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 |     |       |      |      |       |         |                       |
307 |     |       |      |      |       |         |               DragonFly 3.8.0
308 |     |       |      |      |       |         |                       |
309 |     |       |      |      |       |         |                       |
310 |     |       |      |      |       |         |               DragonFly 3.8.1
311 |     |       |      |      |       |         |                       |
312 |     |       |      |      |       |         |                       |
313 |     |       |      |      |       |         |               DragonFly 3.6.3
314 |     |       |      |      |       |         |                       |
315 |     |    FreeBSD   |      |       |         |                       |
316 |     |      9.3     |      |       |         |                       |
317 |     |              |      |    NetBSD 6.1.5 |               DragonFly 3.8.2
318 |     |           Mac OS X  |                 |                       |
319 |     |             10.10   |                 |                       |
320 |     |              |      |            OpenBSD 5.6                  |
321 |  FreeBSD           |      |                 |                       |
322 |   10.1             |      |                 |               DragonFly 4.0.1
323 |     |              |      |                 |                       |
324 |     |              |      |                 |               DragonFly 4.0.2
325 |     |              |      |                 |                       |
326 |     |              |      |                 |               DragonFly 4.0.3
327 |     |              |      |                 |                       |
328 |     |              |      |                 |               DragonFly 4.0.4
329 |     |              |      |                 |                       |
330 |     |              |      |                 |               DragonFly 4.0.5
331 |     |              |      |                 |                       |
332 |     |              |      |            OpenBSD 5.7                  |
333 |     |              |      |                 |               DragonFly 4.2.0
334 |  FreeBSD           |      |                 |                       |
335 |   10.2             |      |                 |                       |
336 |     |            OS X  NetBSD 7.0           |                       |
337 |     |            10.11    |            OpenBSD 5.8                  |
338 |     |              |      |                 |               DragonFly 4.4.1
339 |  FreeBSD           |      |            OpenBSD 5.9                  |
340 |   10.3             |      |                 |                       |
341 |                    |      |                 |               DragonFly 4.6.0
342 *--FreeBSD           |      |            OpenBSD 6.0                  |
343 |   11.0             |      |                 |                       |
344 |                    |      |                 |                       |
345 |                    |      |                 |                       |
346FreeBSD 12 -current   |  NetBSD -current  OpenBSD -current     DragonFly -current
347 |                    |      |                 |                       |
348 v                    v      v                 v                       v
349
350Time
351----------------
352
353Time tolerance +/- 6 months, depending on which book/article you read; if it
354was the announcement in Usenet or if it was available as tape.
355
356[44B] McKusick, Marshall Kirk, Keith Bostic, Michael J Karels,
357    and John Quarterman. The Design and Implementation of
358    the 4.4BSD Operating System.
359[APL] Apple website [http://www.apple.com/macosx/]
360[BSDI] Berkeley Software Design, Inc.
361[DFB] DragonFlyBSD Project, The.
362[DOC] README, COPYRIGHT on tape.
363[FBD] FreeBSD Project, The.
364[KB]  Keith Bostic. BSD2.10 available from Usenix. comp.unix.sources,
365    Volume 11, Info 4, April, 1987.
366[KKK] Mike Karels, Kirk McKusick, and Keith Bostic. tahoe announcement.
367    comp.bugs.4bsd.ucb-fixes, June 15, 1988.
368[KSJ] Michael J. Karels, Carl F. Smith, and William F. Jolitz.
369    Changes in the Kernel in 2.9BSD. Second Berkeley Software
370    Distribution UNIX Version 2.9, July, 1983.
371[NBD] NetBSD Project, The.
372[OBD] OpenBSD Project, The.
373[QCU] Salus, Peter H. A quarter century of UNIX.
374[SMS] Steven M. Schultz. 2.11BSD, UNIX for the PDP-11.
375[TUHS] The Unix Historical Society.  http://minnie.tuhs.org/Unix_History/.
376[USE] Usenet announcement.
377[WRS] Wind River Systems, Inc.
