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 |     FreeBSD 2.2.8 | |     |    |            |             |
114 |         |         | |     |    |            |             |
115 |         v         | |     |    |        OpenBSD 2.4       |
116 |     FreeBSD 2.2.9 | |     |    |            |             |
117 |                   | |     |    |            |             |
118FreeBSD 3.0 <--------* |     |    v            |             |
119 |                     |     | NetBSD 1.3.3    |             |
120 *---FreeBSD 3.1       |     |                 |             |
121 |       |             |     |                 |           BSD/OS 4.0.1
122 |   FreeBSD 3.2----*  |  NetBSD 1.4       OpenBSD 2.5       |
123 |       |          |  |  |  |    |            |             |
124 |       |          |  |  |  |    |            |             |
125 |       |          |  |  |  |    |            |             |
126 |   FreeBSD 3.3    |  |  |  | NetBSD 1.4.1    |             |
127 |       |          |  |  |  |    |        OpenBSD 2.6       |
128 |   FreeBSD 3.4    |  |  |  |    |            |             |
129 |           |      |  |  |  |    |            |           BSD/OS 4.1
130FreeBSD 4.0  |      |  |  |  | NetBSD 1.4.2    |             |
131 |           |      |  |  |  |    |            |             |
132 |           |      |  |  |  |    |            |             |
133 |   FreeBSD 3.5    |  |  |  |    |        OpenBSD 2.7       |
134 |           |      |  |  |  |    |            |             |
135 |   FreeBSD 3.5.1  |  |  |  |    |            |             |
136 |                  |  |  |  |    |            |             |
137 *---FreeBSD 4.1    |  |  |  |    |            |             |
138 |      |           |  | (?) |    |            |             |
139 |   FreeBSD 4.1.1  |  |  /  |    |            |             |
140 |      |           |  | /   |    |            |             |
141 |   FreeBSD 4.2   Darwin/   | NetBSD 1.4.3    |             |
142 |      |         Mac OS X   |             OpenBSD 2.8     BSD/OS 4.2
143 |      |             |      |                 |             |
144 |      |             |      |                 |             |
145 |      |           10.0  NetBSD 1.5           |             |
146 |   FreeBSD 4.3      |      |    |            |             |
147 |      |             |      |    |        OpenBSD 2.9       |
148 |      |             |      | NetBSD 1.5.1    |             |
149 |      |             |      |    |            |             |
150 |   FreeBSD 4.4-.    |      | NetBSD 1.5.2    |             |
151 |      |        | Mac OS X  |    |            |             |
152 |      |        |   10.1    |    |        OpenBSD 3.0       |
153 |   FreeBSD 4.5 |    |      |    |            |             |
154 |      |         \   |      |    |            |           BSD/OS 4.3
155 |   FreeBSD 4.6   \  |      |    |        OpenBSD 3.1       |
156 |      |           \ |      | NetBSD 1.5.3    |             |
157 |   FreeBSD 4.6.2 Mac OS X  |                 |             |
158 |      |            10.2    |                 |             |
159 |   FreeBSD 4.7      |      |                 |             |
160 |      |             |   NetBSD 1.6       OpenBSD 3.2       |
161 |   FreeBSD 4.8      |      |    |            |             |
162 |      |             |      | NetBSD 1.6.1    |             |
163 |      |--------.    |      |    |        OpenBSD 3.3     BSD/OS 5.0
164 |      |         \   |      |    |            |             |
165 |   FreeBSD 4.9   |  |      |    |        OpenBSD 3.4     BSD/OS 5.1 ISE
166 |      |          |  |      |    |            |
167 |      |          |  |      | NetBSD 1.6.2    |
168 |      |          |  |      |    |            |
169 |      |          |  |      |    |        OpenBSD 3.5
170 |      |          |  |      |    v            |
171 |   FreeBSD 4.10  |  |      |                 |
172 |      |          |  |      |                 |
173 |   FreeBSD 4.11  |  |      |                 |
174 |                 |  |      |                 |
175 |                  `-|------|-----------------|---------------------.
