xref: /freebsd/share/misc/bsd-family-tree (revision 7aa383846770374466b1dcb2cefd71bde9acf463)
1The UNIX system family tree: Research and BSD
2---------------------------------------------
3
4First Edition (V1)
5     |
6Second Edition (V2)
7     |
8Third Edition (V3)
9     |
10Fourth Edition (V4)
11     |
12Fifth Edition (V5)
13     |
14Sixth Edition (V6) -----*
15       \                |
16        \               |
17         \              |
18Seventh Edition (V7)    |
19            \           |
20             \        1BSD
21             32V        |
22               \      2BSD---------------*
23                \    /                   |
24                 \  /                    |
25                  \/                     |
26                 3BSD                    |
27                  |                      |
28               4.0BSD                2.79BSD
29                  |                      |
30               4.1BSD --------------> 2.8BSD
31                  |                      |
32              4.1aBSD -----------\       |
33                  |                \     |
34              4.1bBSD                \   |
35                  |                    \ |
36      *------ 4.1cBSD --------------> 2.9BSD
37     /            |                      |
38Eighth Edition    |                   2.9BSD-Seismo
39     |            |                      |
40     +----<--- 4.2BSD               2.9.1BSD
41     |            |                      |
42     +----<--- 4.3BSD -------------> 2.10BSD
43     |            |               /      |
44Ninth Edition     |              / 2.10.1BSD
45     |         4.3BSD Tahoe-----+        |
46     |            |              \       |
47     |            |                \     |
48     v            |                  2.11BSD
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              |                      |           BSD/386 ALPHA
58   |                    |                      |             |
59386BSD 0.1 ------------>+                      |           BSD/386 0.3.[13]
60   |     \              |                  4.4BSD Alpha      |
61   |     386BSD 1.0     |                      |           BSD/386 0.9.[34]
62   |                    |                  4.4BSD            |
63   |                    |                    / |             |
64   |                    |   4.4BSD-Encumbered  |             |
65   |                 NetBSD 0.8                |           BSD/386 1.0
66   |                    |                      |             |
67FreeBSD 1.0          NetBSD 0.9                |           BSD/386 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   |                 | .-----|------Rhapsody |   |   |       |
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 |                   | |     |    |        OpenBSD 2.4       |
116FreeBSD 3.0 <--------* |     |    v            |             |
117 |                     |     | NetBSD 1.3.3    |             |
118 *---FreeBSD 3.1       |     |                 |             |
119 |       |             |     |                 |           BSD/OS 4.0.1
120 |   FreeBSD 3.2----*  |  NetBSD 1.4       OpenBSD 2.5       |
121 |       |          |  |  |  |    |            |             |
122 |       |          |  |  |  |    |            |             |
123 |       |          |  |  |  |    |            |             |
124 |   FreeBSD 3.3    |  |  |  | NetBSD 1.4.1    |             |
125 |       |          |  |  |  |    |        OpenBSD 2.6       |
126 |   FreeBSD 3.4    |  |  |  |    |            |             |
127 |           |      |  |  |  |    |            |           BSD/OS 4.1
128FreeBSD 4.0  |      |  |  |  | NetBSD 1.4.2    |             |
129 |           |      |  |  |  |    |            |             |
130 |           |      |  |  |  |    |            |             |
131 |   FreeBSD 3.5    |  |  |  |    |        OpenBSD 2.7       |
132 |           |      |  |  |  |    |            |             |
133 |   FreeBSD 3.5.1  |  |  |  |    |            |             |
134 |                  |  |  |  |    |            |             |
135 *---FreeBSD 4.1    |  |  |  |    |            |             |
136 |      |           |  | (?) |    |            |             |
137 |   FreeBSD 4.1.1  |  |  /  |    |            |             |
138 |      |           |  | /   |    |            |             |
139 |   FreeBSD 4.2   Darwin/   | NetBSD 1.4.3    |             |