378[dmr] Dennis Ritchie, via E-Mail
379
380Multics                 1965
381UNIX                    Summer 1969
382                DEC PDP-7
383First   Edition         1971-11-03 [QCU]
384                DEC PDP-11/20, Assembler
385Second  Edition         1972-06-12 [QCU]
386                10 UNIX installations
387Third   Edition         1973-02-xx [QCU]
388                Pipes, 16 installations
389Fourth  Edition         1973-11-xx [QCU]
390                rewriting in C effected,
391                                above 30 installations
392Fifth   Edition         1974-06-xx [QCU]
393                above 50 installations
394Sixth   Edition         1975-05-xx [QCU]
395                port to DEC Vax
396Seventh Edition         1979-01-xx [QCU]
397                first portable UNIX
398Eighth  Edition         1985-02-xx [QCU]
399                VAX 11/750, VAX 11/780 [dmr]
400                descended from 4.1c BSD [dmr]
401                descended from 4.1 BSD [44B]
402            scooping-out and replacement of the character-device
403            and networking part by the streams mechanism
404
405Ninth   Edition         1986-09-xx [QCU]
406Tenth   Edition         1989-10-xx [QCU]
407
4081BSD                    late 1977
409            1978-03-09 [QCU]
410                PDP-11, Pascal, ex(1)
411                30 free copies of 1BSD sent out
412                35 tapes sold for 50 USD [QCU]
4132BSD                    mid 1978 [QCU] 1979-05-10 [TUHS]
414                75 2BSD tapes shipped
4152.79BSD         1980-04-xx [TUHS]
4162.8BSD          1981-07-xx [KSJ]
417
4182.8.1BSD        1982-01-xx [QCU]
419                set of performance improvements
4202.9BSD          1983-07-xx [KSJ]
4212.9.1BSD                1983-11-xx [TUHS]
4222.9BSD-Seismo       1985-08-xx [SMS]
4232.10BSD         1987-04-xx [KKK]
4242.10.1BSD       1989-01-xx [SMS]
4252.11BSD         1992-02-xx [SMS]
4262.11BSD rev #430    1999-12-13 [SMS]
427
42832V         1978-1[01]-xx [QCU]
4293BSD                    late 1979 [QCU] March 1980 [TUHS]
430                virtual memory, page replacement,
431                            demand paging
4324.0BSD                  1980-10-xx
4334.1BSD                  1981-07-08 [DOC]
4344.1aBSD                 1982-04-xx
435                alpha release, 100 sites, networking [44B]
4364.1bBSD             internal release, fast filesystem [44B]
4374.1cBSD                 late 1982
438                beta release, IPC [44B]
4394.2BSD                  1983-09-xx [QCU]
440                        1983-08-03 [DOC]
4414.3BSD                  1986-06-xx [QCU]
442            1986-04-05 [KB], [DOC]
4434.3BSD Tahoe            1988-06-15 [QCU], [DOC]
4444.3BSD NET/1            1988-11-xx [QCU]
445                        1989-01-01 [DOC]
4464.3BSD Reno             1990-06-29 [QCU], [DOC]
4474.3BSD NET/2            1991-06-28 [QCU], [DOC]
448
449BSD/386 ALPHA       1991-12-xx [BSDI]
450                first code released to people outside BSDI
451386BSD 0.0              1992-02-xx [DOC]
452BSD/386 0.3.1           1992-04-xx [BSDI] first ext. beta; B customers
453BSD/386 0.3.3       1992-06-xx [BSDI] first CDROM version
454386BSD 0.1              1992-07-28 [DOC]
4554.4BSD Alpha            1992-07-07
456BSD/386 0.9.3       1992-10-xx [BSDI]
457                first external gamma; G customers
458BSD/386 0.9.4       1992-12-xx [BSDI]
459                would have been 1.0 except for request
460                for preliminary injunction
461BSD/386 1.0         1993-03-xx [BSDI]
462                injunction denied; first official release
463NetBSD 0.8              1993-04-20 [NBD]
4644.4BSD                  1993-06-01 [USE]
465NetBSD 0.9              1993-08-23 [NBD]
466FreeBSD 1.0     1993-11-01 [FBD]
467FreeBSD 1.0.2       1993-11-14 [FBD]
468                supersedes 1.0 13 days after release.
469BSD/386 1.1     1994-02-xx [BSDI]
4704.4BSD Lite             1994-03-01 [USE]
471FreeBSD 1.1     1994-05-07 [FBD]
472FreeBSD 1.1.5       1994-06-30 [FBD]
473FreeBSD 1.1.5.1     1994-07-05 [FBD]
474                supersedes 1.1.5 5 days after release.