176 |                    |      |                 |                      \
177FreeBSD 5.0           |      |                 |                       |
178 |                    |      |                 |                       |
179FreeBSD 5.1           |      |                 |                 DragonFly 1.0
180 |          \         |      |                 |                       |
181 |           ----- Mac OS X  |                 |                       |
182 |                   10.3    |                 |                       |
183FreeBSD 5.2           |      |                 |                       |
184 |      |             |      |                 |                       |
185 |   FreeBSD 5.2.1    |      |                 |                       |
186 |                    |      |                 |                       |
187 *-------FreeBSD 5.3  |      |                 |                       |
188 |           |        |      |             OpenBSD 3.6                 |
189 |           |        |   NetBSD 2.0           |                       |
190 |           |        |      | |  |            |                DragonFly 1.2.0
191 |           |     Mac OS X  | | NetBSD 2.0.2  |                       |
192 |           |       10.4    | |  |            |                       |
193 |       FreeBSD 5.4  |      | |  |            |                       |
194 |           |        |      | |  |        OpenBSD 3.7                 |
195 |           |        |      | | NetBSD 2.0.3  |                       |
196 |           |        |      | |  |            |                       |
197 *--FreeBSD  |        |      | |  v        OpenBSD 3.8                 |
198 |    6.0    |        |      | |               |                       |
199 |     |     |        |      |  \              |                       |
200 |     |     |        |      | NetBSD 2.1      |                       |
201 |     |     |        |      |                 |                       |
202 |     |     |        |   NetBSD 3.0           |                       |
203 |     |     |        |      | |  |            |                DragonFly 1.4.0
204 |     |     |        |      | |  |        OpenBSD 3.9                 |
205 |  FreeBSD  |        |      | |  |            |                       |
206 |    6.1    |        |      | |  |            |                       |
207 |     |  FreeBSD 5.5 |      | |  |            |                       |
208 |     |              |      | | NetBSD 3.0.1  |                DragonFly 1.6.0
209 |     |              |      | |  |            |                       |
210 |     |              |      | |  |        OpenBSD 4.0                 |
211 |     |              |      | | NetBSD 3.0.2  |                       |
212 |     |              |      | NetBSD 3.1      |                       |
213 | FreeBSD 6.2        |      |                 |                       |
214 |     |              |      |                 |                DragonFly 1.8.0
215 |     |              |      |             OpenBSD 4.1                 |
216 |     |              |      |                 |                DragonFly 1.10.0
217 |     |           Mac OS X  |                 |                       |
218 |     |             10.5    |                 |                       |
219 |     |              |      |             OpenBSD 4.2                 |
220 |     |              |   NetBSD 4.0           |                       |
221 | FreeBSD 6.3        |      |    |            |                       |
222 |            \       |      |    |            |                       |
223 *--FreeBSD    |      |      |    |            |                DragonFly 1.12.0
224 |    7.0      |      |      |    |            |                       |
225 |     |       |      |      |    |        OpenBSD 4.3                 |
226 |     |       |      |      | NetBSD          |                DragonFly 2.0.0
227 |     |    FreeBSD   |      |  4.0.1      OpenBSD 4.4                 |
228 |     |      6.4     |      |                 |                       |
229 |     |              |      |                 |                       |
230 |  FreeBSD 7.1       |      |                 |                       |
231 |     |              |      |                 |                DragonFly 2.2.0
232 |  FreeBSD 7.2       |   NetBSD 5.0       OpenBSD 4.5                 |
233 |             \      |      | |    \          |                       |
234 |              |  Mac OS X  | |     \         |                       |
235 |              |    10.6    | |      \        |                       |
236 |              |     |      | |   NetBSD      |                DragonFly 2.4.0
237 |              |     |      | |    5.0.1  OpenBSD 4.6                 |
238 |              |     |      | |       |       |                       |
239 *--FreeBSD     |     |      | |       |       |                       |
240 |    8.0       |     |      | |       |       |                       |
241 |     |     FreeBSD  |      | |   NetBSD      |                       |
242 |     |       7.3    |      | |    5.0.2      |                DragonFly 2.6.0
243 |     |        |     |      | |           OpenBSD 4.7                 |
244 |  FreeBSD     |     |      | |               |                       |
245 |    8.1       |     |      | |               |                       |
246 |     |        |     |      | |               |                DragonFly 2.8.2
247 |     |        |     |      | |           OpenBSD 4.8                 |
248 |     |        |     |      | *--NetBSD       |                       |