140 |      |         Mac OS X   |             OpenBSD 2.8     BSD/OS 4.2
141 |      |             |      |                 |             |
142 |      |             |      |                 |             |
143 |      |           10.0  NetBSD 1.5           |             |
144 |   FreeBSD 4.3      |      |    |            |             |
145 |      |             |      |    |        OpenBSD 2.9       |
146 |      |             |      | NetBSD 1.5.1    |             |
147 |      |             |      |    |            |             |
148 |   FreeBSD 4.4-.    |      | NetBSD 1.5.2    |             |
149 |      |        | Mac OS X  |    |            |             |
150 |      |        |   10.1    |    |        OpenBSD 3.0       |
151 |   FreeBSD 4.5 |    |      |    |            |             |
152 |      |         \   |      |    |            |           BSD/OS 4.3
153 |   FreeBSD 4.6   \  |      |    |        OpenBSD 3.1       |
154 |      |           \ |      | NetBSD 1.5.3    |       	     |
155 |   FreeBSD 4.6.2 Mac OS X  |                 |             |
156 |      |            10.2    |                 |             |
157 |   FreeBSD 4.7      |      |                 |             |
158 |      |             |   NetBSD 1.6       OpenBSD 3.2       |
159 |   FreeBSD 4.8      |      |    |            |             |
160 |      |             |      | NetBSD 1.6.1    |             |
161 |      |--------.    |      |    |        OpenBSD 3.3     BSD/OS 5.0
162 |      |         \   |      |    |            |             |
163 |   FreeBSD 4.9   |  |      |    |        OpenBSD 3.4     BSD/OS 5.1 ISE
164 |      |          |  |      |    |            |
165 |      |          |  |      | NetBSD 1.6.2    |
166 |      |          |  |      |    |            |
167 |      |          |  |      |    |        OpenBSD 3.5
168 |      |          |  |      |    v            |
169 |   FreeBSD 4.10  |  |      |                 |
170 |      |          |  |      |                 |
171 |   FreeBSD 4.11  |  |      |                 |
172 |                 |  |      |                 |
173 |                  `-|------|-----------------|---------------------.
174 |                    |      |                 |                      \
175FreeBSD 5.0           |      |                 |                       |
176 |                    |      |                 |                       |
177FreeBSD 5.1           |      |                 |                 DragonFly 1.0
178 |          \         |      |                 |                       |
179 |           ----- Mac OS X  |                 |                       |
180 |                   10.3    |                 |                       |
181FreeBSD 5.2           |      |                 |                       |
182 |      |             |      |                 |                       |
183 |   FreeBSD 5.2.1    |      |                 |                       |
184 |                    |      |                 |                       |
185 *-------FreeBSD 5.3  |      |                 |                       |
186 |           |        |      |             OpenBSD 3.6                 |
187 |           |        |   NetBSD 2.0           |                       |
188 |           |        |      | |  |            |                DragonFly 1.2.0
189 |           |     Mac OS X  | | NetBSD 2.0.2  |                       |
190 |           |       10.4    | |  |            |                       |
191 |       FreeBSD 5.4  |      | |  |            |                       |
192 |           |        |      | |  |        OpenBSD 3.7                 |
193 |           |        |      | | NetBSD 2.0.3  |                       |
194 |           |        |      | |  |            |                       |
195 *--FreeBSD  |        |      | |  v        OpenBSD 3.8                 |
196 |    6.0    |        |      | |               |                       |
197 |     |     |        |      |  \              |                       |
198 |     |     |        |      | NetBSD 2.1      |                       |
199 |     |     |        |      |                 |                       |
200 |     |     |        |   NetBSD 3.0           |                       |
201 |     |     |        |      | |  |            |                DragonFly 1.4.0
202 |     |     |        |      | |  |        OpenBSD 3.9                 |