475NetBSD 1.0              1994-10-26 [NBD]
476386BSD 1.0              1994-11-12 [USE]
477FreeBSD 2.0     1994-11-23 [FBD]
478BSD/OS 2.0      1995-01-xx [BSDI] 4.4 lite based
479FreeBSD 2.0.5       1995-06-10 [FBD]
480BSD/OS 2.0.1        1995-06-xx [BSDI]
4814.4BSD Lite Release 2   1995-06-xx [44B]
482                the true final distribution from the CSRG
483FreeBSD 2.1.0       1995-11-19 [FBD]
484NetBSD 1.1              1995-11-26 [NBD]
485BSD/OS 2.1      1996-01-xx [BSDI]
486FreeBSD 2.1.5       1996-07-14 [FBD]
487NetBSD 1.2              1996-10-04 [NBD]
488OpenBSD 2.0             1996-10-18 [OBD]
489FreeBSD 2.1.6       1996-11-16 [FBD]
490FreeBSD 2.1.6.1     1996-11-25 [FBD] (sendmail security release)
491Rhapsody        1997-xx-xx
492FreeBSD 2.1.7       1997-02-20 [FBD]
493BSD/OS 3.0      1997-02-xx [BSDI] 4.4 lite2 based
494FreeBSD 2.2.0       1997-03-16 [FBD]
495FreeBSD 2.2.1       1997-03-25 [FBD]
496FreeBSD 2.2.2       1997-05-16 [FBD]
497NetBSD 1.2.1            1997-05-20 [NBD] (patch release)
498OpenBSD 2.1             1997-06-01 [OBD]
499FreeBSD 2.2.5       1997-10-22 [FBD]
500OpenBSD 2.2             1997-12-01 [OBD]
501NetBSD 1.3              1998-01-04 [NBD]
502FreeBSD 2.2.6       1998-03-25 [FBD]
503NetBSD 1.3.1            1998-03-09 [NBD] (patch release)
504BSD/OS 3.1      1998-03-xx [BSDI]
505OpenBSD 2.3             1998-05-19 [OBD]
506NetBSD 1.3.2            1998-05-29 [NBD] (patch release)
507FreeBSD 2.2.7       1998-07-22 [FBD]
508BSD/OS 4.0      1998-08-xx [BSDI]
509                2-lock MP support, ELF executables
510FreeBSD 3.0     1998-10-16 [FBD]
511                FreeBSD-3.0 is a snapshot from -current,
512                while 3.1 and 3.2 are from 3.x-stable which
513                was branched quite some time after 3.0-release
514FreeBSD 2.2.8           1998-11-29 [FBD]
515OpenBSD 2.4             1998-12-01 [OBD]
516NetBSD 1.3.3            1998-12-23 [NBD] (patch release)
517FreeBSD 3.1     1999-02-15 [FBD]
518BSD/OS 4.0.1        1999-03-xx [BSDI]
519NetBSD 1.4              1999-05-12 [NBD]
520FreeBSD 3.2             1999-05-17 [FBD]
521OpenBSD 2.5             1999-05-19 [OBD]
522NetBSD 1.4.1            1999-08-26 [NBD] (patch release)
523FreeBSD 3.3             1999-09-17 [FBD]
524OpenBSD 2.6             1999-12-01 [OBD]
525FreeBSD 3.4             1999-12-20 [FBD]
526BSD/OS 4.1      1999-12-xx [BSDI]
527FreeBSD 4.0             2000-03-13 [FBD]
528NetBSD 1.4.2            2000-03-19 [NBD] (patch release)
529OpenBSD 2.7             2000-06-15 [OBD]
530FreeBSD 3.5     2000-06-24 [FBD]
531FreeBSD 4.1     2000-07-27 [FBD]
532FreeBSD 3.5.1       2000-07-28 [FBD]
533FreeBSD 4.1.1       2000-09-25 [FBD] (a network-only patch release)
534FreeBSD 4.2         2000-11-21 [FBD]
535NetBSD 1.4.3        2000-11-25 [NBD] (patch release)