249 |  FreeBSD  FreeBSD  |      | |    5.1        |                       |
250 |    8.2      7.4    |      | |      |        |               DragonFly 2.10.1
251 |     |              |      | |      |    OpenBSD 4.9                 |
252 |     `-----.     Mac OS X  | |      |        |                       |
253 |            \      10.7    | |      |        |                       |
254 |             |      |      | |      |    OpenBSD 5.0                 |
255 *--FreeBSD    |      |      | |      |        |                       |
256 |    9.0      |      |      | |   NetBSD      |               DragonFly 3.0.1
257 |     |    FreeBSD   |      | |    5.1.2      |                       |
258 |     |      8.3     |      | |      |        |                       |
259 |     |       |      |      | |   NetBSD      |                       |
260 |     |       |      |      | |    5.1.3      |                       |
261 |     |       |      |      | |           OpenBSD 5.1                 |
262 |     |       |   Mac OS X  | `----.          |                       |
263 |     |       |     10.8    |       \         |                       |
264 |     |       |      |   NetBSD 6.0  |        |                       |
265 |     |       |      |      | | |    |    OpenBSD 5.2         DragonFly 3.2.1
266 |  FreeBSD    |      |      | | | NetBSD      |                       |
267 |    9.1      |      |      | | |   5.2       |                       |
268 |     |       |      |      | | |    |        |                       |
269 |     |       |      |      | | | NetBSD      |                       |
270 |     |       |      |      | | |  5.2.1      |                       |
271 |     |       |      |      | | |             |                       |
272 |     |       |      |      | |  \            |                       |
273 |     |       |      |      | |   NetBSD      |                       |
274 |     |       |      |      | |    6.0.1      |                       |
275 |     |       |      |      | |      |        |                       |
276 |     |       |      |      | |   NetBSD      |                       |
277 |     |       |      |      | |    6.0.2      |                       |
278 |     |       |      |      | |      |   OpenBSD 5.3          DragonFly 3.4.1
279 |     |       |      |      | |   NetBSD      |                       |
280 |     |       |      |      | |    6.0.3      |                       |
281 |     |       |      |      | |      |        |                       |
282 |     |       |      |      | |   NetBSD      |                       |
283 |     |       |      |      | |    6.0.4      |                       |
284 |     |       |      |      | |      |        |                       |
285 |     |       |      |      | |   NetBSD      |                       |
286 |     |       |      |      | |    6.0.5      |                       |
287 |     |       |      |      | |               |                       |
288 |     |       |      |      | |`-NetBSD 6.1   |                       |
289 |     |    FreeBSD   |      |       |         |                       |
290 |     |      8.4     |      |    NetBSD 6.1.1 |                       |
291 |     |              |      |       |         |                       |
292 |  FreeBSD           |      |    NetBSD 6.1.2 |                       |
293 |    9.2          Mac OS X  |       |         |                       |
294 |     |             10.9    |       |    OpenBSD 5.4                  |
295 |     `-----.        |      |       |         |               DragonFly 3.6.0
296 |            \       |      |       |         |                       |
297 *--FreeBSD    |      |      |    NetBSD 6.1.3 |                       |
298 |   10.0      |      |      |       |         |                       |
299 |             |      |      |       |         |               DragonFly 3.6.1
300 |             |      |      |       |         |                       |
301 |             |      |      |       |         |                       |
302 |             |      |      |       |         |               DragonFly 3.6.2
303 |             |      |      |    NetBSD 6.1.4 |                       |
304 |             |      |      |                 |                       |
305 |             |      |      |            OpenBSD 5.5                  |
306 |             |      |      |                 |               DragonFly 3.8.0
307 |          FreeBSD   |      |                 |                       |
308 |            9.3     |      |                 |                       |
309 |                    |      |                 |                       |
310 |                    |      |                 |                       |
311 |                    |      |                 |                       |
312 |                    |      |                 |                       |
313 |                    |      |                 |                       |
314 |                    |      |                 |                       |
315 |                    |      |                 |                       |
316 |                    |      |                 |                       |
317FreeBSD 11 -current   |  NetBSD -current  OpenBSD -current     DragonFly -current
318 |                    |      |                 |                       |
319 v                    v      v                 v                       v
320
321Time
322----------------
323
324Time tolerance +/- 6 months, depending on which book/article you read; if it
325was the announcement in Usenet or if it was available as tape.