203 |  FreeBSD  |        |      | |  |            |                       |
204 |    6.1    |        |      | |  |            |                       |
205 |     |  FreeBSD 5.5 |      | |  |            |                       |
206 |     |              |      | | NetBSD 3.0.1  |                DragonFly 1.6.0
207 |     |              |      | |  |            |                       |
208 |     |              |      | |  |        OpenBSD 4.0                 |
209 |     |              |      | | NetBSD 3.0.2  |                       |
210 |     |              |      | NetBSD 3.1      |                       |
211 | FreeBSD 6.2        |      |                 |                       |
212 |     |              |      |                 |                DragonFly 1.8.0
213 |     |              |      |             OpenBSD 4.1                 |
214 |     |              |      |                 |                DragonFly 1.10.0
215 |     |           Mac OS X  |                 |                       |
216 |     |             10.5    |                 |                       |
217 |     |              |      |             OpenBSD 4.2                 |
218 |     |              |   NetBSD 4.0           |                       |
219 | FreeBSD 6.3        |      |                 |                       |
220 |            \       |      |                 |                       |
221 *--FreeBSD    |      |      |                 |                DragonFly 1.12.0
222 |    7.0      |      |      |                 |                       |
223 |     |       |      |      |             OpenBSD 4.3                 |
224 |     |       |      |      |                 |                DragonFly 2.0.0
225 |     |    FreeBSD   |      |             OpenBSD 4.4                 |
226 |     |      6.4     |      |                 |                       |
227 |     |              |      |                 |                       |
228 |  FreeBSD 7.1       |      |                 |                       |
229 |     |              |      |                 |                DragonFly 2.2.0
230 |  FreeBSD 7.2       |   NetBSD 5.0       OpenBSD 4.5                 |
231 |             \      |      |                 |                       |
232 |              |     |      |                 |                DragonFly 2.4.0
233 |              |     |      |             OpenBSD 4.6                 |
234 |              |     |      |                 |                       |
235 *--FreeBSD     |     |      |                 |                       |
236 |    8.0       |     |      |                 |                       |
237 |     |    FreeBSD   |      |                 |                       |
238 |     V      7.3     |      |                 |                DragonFly 2.6.0
239 |                    |      |             OpenBSD 4.7                 |
240 |                    |      |                 |                       |
241FreeBSD 9 -current    |  NetBSD -current  OpenBSD -current             |
242 |                    |      |                 |                       |
243 v                    v      v                 v                       v
244
245Time
246----------------
247
248Time tolerance +/- 6 months, depending on which book/article you read; if it
249was the announcement in Usenet or if it was available as tape.
250
251[44B] McKusick, Marshall Kirk, Keith Bostic, Michael J Karels,
252	and John Quarterman. The Design and Implementation of
253	the 4.4BSD Operating System.
254[APL] Apple website [http://www.apple.com/macosx/]
255[BSDI] Berkeley Software Design, Inc.
256[DFB] DragonFlyBSD Project, The.
257[DOC] README, COPYRIGHT on tape.
258[FBD] FreeBSD Project, The.
259[KB]  Keith Bostic. BSD2.10 available from Usenix. comp.unix.sources,
260	Volume 11, Info 4, April, 1987.
261[KKK] Mike Karels, Kirk McKusick, and Keith Bostic. tahoe announcement.
262	comp.bugs.4bsd.ucb-fixes, June 15, 1988.
263[KSJ] Michael J. Karels, Carl F. Smith, and William F. Jolitz.
264	Changes in the Kernel in 2.9BSD. Second Berkeley Software
265	Distribution UNIX Version 2.9, July, 1983.
266[NBD] NetBSD Project, The.
267[OBD] OpenBSD Project, The.
268[QCU] Salus, Peter H. A quarter century of UNIX.
269[SMS] Steven M. Schultz. 2.11BSD, UNIX for the PDP-11.
270[TUHS] The Unix Historical Society.  http://minnie.tuhs.org/Unix_History/.
271[USE] Usenet announcement.
272[WRS] Wind River Systems, Inc.
