Major Unix and Unix-based Distributions

386BSD
Developer: N/A. Free off the internet and other sources
AIX
Developer: IBM
A/UX
Developer: Apple
BSD
Developer: University of California
BSD-lite
Developer: University of California
BSD/386
Developer: Berkeley software design
Coherent
Developer: Mark Williams Company
DC/OS
Developer: Pyramid Technology
Dynix
Developer: Sequent Computer Systems
FreeBSD
Developer: N/A. Free off the internet and other sources
HP-UX
Developer: Hewlett-Packard
Hurd (GNU)
Developer: Free Software Foundation
Interactive Unix
Developer: Sun Microsystems
Irix
Developer: Silicon Graphics
Linux
Developer: Linus Torvalds. Free off the internet and other sources
Mach
Developer: Carnegie Mellon University
Minix
Developer: Andrew Tannenbaum
MKS Toolkit
Developer: Mortice Kern Systems
NetBSD
Developer: N/A. Free off the internet and other sources
NeXTStep
Developer: NeXT
OSF/1
Developer: Digital Equipment Corporation (DEC)
SCO OpenServer
Developer: Santa Cruz Operation
SCO UNIX
Developer: Santa Cruz Operation
Solaris
Developer: Sun Microsystems
SunOS
Developer: Sun Microsystems
Ultrix
Developer: Digital Equipment Corporation (DEC)
Unicos
Developer: Cray research
UnixWare
Developer: Novell/Santa Cruz Operation