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1The UNIX system family tree: Research and BSD
2---------------------------------------------
3
4First Edition (V1)
5 |
6Second Edition (V2)
7 |
8Third Edition (V3)

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49Tenth Edition | |
50 | 2.11BSD rev #430
51 4.3BSD NET/1 |
52 | v
53 4.3BSD Reno
54 |
55 *---------- 4.3BSD NET/2 -------------------+-------------*
56 | | | |
1The UNIX system family tree: Research and BSD
2---------------------------------------------
3
4First Edition (V1)
5 |
6Second Edition (V2)
7 |
8Third Edition (V3)

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49Tenth Edition | |
50 | 2.11BSD rev #430
51 4.3BSD NET/1 |
52 | v
53 4.3BSD Reno
54 |
55 *---------- 4.3BSD NET/2 -------------------+-------------*
56 | | | |
57386BSD 0.0 | | |
57386BSD 0.0 | | BSD/OS ALPHA
58 | | | |
58 | | | |
59386BSD 0.1 ------------>+ | BSDI 1.0
59386BSD 0.1 ------------>+ | BSD/OS 0.3.[13]
60 | \ | 4.4BSD Alpha |
60 | \ | 4.4BSD Alpha |
61 | 386BSD 1.0 | | |
61 | 386BSD 1.0 | | BSD/OS 0.9.[34]
62 | | 4.4BSD |
63 | | / | |
64 | | 4.4BSD-Encumbered | |
62 | | 4.4BSD |
63 | | / | |
64 | | 4.4BSD-Encumbered | |
65 | NetBSD 0.8 | |
65 | NetBSD 0.8 | BSD/OS 1.0
66 | | | |
66 | | | |
67FreeBSD 1.0 NetBSD 0.9 | |
68 | | .----- 4.4BSD Lite --> BSDI 2.0
69FreeBSD 1.1 | / / | |
70 | | / / | BSDI 2.0.1
71FreeBSD 1.1.5 .---|--------' / | |
72 | / | / 4.4BSD Lite2 -> BSDI 2.1
73FreeBSD 1.1.5.1 / | / / | | \ |
74 | / NetBSD 1.0 <-' / | | \ |
75 | / | / | | `-BSDI 3.0
76FreeBSD 2.0 <--' | FreeBSD 3.0 | | |
77 | \ NetBSD 1.3 | v
78FreeBSD 2.0.5 \ OpenBSD 2.3
79 | \
80 | \
81FreeBSD 2.1 |
82 | | NetBSD 1.1 ------.
83 | FreeBSD 2.1.5 | \
84 | | NetBSD 1.2 \
85 | FreeBSD 2.1.6 | \ OpenBSD 2.0
86 | | | \ |
87 | FreeBSD 2.1.6.1 | \ |
88 | | | \ |
89 | FreeBSD 2.1.7 | | |
90 | | | NetBSD 1.2.1 |
91 | FreeBSD 2.1.7.1 | |
92 | | |
93 | | |
94 *-FreeBSD 2.2 | |
95 | \ | |
96 | FreeBSD 2.2.1 | |
97 | | | |
98 | FreeBSD 2.2.2 | OpenBSD 2.1
99 | | | |
100 | FreeBSD 2.2.5 | |
101 | | | OpenBSD 2.2
102 | | NetBSD 1.3 |
103 | FreeBSD 2.2.6 | | |
104 | | | NetBSD 1.3.1 |
105 | | | | OpenBSD 2.3
106 | | | NetBSD 1.3.2 |
107 | FreeBSD 2.2.7 | | |
108 | | | | |
109 | v | | |
110 | FreeBSD 2.2.8 | | |
111 | | | |
112 | | | OpenBSD 2.4
113FreeBSD 3.0 | v |
114 | | NetBSD 1.3.3 |
115 *---FreeBSD 3.1 | |
116 | | | |
117 | FreeBSD 3.2 NetBSD 1.4 OpenBSD 2.5
118 | | | | |
119 | FreeBSD 3.3 | NetBSD 1.4.1 |
120 | | | | OpenBSD 2.6
121 | FreeBSD 3.4 | | |
67FreeBSD 1.0 NetBSD 0.9 | BSD/OS 1.1
68 | | .----- 4.4BSD Lite |
69FreeBSD 1.1 | / / | \ |
70 | | / / | \ |
71FreeBSD 1.1.5 .---|--------' / | \ |
72 | / | / | \ |
73FreeBSD 1.1.5.1 / | / | \ |
74 | / NetBSD 1.0 <-' | \ |
75 | / | | \ |
76FreeBSD 2.0 <--' | | BSD/OS 2.0
77 | \ | |
78FreeBSD 2.0.5 \ | BSD/OS 2.0.1
79 | \ .--- 4.4BSD Lite2 |
80 | \ | | | | |
81 | | FreeBSD 3.0 | | | |
82 | | NetBSD 1.3 | | |
83 | | OpenBSD 2.3 | |
84 | | BSD/OS 3.0 |
85FreeBSD 2.1 | |
86 | | NetBSD 1.1 ------. BSD/OS 2.1
87 | FreeBSD 2.1.5 | \ |
88 | | NetBSD 1.2 \ BSD/OS 3.0
89 | FreeBSD 2.1.6 | \ OpenBSD 2.0 |
90 | | | \ | |
91 | FreeBSD 2.1.6.1 | \ | |
92 | | | \ | |
93 | FreeBSD 2.1.7 | | | |
94 | | | NetBSD 1.2.1 | |
95 | FreeBSD 2.1.7.1 | | |
96 | | | |
97 | | | |
98 *-FreeBSD 2.2 | | |
99 | \ | | |
100 | FreeBSD 2.2.1 | | |
101 | | | | |
102 | FreeBSD 2.2.2 | OpenBSD 2.1 |
103 | | | | |
104 | FreeBSD 2.2.5 | | |
105 | | | OpenBSD 2.2 |
106 | | NetBSD 1.3 | |
107 | FreeBSD 2.2.6 | | | |
108 | | | NetBSD 1.3.1 | BSD/OS 3.1
109 | | | | OpenBSD 2.3 |
110 | | | NetBSD 1.3.2 | |
111 | FreeBSD 2.2.7 | | | |
112 | | | | | BSD/OS 4.0
113 | v | | | |
114 | FreeBSD 2.2.8 | | | |
115 | | | | |
116 | | | OpenBSD 2.4 |
117FreeBSD 3.0 | v | |
118 | | NetBSD 1.3.3 | |
119 *---FreeBSD 3.1 | | |
120 | | | | BSD/OS 4.0.1
121 | FreeBSD 3.2 NetBSD 1.4 OpenBSD 2.5 |
122 | | | | | |
123 | FreeBSD 3.3 | NetBSD 1.4.1 | |
124 | | | | OpenBSD 2.6 |
125 | FreeBSD 3.4 | | | |
126 | | | | | BSD/OS 4.1
127FreeBSD 4.0 | | NetBSD 1.4.2 | |
128 | | | | | v
122 | | | | |
129 | | | | |
123FreeBSD 4.0 | | NetBSD 1.4.2 |
124 | | | | |
125 | | | | |
126 | FreeBSD 3.5 | | OpenBSD 2.7
127 | | | | |
128 | FreeBSD 3.5.1 | | |
129 | | | |
130 *---FreeBSD 4.1 | | |
130 | FreeBSD 3.5 | | OpenBSD 2.7
131 | | | | |
132 | FreeBSD 3.5.1 | | |
133 | | | |
134 *---FreeBSD 4.1 | | |
131 | | | | |
135 | | | | |
132 | FreeBSD 4.1.1 | | |
136 | FreeBSD 4.1.1 | | |
133 | | | | |
137 | | | | |
134 | FreeBSD 4.2 | NetBSD 1.4.3 |
135 | | | OpenBSD 2.8
136 | v | |
137 | | |
138 | | |
139FreeBSD 5.0-current NetBSD -current OpenBSD -current
140 | | |
141 v v v