273[dmr] Dennis Ritchie, via E-Mail
274
275Multics                 1965
276UNIX                    Summer 1969
277				DEC PDP-7
278First   Edition         1971-11-03 [QCU]
279				DEC PDP-11/20, Assembler
280Second  Edition         1972-06-12 [QCU]
281				10 UNIX installations
282Third   Edition         1973-02-xx [QCU]
283				Pipes, 16 installations
284Fourth  Edition         1973-11-xx [QCU]
285				rewriting in C effected,
286                                above 30 installations
287Fifth   Edition         1974-06-xx [QCU]
288				above 50 installations
289Sixth   Edition         1975-05-xx [QCU]
290				port to DEC Vax
291Seventh Edition         1979-01-xx [QCU]
292				first portable UNIX
293Eighth  Edition         1985-02-xx [QCU]
294				VAX 11/750, VAX 11/780 [dmr]
295				descended from 4.1c BSD [dmr]
296				descended from 4.1 BSD [44B]
297			scooping-out and replacement of the character-device
298			and networking part by the streams mechanism
299
300Ninth   Edition         1986-09-xx [QCU]
301Tenth   Edition         1989-10-xx [QCU]
302
3031BSD                    late 1977
304			1978-03-09 [QCU]
305				PDP-11, Pascal, ex(1)
306				30 free copies of 1BSD sent out
307				35 tapes sold for 50 USD [QCU]
3082BSD                    mid 1978 [QCU] 1979-05-10 [TUHS]
309				75 2BSD tapes shipped
3102.79BSD			1980-04-xx [TUHS]
3112.8BSD			1981-07-xx [KSJ]
312
3132.8.1BSD		1982-01-xx [QCU]
314				set of performance improvements
3152.9BSD			1983-07-xx [KSJ]
3162.9.1BSD                1983-11-xx [TUHS]
3172.9BSD-Seismo		1985-08-xx [SMS]
3182.10BSD			1987-04-xx [KKK]
3192.10.1BSD		1989-01-xx [SMS]
3202.11BSD			1992-02-xx [SMS]
3212.11BSD rev #430	1999-12-13 [SMS]
322
32332V			1978-1[01]-xx [QCU]
3243BSD                    late 1979 [QCU] March 1980 [TUHS]
325				virtual memory, page replacement,
326                        	demand paging
3274.0BSD                  1980-10-xx
3284.1BSD                  1981-07-08 [DOC]
3294.1aBSD                 1982-04-xx
330				alpha release, 100 sites, networking [44B]
3314.1bBSD				internal release, fast filesystem [44B]
3324.1cBSD                 late 1982
333				beta release, IPC [44B]
3344.2BSD                  1983-09-xx [QCU]
335                        1983-08-03 [DOC]
3364.3BSD                  1986-06-xx [QCU]
337			1986-04-05 [KB], [DOC]
3384.3BSD Tahoe            1988-06-15 [QCU], [DOC]
3394.3BSD NET/1            1988-11-xx [QCU]
340                        1989-01-01 [DOC]
3414.3BSD Reno             1990-06-29 [QCU], [DOC]
3424.3BSD NET/2            1991-06-28 [QCU], [DOC]
343
344BSD/386 ALPHA		1991-12-xx [BSDI]
345				first code released to people outside BSDI
346386BSD 0.0              1992-02-xx [DOC]
347BSD/386 0.3.1	        1992-04-xx [BSDI] first ext. beta; B customers
348BSD/386 0.3.3		1992-06-xx [BSDI] first CDROM version
349386BSD 0.1              1992-07-28 [DOC]
3504.4BSD Alpha            1992-07-07
351BSD/386 0.9.3		1992-10-xx [BSDI]
352				first external gamma; G customers
353BSD/386 0.9.4		1992-12-xx [BSDI]
354				would have been 1.0 except for request
355				for preliminary injunction
356BSD/386 1.0 		1993-03-xx [BSDI]
357				injunction denied; first official release
358NetBSD 0.8              1993-04-20 [NBD]
3594.4BSD                  1993-06-01 [USE]
360NetBSD 0.9              1993-08-23 [NBD]
361FreeBSD 1.0		1993-11-01 [FBD]
362FreeBSD 1.0.2		1993-11-14 [FBD]
363				supersedes 1.0 13 days after release.
364BSD/386 1.1		1994-02-xx [BSDI]
3654.4BSD Lite             1994-03-01 [USE]
366FreeBSD 1.1		1994-05-07 [FBD]
367FreeBSD 1.1.5		1994-06-30 [FBD]
368FreeBSD 1.1.5.1		1994-07-05 [FBD]
369				supersedes 1.1.5 5 days after release.
