|--AT&T (1969)-----\
| |
| V6 (1976)
| |
| V7 (1979)
| |
| Novell owns AT&T's Unix (by 1994)
| _____________|________________
| | | | | |
| AIX IRIX SCO HP-UX Solaris 2.X
| (IBM) (SGI) (HP) (Sun)
|
|
|--Berkley (1977)-----\
| |
| 1BSD (1977)
UNIX-| |
| 4.4BSD (1993)
| |
| Net/2
| |
| 4.4BSD-Lite (by 1995)
| ________________|_____________________________
| | | | | | |
| SunOS Ultrix NetBSD OSF/1 NeXTSTEP Mac OS X
| (Sun) (DEC) (Various) (DEC) (NeXT) (Apple)
| (FreeBSD)
|
|
|--Hybrids----\
|
Linux (Various)
|
|____________________________________________
| | | | | |
| RedHat Debian Mandrake Slackware S.u.S.E.
| (Walnut Creek)
|
|_____________________________________________
| | | | |
MkLinux LinuxPPC TurboLinux OpenLinux CorelLinux
(Apple) (Caldera) (Corel)
Source: "Unix System Administration Handbook" | 