326
327[44B] McKusick, Marshall Kirk, Keith Bostic, Michael J Karels,
328	and John Quarterman. The Design and Implementation of
329	the 4.4BSD Operating System.
330[APL] Apple website [http://www.apple.com/macosx/]
331[BSDI] Berkeley Software Design, Inc.
332[DFB] DragonFlyBSD Project, The.
333[DOC] README, COPYRIGHT on tape.
334[FBD] FreeBSD Project, The.
335[KB]  Keith Bostic. BSD2.10 available from Usenix. comp.unix.sources,
336	Volume 11, Info 4, April, 1987.
337[KKK] Mike Karels, Kirk McKusick, and Keith Bostic. tahoe announcement.
338	comp.bugs.4bsd.ucb-fixes, June 15, 1988.
339[KSJ] Michael J. Karels, Carl F. Smith, and William F. Jolitz.
340	Changes in the Kernel in 2.9BSD. Second Berkeley Software
341	Distribution UNIX Version 2.9, July, 1983.
342[NBD] NetBSD Project, The.
343[OBD] OpenBSD Project, The.
344[QCU] Salus, Peter H. A quarter century of UNIX.
345[SMS] Steven M. Schultz. 2.11BSD, UNIX for the PDP-11.
346[TUHS] The Unix Historical Society.  http://minnie.tuhs.org/Unix_History/.
347[USE] Usenet announcement.
348[WRS] Wind River Systems, Inc.
349[dmr] Dennis Ritchie, via E-Mail
350
351Multics                 1965
352UNIX                    Summer 1969
353				DEC PDP-7
354First   Edition         1971-11-03 [QCU]
355				DEC PDP-11/20, Assembler
356Second  Edition         1972-06-12 [QCU]
357				10 UNIX installations
358Third   Edition         1973-02-xx [QCU]
359				Pipes, 16 installations
360Fourth  Edition         1973-11-xx [QCU]
361				rewriting in C effected,
362                                above 30 installations
363Fifth   Edition         1974-06-xx [QCU]
364				above 50 installations
365Sixth   Edition         1975-05-xx [QCU]
366				port to DEC Vax
367Seventh Edition         1979-01-xx [QCU]
368				first portable UNIX
369Eighth  Edition         1985-02-xx [QCU]
370				VAX 11/750, VAX 11/780 [dmr]
371				descended from 4.1c BSD [dmr]
372				descended from 4.1 BSD [44B]
373			scooping-out and replacement of the character-device
374			and networking part by the streams mechanism
375
376Ninth   Edition         1986-09-xx [QCU]
377Tenth   Edition         1989-10-xx [QCU]
378
3791BSD                    late 1977
380			1978-03-09 [QCU]
381				PDP-11, Pascal, ex(1)
382				30 free copies of 1BSD sent out
383				35 tapes sold for 50 USD [QCU]
3842BSD                    mid 1978 [QCU] 1979-05-10 [TUHS]
385				75 2BSD tapes shipped
3862.79BSD			1980-04-xx [TUHS]
3872.8BSD			1981-07-xx [KSJ]
388
3892.8.1BSD		1982-01-xx [QCU]
390				set of performance improvements
3912.9BSD			1983-07-xx [KSJ]
3922.9.1BSD                1983-11-xx [TUHS]
3932.9BSD-Seismo		1985-08-xx [SMS]
3942.10BSD			1987-04-xx [KKK]
3952.10.1BSD		1989-01-xx [SMS]
3962.11BSD			1992-02-xx [SMS]
3972.11BSD rev #430	1999-12-13 [SMS]
398
39932V			1978-1[01]-xx [QCU]
4003BSD                    late 1979 [QCU] March 1980 [TUHS]
401				virtual memory, page replacement,