370NetBSD 1.0              1994-10-26 [NBD]
371386BSD 1.0              1994-11-12 [USE]
372FreeBSD 2.0		1994-11-23 [FBD]
373BSD/OS 2.0		1995-01-xx [BSDI] 4.4 lite based
374FreeBSD 2.0.5		1995-06-10 [FBD]
375BSD/OS 2.0.1		1995-06-xx [BSDI]
3764.4BSD Lite Release 2	1995-06-xx [44B]
377				the true final distribution from the CSRG
378FreeBSD 2.1.0		1995-11-19 [FBD]
379NetBSD 1.1              1995-11-26 [NBD]
380BSD/OS 2.1		1996-01-xx [BSDI]
381FreeBSD 2.1.5		1996-07-14 [FBD]
382NetBSD 1.2              1996-10-04 [NBD]
383OpenBSD 2.0             1996-10-18 [OBD]
384FreeBSD 2.1.6		1996-11-16 [FBD]
385FreeBSD 2.1.6.1		1996-11-25 [FBD] (sendmail security release)
386Rhapsody		1997-xx-xx
387FreeBSD 2.1.7		1997-02-20 [FBD]
388BSD/OS 3.0		1997-02-xx [BSDI] 4.4 lite2 based
389FreeBSD 2.2.0		1997-03-16 [FBD]
390FreeBSD 2.2.1		1997-03-25 [FBD]
391FreeBSD 2.2.2		1997-05-16 [FBD]
392NetBSD 1.2.1            1997-05-20 [NBD] (patch release)
393OpenBSD 2.1             1997-06-01 [OBD]
394FreeBSD 2.2.5		1997-10-22 [FBD]
395OpenBSD 2.2             1997-12-01 [OBD]
396NetBSD 1.3              1998-01-04 [NBD]
397FreeBSD 2.2.6		1998-03-25 [FBD]
398NetBSD 1.3.1            1998-03-09 [NBD] (patch release)
399BSD/OS 3.1		1998-03-xx [BSDI]
400OpenBSD 2.3             1998-05-19 [OBD]
401NetBSD 1.3.2            1998-05-29 [NBD] (patch release)
402FreeBSD 2.2.7		1998-07-22 [FBD]
403BSD/OS 4.0		1998-08-xx [BSDI]
404				2-lock MP support, ELF executables
405FreeBSD 3.0		1998-10-16 [FBD]
406				FreeBSD-3.0 is a snapshot from -current,
407				while 3.1 and 3.2 are from 3.x-stable which
408				was branched quite some time after 3.0-release
409FreeBSD 2.2.8           1998-11-29 [FBD]
410OpenBSD 2.4             1998-12-01 [OBD]
411NetBSD 1.3.3            1998-12-23 [NBD] (patch release)
412FreeBSD 3.1		1999-02-15 [FBD]
413BSD/OS 4.0.1		1999-03-xx [BSDI]
414NetBSD 1.4              1999-05-12 [NBD]
415FreeBSD 3.2             1999-05-17 [FBD]
416OpenBSD 2.5             1999-05-19 [OBD]
417NetBSD 1.4.1            1999-08-26 [NBD] (patch release)
418FreeBSD 3.3             1999-09-17 [FBD]
419OpenBSD 2.6             1999-12-01 [OBD]
420FreeBSD 3.4             1999-12-20 [FBD]
421BSD/OS 4.1		1999-12-xx [BSDI]
422FreeBSD 4.0             2000-03-13 [FBD]
423NetBSD 1.4.2            2000-03-19 [NBD] (patch release)
424OpenBSD 2.7             2000-06-15 [OBD]
425FreeBSD 3.5		2000-06-24 [FBD]
426FreeBSD 4.1		2000-07-27 [FBD]
427FreeBSD 3.5.1		2000-07-28 [FBD]
428FreeBSD 4.1.1		2000-09-25 [FBD] (a network-only patch release)
429FreeBSD 4.2  		2000-11-21 [FBD]
430NetBSD 1.4.3		2000-11-25 [NBD] (patch release)
431BSD/OS 4.2		2000-11-29 [BSDI]
432OpenBSD 2.8		2000-12-01 [OBD]