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161 Volume 11, Info 4, April, 1987.
162[KKK] Mike Karels, Kirk McKusick, and Keith Bostic. tahoe announcement.
163 comp.bugs.4bsd.ucb-fixes, June 15, 1988.
164[SMS] Steven M. Schultz. 2.11BSD, UNIX for the PDP-11.
165[FBD] FreeBSD Project, The.
166[NBD] NetBSD Project, The.
167[OBD] OpenBSD Project, The.
168[dmr] Dennis Ritchie, via E-Mail
138 | FreeBSD 4.2 | NetBSD 1.4.3 |
139 | | | OpenBSD 2.8
140 | v | |
141 | | |
142 | | |
143FreeBSD 5.0-current NetBSD -current OpenBSD -current
144 | | |
145 v v v

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165 Volume 11, Info 4, April, 1987.
166[KKK] Mike Karels, Kirk McKusick, and Keith Bostic. tahoe announcement.
167 comp.bugs.4bsd.ucb-fixes, June 15, 1988.
168[SMS] Steven M. Schultz. 2.11BSD, UNIX for the PDP-11.
169[FBD] FreeBSD Project, The.
170[NBD] NetBSD Project, The.
171[OBD] OpenBSD Project, The.
172[dmr] Dennis Ritchie, via E-Mail
173[BSDI] Berkeley Software Design, Inc.
169
174
170
171Multics 1965
172UNIX Summer 1969
173 DEC PDP-7
174First Edition 1971-11-03 [QCU]
175 DEC PDP-11/20, Assembler
176Second Edition 1972-06-12 [QCU]
177 10 UNIX installations
178Third Edition 1973-02-xx [QCU]

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185Sixth Edition 1975-05-xx [QCU]
186 port to DEC Vax
187Seventh Edition 1979-01-xx [QCU]
188 first portable UNIX
189Eighth Edition 1985-02-xx [QCU]
190 VAX 11/750, VAX 11/780 [dmr]
191 descended from 4.1c BSD [dmr]
192 descended from 4.1 BSD [44B]
175Multics 1965
176UNIX Summer 1969
177 DEC PDP-7
178First Edition 1971-11-03 [QCU]
179 DEC PDP-11/20, Assembler
180Second Edition 1972-06-12 [QCU]
181 10 UNIX installations
182Third Edition 1973-02-xx [QCU]

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189Sixth Edition 1975-05-xx [QCU]
190 port to DEC Vax
191Seventh Edition 1979-01-xx [QCU]
192 first portable UNIX
193Eighth Edition 1985-02-xx [QCU]
194 VAX 11/750, VAX 11/780 [dmr]
195 descended from 4.1c BSD [dmr]
196 descended from 4.1 BSD [44B]
193 scooping-out and replacement of the character-device
197 scooping-out and replacement of the character-device
194 and networking part by the streams mechanism
195
196Ninth Edition 1986-09-xx [QCU]
197Tenth Edition 1989-10-xx [QCU]
198
1991BSD late 1977
200 1978-03-09 [QCU]
201 PDP-11, Pascal, ex(1)

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229 beta release, IPC [44B]
2304.2BSD 1983-09-xx [QCU]
2314.3BSD 1986-06-xx [QCU]
232 1986-04-xx [KB]
2334.3BSD Tahoe 1988-06-xx [QCU]
2344.3BSD NET/1 1988-11-xx [QCU]
2354.3BSD Reno 1990-06-xx [QCU], [DOC]
2364.3BSD NET/2 1991-06-xx [QCU]
198 and networking part by the streams mechanism
199
200Ninth Edition 1986-09-xx [QCU]
201Tenth Edition 1989-10-xx [QCU]
202
2031BSD late 1977
204 1978-03-09 [QCU]
205 PDP-11, Pascal, ex(1)