402                        	demand paging
4034.0BSD                  1980-10-xx
4044.1BSD                  1981-07-08 [DOC]
4054.1aBSD                 1982-04-xx
406				alpha release, 100 sites, networking [44B]
4074.1bBSD				internal release, fast filesystem [44B]
4084.1cBSD                 late 1982
409				beta release, IPC [44B]
4104.2BSD                  1983-09-xx [QCU]
411                        1983-08-03 [DOC]
4124.3BSD                  1986-06-xx [QCU]
413			1986-04-05 [KB], [DOC]
4144.3BSD Tahoe            1988-06-15 [QCU], [DOC]
4154.3BSD NET/1            1988-11-xx [QCU]
416                        1989-01-01 [DOC]
4174.3BSD Reno             1990-06-29 [QCU], [DOC]
4184.3BSD NET/2            1991-06-28 [QCU], [DOC]
419
420BSD/386 ALPHA		1991-12-xx [BSDI]
421				first code released to people outside BSDI
422386BSD 0.0              1992-02-xx [DOC]
423BSD/386 0.3.1	        1992-04-xx [BSDI] first ext. beta; B customers
424BSD/386 0.3.3		1992-06-xx [BSDI] first CDROM version
425386BSD 0.1              1992-07-28 [DOC]
4264.4BSD Alpha            1992-07-07
427BSD/386 0.9.3		1992-10-xx [BSDI]
428				first external gamma; G customers
429BSD/386 0.9.4		1992-12-xx [BSDI]
430				would have been 1.0 except for request
431				for preliminary injunction
432BSD/386 1.0 		1993-03-xx [BSDI]
433				injunction denied; first official release
434NetBSD 0.8              1993-04-20 [NBD]
4354.4BSD                  1993-06-01 [USE]
436NetBSD 0.9              1993-08-23 [NBD]
437FreeBSD 1.0		1993-11-01 [FBD]
438FreeBSD 1.0.2		1993-11-14 [FBD]
439				supersedes 1.0 13 days after release.
440BSD/386 1.1		1994-02-xx [BSDI]
4414.4BSD Lite             1994-03-01 [USE]
442FreeBSD 1.1		1994-05-07 [FBD]
443FreeBSD 1.1.5		1994-06-30 [FBD]
444FreeBSD 1.1.5.1		1994-07-05 [FBD]
445				supersedes 1.1.5 5 days after release.
446NetBSD 1.0              1994-10-26 [NBD]
447386BSD 1.0              1994-11-12 [USE]
448FreeBSD 2.0		1994-11-23 [FBD]
449BSD/OS 2.0		1995-01-xx [BSDI] 4.4 lite based
450FreeBSD 2.0.5		1995-06-10 [FBD]
451BSD/OS 2.0.1		1995-06-xx [BSDI]
4524.4BSD Lite Release 2	1995-06-xx [44B]
453				the true final distribution from the CSRG
454FreeBSD 2.1.0		1995-11-19 [FBD]
455NetBSD 1.1              1995-11-26 [NBD]
456BSD/OS 2.1		1996-01-xx [BSDI]
457FreeBSD 2.1.5		1996-07-14 [FBD]
458NetBSD 1.2              1996-10-04 [NBD]
459OpenBSD 2.0             1996-10-18 [OBD]
460FreeBSD 2.1.6		1996-11-16 [FBD]
461FreeBSD 2.1.6.1		1996-11-25 [FBD] (sendmail security release)
462Rhapsody		1997-xx-xx
463FreeBSD 2.1.7		1997-02-20 [FBD]
464BSD/OS 3.0		1997-02-xx [BSDI] 4.4 lite2 based
465FreeBSD 2.2.0		1997-03-16 [FBD]
466FreeBSD 2.2.1		1997-03-25 [FBD]
467FreeBSD 2.2.2		1997-05-16 [FBD]
468NetBSD 1.2.1            1997-05-20 [NBD] (patch release)
469OpenBSD 2.1             1997-06-01 [OBD]
470FreeBSD 2.2.5		1997-10-22 [FBD]
471OpenBSD 2.2             1997-12-01 [OBD]
472NetBSD 1.3              1998-01-04 [NBD]