433NetBSD 1.5              2000-12-06 [NBD]
434Mac OS X 10.0           2001-03-24 [APL]
435FreeBSD 4.3  		2001-04-20 [FBD]
436OpenBSD 2.9  		2001-06-01 [OBD]
437NetBSD 1.5.1		2001-07-11 [NBD] (patch release)
438NetBSD 1.5.2		2001-09-13 [NBD] (patch release)
439FreeBSD 4.4  		2001-09-18 [FBD]
440Mac OS X 10.1		2001-09-29 [APL]
441OpenBSD 3.0		2001-12-01 [OBD]
442FreeBSD 4.5  		2002-01-29 [FBD]
443BSD/OS 4.3		2002-03-14 [WRS]
444OpenBSD 3.1		2002-05-19 [OBD]
445FreeBSD 4.6  		2002-06-15 [FBD]
446NetBSD 1.5.3		2002-07-22 [NBD] (patch release)
447FreeBSD 4.6.2		2002-08-15 [FBD] (patch release)
448Mac OS X 10.2		2002-08-23 [APL]
449NetBSD 1.6		2002-09-14 [NBD]
450FreeBSD 4.7		2002-10-08 [FBD]
451OpenBSD 3.2		2002-11-01 [OBD]
452FreeBSD 5.0		2003-01-17 [FBD]
453				FreeBSD 5.0 is a separate branch off of
454				-current, similar to 3.0.
455FreeBSD 4.8		2003-04-03 [FBD]
456NetBSD 1.6.1		2003-04-21 [NBD] (patch release)
457OpenBSD 3.3		2003-05-01 [OBD]
458BSD/OS 5.0		2003-05-?? [WRS]
459FreeBSD 5.1		2003-06-09 [FBD]
460Mac OS X 10.3		2003-10-24 [APL]
461FreeBSD 4.9		2003-10-28 [FBD]
462BSD/OS 5.1 ISE		2003-10-?? [WRS] (final version)
463OpenBSD 3.4		2003-11-01 [OBD]
464FreeBSD 5.2		2004-01-12 [FBD]
465FreeBSD 5.2.1		2004-02-22 [FBD] (patch release)
466NetBSD 1.6.2		2004-03-01 [NBD] (patch release)
467OpenBSD 3.5		2004-04-01 [OBD]
468FreeBSD 4.10		2004-05-27 [FBD]
469DragonFly 1.0		2004-07-12 [DFB]
470OpenBSD 3.6		2004-10-29 [OBD]
471FreeBSD 5.3		2004-11-06 [FBD]
472NetBSD 2.0		2004-12-09 [NBD]
473FreeBSD 4.11		2005-01-25 [FBD]
474DragonFly 1.2.0		2005-04-08 [DFB]
475NetBSD 2.0.2		2005-04-14 [NBD] (security/critical release)
476Mac OS X 10.4		2005-04-29 [APL]
477FreeBSD 5.4		2005-05-09 [FBD]
478OpenBSD 3.7		2005-05-19 [OBD]
479NetBSD 2.0.3		2005-10-31 [NBD] (security/critical release)
480OpenBSD 3.8		2005-11-01 [OBD]
481FreeBSD 6.0		2005-11-01 [FBD]
482NetBSD 2.1		2005-11-02 [NBD]
483NetBSD 3.0		2005-12-23 [NBD]
484DragonFly 1.4.0		2006-01-08 [DFB]
485OpenBSD 3.9		2006-05-01 [OBD]
486FreeBSD 6.1		2006-05-08 [FBD]
487FreeBSD 5.5		2006-05-25 [FBD]
488NetBSD 3.0.1		2006-07-24 [NBD] (security/critical release)
489DragonFly 1.6.0		2006-07-24 [DFB]
490OpenBSD 4.0		2006-11-01 [OBD]
491NetBSD 3.0.2		2006-11-04 [NBD] (security/critical release)
492NetBSD 3.1		2006-11-04 [NBD]
493FreeBSD 6.2		2007-01-15 [FBD]
494DragonFly 1.8.0		2007-01-30 [DFB]
495OpenBSD 4.1		2007-05-01 [OBD]
496DragonFly 1.10.0	2007-08-06 [DFB]
497Mac OS X 10.5		2007-10-26 [APL]
498OpenBSD 4.2		2007-11-01 [OBD]
499NetBSD 4.0		2007-12-19 [NBD]
500FreeBSD 6.3		2008-01-18 [FBD]
501DragonFly 1.12.0	2008-02-26 [DFB]
502FreeBSD 7.0		2008-02-27 [FBD]