536BSD/OS 4.2      2000-11-29 [BSDI]
537OpenBSD 2.8     2000-12-01 [OBD]
538NetBSD 1.5              2000-12-06 [NBD]
539Mac OS X 10.0           2001-03-24 [APL]
540FreeBSD 4.3         2001-04-20 [FBD]
541OpenBSD 2.9         2001-06-01 [OBD]
542NetBSD 1.5.1        2001-07-11 [NBD] (patch release)
543NetBSD 1.5.2        2001-09-13 [NBD] (patch release)
544FreeBSD 4.4         2001-09-18 [FBD]
545Mac OS X 10.1       2001-09-29 [APL]
546OpenBSD 3.0     2001-12-01 [OBD]
547FreeBSD 4.5         2002-01-29 [FBD]
548BSD/OS 4.3      2002-03-14 [WRS]
549OpenBSD 3.1     2002-05-19 [OBD]
550FreeBSD 4.6         2002-06-15 [FBD]
551NetBSD 1.5.3        2002-07-22 [NBD] (patch release)
552FreeBSD 4.6.2       2002-08-15 [FBD] (patch release)
553Mac OS X 10.2       2002-08-23 [APL]
554NetBSD 1.6      2002-09-14 [NBD]
555FreeBSD 4.7     2002-10-08 [FBD]
556OpenBSD 3.2     2002-11-01 [OBD]
557FreeBSD 5.0     2003-01-17 [FBD]
558                FreeBSD 5.0 is a separate branch off of
559                -current, similar to 3.0.
560FreeBSD 4.8     2003-04-03 [FBD]
561NetBSD 1.6.1        2003-04-21 [NBD] (patch release)
562OpenBSD 3.3     2003-05-01 [OBD]
563BSD/OS 5.0      2003-05-?? [WRS]
564FreeBSD 5.1     2003-06-09 [FBD]
565Mac OS X 10.3       2003-10-24 [APL]
566FreeBSD 4.9     2003-10-28 [FBD]
567BSD/OS 5.1 ISE      2003-10-?? [WRS] (final version)
568OpenBSD 3.4     2003-11-01 [OBD]
569FreeBSD 5.2     2004-01-12 [FBD]
570FreeBSD 5.2.1       2004-02-22 [FBD] (patch release)
571NetBSD 1.6.2        2004-03-01 [NBD] (patch release)
572OpenBSD 3.5     2004-04-01 [OBD]
573FreeBSD 4.10        2004-05-27 [FBD]
574DragonFly 1.0       2004-07-12 [DFB]
575OpenBSD 3.6     2004-10-29 [OBD]
576FreeBSD 5.3     2004-11-06 [FBD]
577NetBSD 2.0      2004-12-09 [NBD]
578FreeBSD 4.11        2005-01-25 [FBD]
579DragonFly 1.2.0     2005-04-08 [DFB]
580NetBSD 2.0.2        2005-04-14 [NBD] (security/critical release)
581Mac OS X 10.4       2005-04-29 [APL]
582FreeBSD 5.4     2005-05-09 [FBD]
583OpenBSD 3.7     2005-05-19 [OBD]
584NetBSD 2.0.3        2005-10-31 [NBD] (security/critical release)
585OpenBSD 3.8     2005-11-01 [OBD]
586FreeBSD 6.0     2005-11-01 [FBD]
587NetBSD 2.1      2005-11-02 [NBD]
588NetBSD 3.0      2005-12-23 [NBD]
589DragonFly 1.4.0     2006-01-08 [DFB]
590FreeBSD 2.2.9       2006-04-01 [FBD]
591OpenBSD 3.9     2006-05-01 [OBD]
592FreeBSD 6.1     2006-05-08 [FBD]
593FreeBSD 5.5     2006-05-25 [FBD]
594NetBSD 3.0.1        2006-07-24 [NBD] (security/critical release)
595DragonFly 1.6.0     2006-07-24 [DFB]
596OpenBSD 4.0     2006-11-01 [OBD]
597NetBSD 3.0.2        2006-11-04 [NBD] (security/critical release)
598NetBSD 3.1      2006-11-04 [NBD]
599FreeBSD 6.2     2007-01-15 [FBD]
600DragonFly 1.8.0     2007-01-30 [DFB]
601OpenBSD 4.1     2007-05-01 [OBD]
