Here's a brief list of some well-known (commercial/PD) Unices. Any comment and/or new submission welcomed.


Unix Name Description
AIX IBM's Unix, based on SVR2 with varying degrees of BSD extensions, for various hardwares. Proprietary system admin (SMIT). Quite different from most Unices and among themselves. AIX/ESA, runs native on S/370 and S/390 mainframes, based on OSF/1. AIX was to have been base for OSF/1 until Mach was chosen instead.
AOS (IBM) 4.3BSD port to IBM PC RT (for educational institutes).
A/UX Apple's Unix. SV with Berkeley enhancements, NFS, Mac GUI. System 7 runs as guest of A/UX (opposite of MachTen). X11R4, MacX, TCP/IP, NFS, NIS, RPC/XDR, various shells, UFS or S5FS. Apple has decided to drop A/UX (will go for AIX now that they're together with IBM on the PPC)
BOS Bull's DPX/2 (680x0). SVR3 with BSD extensions (FFS, select, sockets), symmetric MP, X11R3, job control, disk mirroring, C2 security, DCE extensions. There's also BOS/X, and AIX-compatible Unix for Bull's PPC workstations.
386BSD Jolitz's port of Net/2 software. Posix, 32-bit, still in alpha.
Coherent By Mark Williams Company. For 80286. Unix clone compatible with V7, some SVR2 (IPC). V4.0 is 32-bit. Mark Williams closed down early '95.
DC/OSx Pyramid machine. SVR4
DELL UNIX DELL Computer Corp. SVR4
DomainOS By Apollo, now HP. Proprietary OS; layered on top is BSD4.3 and SVR3 (a process can use either, neither or both). Development now stopped, some features now in OSF/1 (and NT).
DYNIX Sequent machines. 4.2BSD-based
EP/IX Control Data Corp. For MIPS 2000/3000/6000/4000; based on RISC/OS 4 and 5, POSIX-ABI-compliant. SVR3, SVR4 and BSD modes.
FreeBSD 386bsd 0.1 with the patchkit applied, and many updated utilities
HP-UX From HP. BSD based, for HP-9000 CISC (300/400) and RISC (800/700), shared libs, includes CDE
IRIX From SGI. SVR3.2, much BSD. Version 5.x is based on SVR4.
Linux (i386/i486/i586/i686/ia64/alpha/sparc) Unix under GPL (not from FSF, though). Available with sources. POSIX compliant w/ SysV and BSD extensions. Being ported to Alpha/AXP and PowerPC (ports for 680x0 Amigas and Ataris already exist; a port is also being done to the MIPS/4000).
NetBSD 0.8 is actually 386bsd in a new suit. Ported to [34]86, MIPS, Amiga, Sun, Mac.
NeXTSTEP Intel Pentium and 86486, Hewlett-Packard PA-RISC, NeXT 68040, BSD4.3 over Mach kernel, own GUI.
OSF/1 DEC's port of OSF/1. Available on DEC' Alpha AXP (64-bit machine).
Plan 9 From AT&T. Announced 1992, complete rewrite, not clear how close to Unix it is. Key points: distributed, very small, various hardwares (Sun, Mips, Next, SGI, generic hobbit, 680x0, PCs), C (not C++ as rumors had it), new compiler, "8 1/2" window system (also very small), 16-bit Unicode, CPU/file servers over high speed nets.
SCO Unix 80x86. SVR3.2
Solaris From SUN. Available on Sparc, x86. With OpenWindows 3.0 (X11R4) and OpenLook, DeskSet, ONC, NIS. Both a.out (BSD) and elf (SVR4) formats. Kerberos support. Compilers unbundled! Solaris is OpenStep compliant.
SunOS From SUN. Available on 680x0, Sparc, i386, based on 4.3BSD, includes much from System V. Main Sun achievements: NFS, SunView, NeWS, OpenLook GUI standard, OpenWindows (NeWS, X11, SunView!).
Ultrix From DEC. Based on 4.2BSD with much of 4.3.
UnixWare SVR4.2