503OpenBSD 4.3		2008-05-01 [OBD]
504DragonFly 2.0.0		2008-07-21 [DFB]
505OpenBSD 4.4		2008-11-01 [OBD]
506FreeBSD 6.4		2008-11-28 [FBD]
507FreeBSD 7.1		2009-01-04 [FBD]
508DragonFly 2.2.0		2009-02-17 [DFB]
509NetBSD 5.0		2009-04-29 [NBD]
510OpenBSD 4.5		2009-05-01 [OBD]
511FreeBSD 7.2		2009-05-04 [FBD]
512DragonFly 2.4.0		2009-09-16 [DFB]
513OpenBSD 4.6		2009-10-18 [OBD]
514FreeBSD 8.0		2009-11-26 [FBD]
515FreeBSD 7.3		2010-03-23 [FBD]
516DragonFly 2.6.0		2010-03-28 [DFB]
517OpenBSD 4.7		2010-05-19 [OBD]
518
519Bibliography
520------------------------
521
522Leffler, Samuel J., Marshall Kirk McKusick, Michael J Karels and John
523Quarterman. The Design and Implementation of the 4.3BSD UNIX Operating
524System. Reading, Mass. Addison-Wesley, 1989. ISBN 0-201-06196-1
525
526Salus, Peter H. A quarter century of UNIX. Addison-Wesley Publishing
527Company, Inc., 1994. ISBN 0-201-54777-5
528
529McKusick, Marshall Kirk, Keith Bostic, Michael J Karels, and John
530Quarterman. The Design and Implementation of the 4.4BSD Operating
531System. Reading, Mass. Addison-Wesley, 1996. ISBN 0-201-54979-4
532
533McKusick, Marshall Kirk, George Neville-Neil. The Design and
534Implementation of the FreeBSD Operating System.
535Addison-Wesley Professional, Published: Aug 2, 2004. ISBN 0-201-70245-2
536
537Doug McIlroy. Research Unix Reader.
538
539Michael G. Brown. The Role of BSD in the Development of Unix.
540Presented to the Tasmanian Unix Special Interest Group of the
541Australian Computer Society, Hobart, August 1993.
542
543Peter H. Salus. Unix at 25. Byte Magazine, October 1994.
544URL: http://www.byte.com/art/9410/sec8/art3.htm
545
546Andreas Klemm, Lars K�ller. If you're going to San Francisco ...
547Die freien BSD-Varianten von Unix. c't April 1997, page 368ff.
548
549BSD Release Announcements collection.
550URL: http://www.FreeBSD.org/releases/
551
552BSD Hypertext Man Pages
553URL: http://www.FreeBSD.org/cgi/man.cgi
554
555UNIX history graphing project
556URL: http://minnie.tuhs.org/Unix_History/index.html
557
558UNIX history
559URL: http://www.levenez.com/unix/
560
561James Howard: The BSD Family Tree
562URL: http://ezine.daemonnews.org/200104/bsd_family.html
563("what are the differences between FreeBSD, NetBSD, and OpenBSD?")
564
565
566Acknowledgments
567---------------
568
569Josh Gilliam for suggestions, bug fixes, and finding very old
570original BSD announcements from Usenet or tapes.
571
572Steven M. Schultz for providing 2.8BSD, 2.10BSD, 2.11BSD manual pages.
573
574--
575Copyright (c) 1997-2007 Wolfram Schneider <wosch@FreeBSD.ORG>
576URL: http://cvsweb.freebsd.org/src/share/misc/bsd-family-tree
577
578$FreeBSD$
579