OPERATING SYSTEMS SCORECARD

386BSD
A/UX - Apple Corporation
AIX - International Business Machines (IBM)
ArchBSD - 4.4 BSD for Acorn RISC Platforms
AT&T System III
AT&T System V
BTOS
BSD/OS - Berkeley Software Design, Inc.
CLIX - Intergraph Corp.
Coherent
CTIX
Darwin
DC/OSx - Pyramid
DELPHI
DG/UX - Data General
Digital Unix (OSF1)(TRU64) - Digital Equiptment Corp. (DEC)
Domain/OS
DSR/NX
Dynix - IBM's enhanced enterprise class operating system.
ESIX - Esix Systems
FreeBSD - FreeBSD Organization
FreeBSD/Arm - 4.4 BSD for the Acorn RISC Platforms
HP-UX - Hewlett Packard (HP)
Harris' CX/UX
Helios
HEP-UPX
Hurd - GNU
IDRIS
Interactive Unix - Sun Microsystems
Irix - Silicon Graphics (SGI)
Linux
LynxOS - Lynx Real-Time System Inc.
MachTen - Tenon Intersystems
MacOS X
Minix
Motorola Unix R40
Motorola Unix V/88
MV/UX - Data General
NCR SVR4 MP-RAS - NCR Corporation
NetBSD
NeXT/OPENSTEP
NonStop-UX - Tandem
OpenBSD
OS/MP - (Solbournes - Operating System/Multi-Processing
POSIX
PTX (Sequent)
QNX - QNX Software Systems Ltd.
Reliant Unix - Fujitsu Siemens Computer
Riscos
RT - Encore (Real Time Unix)
SCO ODT - Santa Cruz Operation
SCO Open Server - Santa Cruz Operation
SCO XENIX - Santa Cruz Operation
SINIX - Siemens/Nixdorf
Solaris - Sun Microsystems
SPARC64/OS
SPP-UX - Convex
Stellar(?) (Stardent)
SunOS - Sun Microsystems
Topix - Sequoias Enterprise Systems
TRU64 (DUNIX) - Digital Equiptment Corp./Compaq
Ultrix - Digital Equiptment Corp. (DEC)
UMAX V R/T
UNICOS - Cray Research
UniSoft - One of the first widely-used commercial UNIX ports.
Unixware/Univel - Novell and Unix Systems Laboratories
USG
UTS - Amdahl Corporation
VENIX - VenturCom, Inc.
Version 5
Version 6
Version 7
Windows 95/NT
Xenix

BeOS Desktop OS optimized for video and sound
FreeBSD UNIX specifically for x86 platform, and a few others.
NetBSD UNIX for many different CPU platforms including x86.
NextStep Predecessor to OpenStep - No longer available. (Based in part on BSD 4.3)
OpenStep Purchased by Apple, but no longer available or supported.

SCO Open Server Caldera's Desktop and Server OS
Solaris Advanced UNIX for Servers and Desktops from Sun Microsystems.
UnixWare Caldera's Unix