473FreeBSD 2.2.6		1998-03-25 [FBD]
474NetBSD 1.3.1            1998-03-09 [NBD] (patch release)
475BSD/OS 3.1		1998-03-xx [BSDI]
476OpenBSD 2.3             1998-05-19 [OBD]
477NetBSD 1.3.2            1998-05-29 [NBD] (patch release)
478FreeBSD 2.2.7		1998-07-22 [FBD]
479BSD/OS 4.0		1998-08-xx [BSDI]
480				2-lock MP support, ELF executables
481FreeBSD 3.0		1998-10-16 [FBD]
482				FreeBSD-3.0 is a snapshot from -current,
483				while 3.1 and 3.2 are from 3.x-stable which
484				was branched quite some time after 3.0-release
485FreeBSD 2.2.8           1998-11-29 [FBD]
486OpenBSD 2.4             1998-12-01 [OBD]
487NetBSD 1.3.3            1998-12-23 [NBD] (patch release)
488FreeBSD 3.1		1999-02-15 [FBD]
489BSD/OS 4.0.1		1999-03-xx [BSDI]
490NetBSD 1.4              1999-05-12 [NBD]
491FreeBSD 3.2             1999-05-17 [FBD]
492OpenBSD 2.5             1999-05-19 [OBD]
493NetBSD 1.4.1            1999-08-26 [NBD] (patch release)
494FreeBSD 3.3             1999-09-17 [FBD]
495OpenBSD 2.6             1999-12-01 [OBD]
496FreeBSD 3.4             1999-12-20 [FBD]
497BSD/OS 4.1		1999-12-xx [BSDI]
498FreeBSD 4.0             2000-03-13 [FBD]
499NetBSD 1.4.2            2000-03-19 [NBD] (patch release)
500OpenBSD 2.7             2000-06-15 [OBD]
501FreeBSD 3.5		2000-06-24 [FBD]
502FreeBSD 4.1		2000-07-27 [FBD]
503FreeBSD 3.5.1		2000-07-28 [FBD]
504FreeBSD 4.1.1		2000-09-25 [FBD] (a network-only patch release)
505FreeBSD 4.2  		2000-11-21 [FBD]
506NetBSD 1.4.3		2000-11-25 [NBD] (patch release)
507BSD/OS 4.2		2000-11-29 [BSDI]
508OpenBSD 2.8		2000-12-01 [OBD]
509NetBSD 1.5              2000-12-06 [NBD]
510Mac OS X 10.0           2001-03-24 [APL]
511FreeBSD 4.3  		2001-04-20 [FBD]
512OpenBSD 2.9  		2001-06-01 [OBD]
513NetBSD 1.5.1		2001-07-11 [NBD] (patch release)
514NetBSD 1.5.2		2001-09-13 [NBD] (patch release)
515FreeBSD 4.4  		2001-09-18 [FBD]
516Mac OS X 10.1		2001-09-29 [APL]
517OpenBSD 3.0		2001-12-01 [OBD]
518FreeBSD 4.5  		2002-01-29 [FBD]
519BSD/OS 4.3		2002-03-14 [WRS]
520OpenBSD 3.1		2002-05-19 [OBD]
521FreeBSD 4.6  		2002-06-15 [FBD]
522NetBSD 1.5.3		2002-07-22 [NBD] (patch release)
523FreeBSD 4.6.2		2002-08-15 [FBD] (patch release)
524Mac OS X 10.2		2002-08-23 [APL]
525NetBSD 1.6		2002-09-14 [NBD]
526FreeBSD 4.7		2002-10-08 [FBD]
527OpenBSD 3.2		2002-11-01 [OBD]
528FreeBSD 5.0		2003-01-17 [FBD]
529				FreeBSD 5.0 is a separate branch off of
530				-current, similar to 3.0.
531FreeBSD 4.8		2003-04-03 [FBD]
532NetBSD 1.6.1		2003-04-21 [NBD] (patch release)
533OpenBSD 3.3		2003-05-01 [OBD]
534BSD/OS 5.0		2003-05-?? [WRS]
535FreeBSD 5.1		2003-06-09 [FBD]
536Mac OS X 10.3		2003-10-24 [APL]
537FreeBSD 4.9		2003-10-28 [FBD]
538BSD/OS 5.1 ISE		2003-10-?? [WRS] (final version)
539OpenBSD 3.4		2003-11-01 [OBD]
540FreeBSD 5.2		2004-01-12 [FBD]
541FreeBSD 5.2.1		2004-02-22 [FBD] (patch release)
542NetBSD 1.6.2		2004-03-01 [NBD] (patch release)
543OpenBSD 3.5		2004-04-01 [OBD]