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233 beta release, IPC [44B]
2344.2BSD 1983-09-xx [QCU]
2354.3BSD 1986-06-xx [QCU]
236 1986-04-xx [KB]
2374.3BSD Tahoe 1988-06-xx [QCU]
2384.3BSD NET/1 1988-11-xx [QCU]
2394.3BSD Reno 1990-06-xx [QCU], [DOC]
2404.3BSD NET/2 1991-06-xx [QCU]
241
242BSD/OS ALPHA 1991-12-xx [BSDI]
243 first code released to people outside BSDI
237386BSD 0.0 1992-02-xx [DOC]
244386BSD 0.0 1992-02-xx [DOC]
245BSD/OS 0.3.1 1992-04-xx [BSDI] first ext. beta; B customers
246BSD/OS 0.3.3 1992-06-xx [BSDI] first CDROM version
238386BSD 0.1 1992-07-28 [DOC]
2394.4BSD Alpha 1992-07-07
247386BSD 0.1 1992-07-28 [DOC]
2484.4BSD Alpha 1992-07-07
249BSD/OS 0.9.3 1992-10-xx [BSDI]
250 first external gamma; G customers
251BSD/OS 0.9.4 1992-12-xx [BSDI]
252 would have been 1.0 except for request
253 for preliminary injunction
254BSD/OS 1.0 1993-03-xx [BSDI]
255 injunction denied; first official release
240NetBSD 0.8 1993-04-20 [NBD]
2414.4BSD 1993-06-01 [USE]
242NetBSD 0.9 1993-08-23 [NBD]
243FreeBSD 1.0 1993-11-xx [FOO]
256NetBSD 0.8 1993-04-20 [NBD]
2574.4BSD 1993-06-01 [USE]
258NetBSD 0.9 1993-08-23 [NBD]
259FreeBSD 1.0 1993-11-xx [FOO]
260BSD/OS 1.1 1994-02-xx [BSDI]
2444.4BSD Lite 1994-03-01 [USE]
245FreeBSD 1.1 1994-04-xx [FBD]
246FreeBSD 1.1.5.1 1994-07-xx [FBD]
247 supersedes 1.1.5 3 days after release.
248NetBSD 1.0 1994-10-26 [NBD]
249386BSD 1.0 1994-11-12 [USE]
250FreeBSD 2.0 1995-01-xx [FBD]
2614.4BSD Lite 1994-03-01 [USE]
262FreeBSD 1.1 1994-04-xx [FBD]
263FreeBSD 1.1.5.1 1994-07-xx [FBD]
264 supersedes 1.1.5 3 days after release.
265NetBSD 1.0 1994-10-26 [NBD]
266386BSD 1.0 1994-11-12 [USE]
267FreeBSD 2.0 1995-01-xx [FBD]
268BSD/OS 2.0 1995-01-xx [BSDI] 4.4 lite based
251FreeBSD 2.0.5 1995-06-10 [FBD]
269FreeBSD 2.0.5 1995-06-10 [FBD]
270BSD/OS 2.0.1 1995-06-xx [BSDI]
2524.4BSD Lite Release 2 1995-06-xx [44B]
253 the true final distribution from the CSRG
254FreeBSD 2.1.0 1995-11-19 [FBD]
255NetBSD 1.1 1995-11-26 [NBD]
2714.4BSD Lite Release 2 1995-06-xx [44B]
272 the true final distribution from the CSRG
273FreeBSD 2.1.0 1995-11-19 [FBD]
274NetBSD 1.1 1995-11-26 [NBD]
275BSD/OS 2.1 1996-01-xx [BSDI]
256FreeBSD 2.1.5 1996-07-14 [FBD]
257NetBSD 1.2 1996-10-04 [NBD]
258OpenBSD 2.0 1996-10-18 [OBD]
259FreeBSD 2.1.6 1996-11-16 [FBD]
260FreeBSD 2.1.6.1 1996-11-25 [FBD] (sendmail security release)
261FreeBSD 2.1.7 1997-02-20 [FBD]
276FreeBSD 2.1.5 1996-07-14 [FBD]
277NetBSD 1.2 1996-10-04 [NBD]
278OpenBSD 2.0 1996-10-18 [OBD]
279FreeBSD 2.1.6 1996-11-16 [FBD]
280FreeBSD 2.1.6.1 1996-11-25 [FBD] (sendmail security release)
281FreeBSD 2.1.7 1997-02-20 [FBD]