544FreeBSD 4.10		2004-05-27 [FBD]
545DragonFly 1.0		2004-07-12 [DFB]
546OpenBSD 3.6		2004-10-29 [OBD]
547FreeBSD 5.3		2004-11-06 [FBD]
548NetBSD 2.0		2004-12-09 [NBD]
549FreeBSD 4.11		2005-01-25 [FBD]
550DragonFly 1.2.0		2005-04-08 [DFB]
551NetBSD 2.0.2		2005-04-14 [NBD] (security/critical release)
552Mac OS X 10.4		2005-04-29 [APL]
553FreeBSD 5.4		2005-05-09 [FBD]
554OpenBSD 3.7		2005-05-19 [OBD]
555NetBSD 2.0.3		2005-10-31 [NBD] (security/critical release)
556OpenBSD 3.8		2005-11-01 [OBD]
557FreeBSD 6.0		2005-11-01 [FBD]
558NetBSD 2.1		2005-11-02 [NBD]
559NetBSD 3.0		2005-12-23 [NBD]
560DragonFly 1.4.0		2006-01-08 [DFB]
561FreeBSD 2.2.9		2006-04-01 [FBD]
562OpenBSD 3.9		2006-05-01 [OBD]
563FreeBSD 6.1		2006-05-08 [FBD]
564FreeBSD 5.5		2006-05-25 [FBD]
565NetBSD 3.0.1		2006-07-24 [NBD] (security/critical release)
566DragonFly 1.6.0		2006-07-24 [DFB]
567OpenBSD 4.0		2006-11-01 [OBD]
568NetBSD 3.0.2		2006-11-04 [NBD] (security/critical release)
569NetBSD 3.1		2006-11-04 [NBD]
570FreeBSD 6.2		2007-01-15 [FBD]
571DragonFly 1.8.0		2007-01-30 [DFB]
572OpenBSD 4.1		2007-05-01 [OBD]
573DragonFly 1.10.0	2007-08-06 [DFB]
574Mac OS X 10.5		2007-10-26 [APL]
575OpenBSD 4.2		2007-11-01 [OBD]
576NetBSD 4.0		2007-12-19 [NBD]
577FreeBSD 6.3		2008-01-18 [FBD]
578DragonFly 1.12.0	2008-02-26 [DFB]
579FreeBSD 7.0		2008-02-27 [FBD]
580OpenBSD 4.3		2008-05-01 [OBD]
581DragonFly 2.0.0		2008-07-21 [DFB]
582OpenBSD 4.4		2008-11-01 [OBD]
583FreeBSD 6.4		2008-11-28 [FBD]
584FreeBSD 7.1		2009-01-04 [FBD]
585DragonFly 2.2.0		2009-02-17 [DFB]
586NetBSD 5.0		2009-04-29 [NBD]
587OpenBSD 4.5		2009-05-01 [OBD]
588FreeBSD 7.2		2009-05-04 [FBD]
589Mac OS X 10.6		2009-06-08 [APL]
590NetBSD 5.0.1		2009-08-02 [NBD] (security/critical release)
591DragonFly 2.4.0		2009-09-16 [DFB]
592OpenBSD 4.6		2009-10-18 [OBD]
593FreeBSD 8.0		2009-11-26 [FBD]
594NetBSD 5.0.2		2010-02-12 [NBD] (security/critical release)
595FreeBSD 7.3		2010-03-23 [FBD]
596DragonFly 2.6.0		2010-03-28 [DFB]
597OpenBSD 4.7		2010-05-19 [OBD]
598FreeBSD 8.1		2010-07-24 [FBD]
599DragonFly 2.8.2		2010-10-30 [DFB]
600OpenBSD 4.8		2010-11-01 [OBD]
601NetBSD 5.1		2010-11-19 [NBD]
602FreeBSD 7.4		2011-02-24 [FBD]
603FreeBSD 8.2		2011-02-24 [FBD]
604DragonFly 2.10.1	2011-04-26 [DFB]
605OpenBSD 4.9		2011-05-01 [OBD]
606Mac OS X 10.7		2011-07-20 [APL]
607OpenBSD 5.0		2011-11-01 [OBD]
608FreeBSD 9.0		2012-01-12 [FBD]
609NetBSD 5.1.2		2012-02-02 [NBD] (security/critical release)
610DragonFly 3.0.1		2012-02-21 [DFB]
611FreeBSD 8.3		2012-04-18 [FBD]
612OpenBSD 5.1		2012-05-01 [OBD]
613Mac OS X 10.8		2012-07-25 [APL]
614NetBSD 6.0		2012-10-17 [NBD]
615OpenBSD 5.2		2012-11-01 [OBD]
616DragonFly 3.2.1		2012-11-02 [DFB]
617NetBSD 5.2		2012-12-03 [NBD]
618NetBSD 6.0.1		2012-12-26 [NBD] (security/critical release)
619FreeBSD 9.1		2012-12-30 [FBD]
620DragonFly 3.4.1		2013-04-29 [DFB]
621OpenBSD 5.3		2013-05-01 [OBD]
622NetBSD 6.0.2		2013-05-18 [NBD] (security/critical release)