282BSD/OS 3.0 1997-02-xx [BSDI] 4.4 lite2 based
262FreeBSD 2.2.0 1997-03-16 [FBD]
263FreeBSD 2.2.1 1997-03-25 [FBD]
264FreeBSD 2.2.2 1997-05-16 [FBD]
265NetBSD 1.2.1 1997-05-20 [NBD] (patch release)
266OpenBSD 2.1 1997-06-01 [OBD]
267FreeBSD 2.2.5 1997-10-22 [FBD]
268OpenBSD 2.2 1997-12-01 [OBD]
269NetBSD 1.3 1998-01-04 [NBD]
270FreeBSD 2.2.6 1998-03-25 [FBD]
271NetBSD 1.3.1 1998-03-09 [NBD] (patch release)
283FreeBSD 2.2.0 1997-03-16 [FBD]
284FreeBSD 2.2.1 1997-03-25 [FBD]
285FreeBSD 2.2.2 1997-05-16 [FBD]
286NetBSD 1.2.1 1997-05-20 [NBD] (patch release)
287OpenBSD 2.1 1997-06-01 [OBD]
288FreeBSD 2.2.5 1997-10-22 [FBD]
289OpenBSD 2.2 1997-12-01 [OBD]
290NetBSD 1.3 1998-01-04 [NBD]
291FreeBSD 2.2.6 1998-03-25 [FBD]
292NetBSD 1.3.1 1998-03-09 [NBD] (patch release)
293BSD/OS 3.1 1998-03-xx [BSDI]
272OpenBSD 2.3 1998-05-19 [OBD]
273NetBSD 1.3.2 1998-05-29 [NBD] (patch release)
274FreeBSD 2.2.7 1998-07-22 [FBD]
294OpenBSD 2.3 1998-05-19 [OBD]
295NetBSD 1.3.2 1998-05-29 [NBD] (patch release)
296FreeBSD 2.2.7 1998-07-22 [FBD]
297BSD/OS 4.0 1998-08-xx [BSDI]
298 2-lock MP support, ELF executables
275FreeBSD 3.0 1998-10-16 [FBD]
299FreeBSD 3.0 1998-10-16 [FBD]
276 FreeBSD-3.0 is a snapshot from -current,
277 while 3.1 and 3.2 are from 3.x-stable which
300 FreeBSD-3.0 is a snapshot from -current,
301 while 3.1 and 3.2 are from 3.x-stable which
278 was branched quite some time after 3.0-release
279FreeBSD 2.2.8 1998-11-29 [FBD]
280OpenBSD 2.4 1998-12-01 [OBD]
281NetBSD 1.3.3 1998-12-23 [NBD] (patch release)
282FreeBSD 3.1 1999-02-15 [FBD]
302 was branched quite some time after 3.0-release
303FreeBSD 2.2.8 1998-11-29 [FBD]
304OpenBSD 2.4 1998-12-01 [OBD]
305NetBSD 1.3.3 1998-12-23 [NBD] (patch release)
306FreeBSD 3.1 1999-02-15 [FBD]
307BSD/OS 4.0.1 1999-03-xx [BSDI]
283NetBSD 1.4 1999-05-12 [NBD]
284FreeBSD 3.2 1999-05-17 [FBD]
285OpenBSD 2.5 1999-05-19 [OBD]
286NetBSD 1.4.1 1999-08-26 [NBD] (patch release)
287FreeBSD 3.3 1999-09-17 [FBD]
288OpenBSD 2.6 1999-12-01 [OBD]
289FreeBSD 3.4 1999-12-20 [FBD]
308NetBSD 1.4 1999-05-12 [NBD]
309FreeBSD 3.2 1999-05-17 [FBD]
310OpenBSD 2.5 1999-05-19 [OBD]
311NetBSD 1.4.1 1999-08-26 [NBD] (patch release)
312FreeBSD 3.3 1999-09-17 [FBD]
313OpenBSD 2.6 1999-12-01 [OBD]
314FreeBSD 3.4 1999-12-20 [FBD]
315BSD/OS 4.1 1999-12-xx [BSDI]
290FreeBSD 4.0 2000-03-13 [FBD]
291NetBSD 1.4.2 2000-03-19 [NBD] (patch release)
292OpenBSD 2.7 2000-06-15 [OBD]
293FreeBSD 3.5 2000-06-24 [FBD]
294FreeBSD 4.1 2000-07-27 [FBD]
295FreeBSD 3.5.1 2000-07-28 [FBD]
296FreeBSD 4.1.1 2000-09-25 [FBD] (a network-only patch release)
297FreeBSD 4.2 2000-11-21 [FBD]

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344original BSD announcements from Usenet or tapes.
345
346Steven M. Schultz for providing 2.8BSD, 2.10BSD, 2.11BSD manual pages.
347
348--
349Copyright (c) 1997-2000 Wolfram Schneider <wosch@FreeBSD.ORG>
350URL: ftp://ftp.freebsd.org/pub/FreeBSD/branches/-current/src/share/misc/bsd-family-tree
351
316FreeBSD 4.0 2000-03-13 [FBD]
317NetBSD 1.4.2 2000-03-19 [NBD] (patch release)
318OpenBSD 2.7 2000-06-15 [OBD]
319FreeBSD 3.5 2000-06-24 [FBD]
320FreeBSD 4.1 2000-07-27 [FBD]
321FreeBSD 3.5.1 2000-07-28 [FBD]
322FreeBSD 4.1.1 2000-09-25 [FBD] (a network-only patch release)
323FreeBSD 4.2 2000-11-21 [FBD]

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370original BSD announcements from Usenet or tapes.
371
372Steven M. Schultz for providing 2.8BSD, 2.10BSD, 2.11BSD manual pages.
373
374--
375Copyright (c) 1997-2000 Wolfram Schneider <wosch@FreeBSD.ORG>
376URL: ftp://ftp.freebsd.org/pub/FreeBSD/branches/-current/src/share/misc/bsd-family-tree
377
352$FreeBSD: head/share/misc/bsd-family-tree 69278 2000-11-27 17:03:04Z asmodai $
378$FreeBSD: head/share/misc/bsd-family-tree 70110 2000-12-17 11:46:54Z wosch $
353
379