623NetBSD 6.1		2013-05-18 [NBD]
624FreeBSD 8.4		2013-06-07 [FBD]
625NetBSD 6.1.1		2013-08-22 [NBD]
626NetBSD 5.1.3		2013-09-29 [NBD]
627NetBSD 5.2.1		2013-09-29 [NBD]
628FreeBSD 9.2		2013-09-30 [FBD]
629NetBSD 6.0.3		2013-09-30 [NBD]
630NetBSD 6.1.2		2013-09-30 [NBD]
631Mac OS X 10.9		2013-10-22 [APL]
632OpenBSD 5.4		2013-11-01 [OBD]
633DragonFly 3.6.0 	2013-11-25 [DFB]
634FreeBSD 10.0		2014-01-20 [FBD]
635NetBSD 6.0.4		2014-01-27 [NBD]
636NetBSD 6.1.3		2014-01-27 [NBD]
637DragonFly 3.6.1 	2014-02-22 [DFB]
638DragonFly 3.6.2		2014-04-10 [DFB]
639NetBSD 6.0.5		2014-04-19 [NDB]
640NetBSD 6.1.4		2014-04-19 [NDB]
641OpenBSD 5.5		2014-05-01 [OBD]
642DragonFly 3.8.0		2014-06-04 [DFB]
643FreeBSD 9.3		2014-07-05 [FBD]
644
645Bibliography
646------------------------
647
648Leffler, Samuel J., Marshall Kirk McKusick, Michael J Karels and John
649Quarterman. The Design and Implementation of the 4.3BSD UNIX Operating
650System. Reading, Mass. Addison-Wesley, 1989. ISBN 0-201-06196-1
651
652Salus, Peter H. A quarter century of UNIX. Addison-Wesley Publishing
653Company, Inc., 1994. ISBN 0-201-54777-5
654
655McKusick, Marshall Kirk, Keith Bostic, Michael J Karels, and John
656Quarterman. The Design and Implementation of the 4.4BSD Operating
657System. Reading, Mass. Addison-Wesley, 1996. ISBN 0-201-54979-4
658
659McKusick, Marshall Kirk, George Neville-Neil. The Design and
660Implementation of the FreeBSD Operating System.
661Addison-Wesley Professional, Published: Aug 2, 2004. ISBN 0-201-70245-2
662
663Doug McIlroy. Research Unix Reader.
664
665Michael G. Brown. The Role of BSD in the Development of Unix.
666Presented to the Tasmanian Unix Special Interest Group of the
667Australian Computer Society, Hobart, August 1993.
668
669Peter H. Salus. Unix at 25. Byte Magazine, October 1994.
670URL: http://www.byte.com/art/9410/sec8/art3.htm
671
672Andreas Klemm, Lars Köller. If you're going to San Francisco ...
673Die freien BSD-Varianten von Unix. c't April 1997, page 368ff.
674
675BSD Release Announcements collection.
676URL: http://www.FreeBSD.org/releases/
677
678BSD Hypertext Man Pages
679URL: http://www.FreeBSD.org/cgi/man.cgi
680
681UNIX history graphing project
682URL: http://minnie.tuhs.org/Unix_History/index.html
683
684UNIX history
685URL: http://www.levenez.com/unix/
686
687James Howard: The BSD Family Tree
688URL: http://ezine.daemonnews.org/200104/bsd_family.html
689("what are the differences between FreeBSD, NetBSD, and OpenBSD?")
690
691
692Acknowledgments
693---------------
694
695Josh Gilliam for suggestions, bug fixes, and finding very old
696original BSD announcements from Usenet or tapes.
697
698Steven M. Schultz for providing 2.8BSD, 2.10BSD, 2.11BSD manual pages.
699
700--
701Copyright (c) 1997-2012 Wolfram Schneider <wosch@FreeBSD.ORG>
702URL: http://svnweb.freebsd.org/base/head/share/misc/bsd-family-tree
703
704$FreeBSD$
705