602DragonFly 1.10.0    2007-08-06 [DFB]
603Mac OS X 10.5       2007-10-26 [APL]
604OpenBSD 4.2     2007-11-01 [OBD]
605NetBSD 4.0      2007-12-19 [NBD]
606FreeBSD 6.3     2008-01-18 [FBD]
607DragonFly 1.12.0    2008-02-26 [DFB]
608FreeBSD 7.0     2008-02-27 [FBD]
609OpenBSD 4.3     2008-05-01 [OBD]
610DragonFly 2.0.0     2008-07-21 [DFB]
611OpenBSD 4.4     2008-11-01 [OBD]
612FreeBSD 6.4     2008-11-28 [FBD]
613FreeBSD 7.1     2009-01-04 [FBD]
614DragonFly 2.2.0     2009-02-17 [DFB]
615NetBSD 5.0      2009-04-29 [NBD]
616OpenBSD 4.5     2009-05-01 [OBD]
617FreeBSD 7.2     2009-05-04 [FBD]
618Mac OS X 10.6       2009-06-08 [APL]
619NetBSD 5.0.1        2009-08-02 [NBD] (security/critical release)
620DragonFly 2.4.0     2009-09-16 [DFB]
621OpenBSD 4.6     2009-10-18 [OBD]
622FreeBSD 8.0     2009-11-26 [FBD]
623NetBSD 5.0.2        2010-02-12 [NBD] (security/critical release)
624FreeBSD 7.3     2010-03-23 [FBD]
625DragonFly 2.6.0     2010-03-28 [DFB]
626OpenBSD 4.7     2010-05-19 [OBD]
627FreeBSD 8.1     2010-07-24 [FBD]
628DragonFly 2.8.2     2010-10-30 [DFB]
629OpenBSD 4.8     2010-11-01 [OBD]
630NetBSD 5.1      2010-11-19 [NBD]
631FreeBSD 7.4     2011-02-24 [FBD]
632FreeBSD 8.2     2011-02-24 [FBD]
633DragonFly 2.10.1    2011-04-26 [DFB]
634OpenBSD 4.9     2011-05-01 [OBD]
635Mac OS X 10.7       2011-07-20 [APL]
636OpenBSD 5.0     2011-11-01 [OBD]
637FreeBSD 9.0     2012-01-12 [FBD]
638NetBSD 5.1.2        2012-02-02 [NBD] (security/critical release)
639DragonFly 3.0.1     2012-02-21 [DFB]
640FreeBSD 8.3     2012-04-18 [FBD]
641OpenBSD 5.1     2012-05-01 [OBD]
642Mac OS X 10.8       2012-07-25 [APL]
643NetBSD 6.0      2012-10-17 [NBD]
644OpenBSD 5.2     2012-11-01 [OBD]
645DragonFly 3.2.1     2012-11-02 [DFB]
646NetBSD 5.2      2012-12-03 [NBD]
647NetBSD 6.0.1        2012-12-26 [NBD] (security/critical release)
648FreeBSD 9.1     2012-12-30 [FBD]
649DragonFly 3.4.1     2013-04-29 [DFB]
650OpenBSD 5.3     2013-05-01 [OBD]
651NetBSD 6.0.2        2013-05-18 [NBD] (security/critical release)
652NetBSD 6.1      2013-05-18 [NBD]
653FreeBSD 8.4     2013-06-07 [FBD]
654NetBSD 6.1.1        2013-08-22 [NBD]
655NetBSD 5.1.3        2013-09-29 [NBD]
656NetBSD 5.2.1        2013-09-29 [NBD]
657FreeBSD 9.2     2013-09-30 [FBD]
658NetBSD 6.0.3        2013-09-30 [NBD]
659NetBSD 6.1.2        2013-09-30 [NBD]
660Mac OS X 10.9       2013-10-22 [APL]
661OpenBSD 5.4     2013-11-01 [OBD]
662DragonFly 3.6.0     2013-11-25 [DFB]
663FreeBSD 10.0        2014-01-20 [FBD]
664NetBSD 6.0.4        2014-01-27 [NBD]
665NetBSD 6.1.3        2014-01-27 [NBD]
666DragonFly 3.6.1     2014-02-22 [DFB]
667DragonFly 3.6.2     2014-04-10 [DFB]
668NetBSD 6.0.5        2014-04-19 [NDB]
669NetBSD 6.1.4        2014-04-19 [NDB]
670OpenBSD 5.5     2014-05-01 [OBD]
671DragonFly 3.8.0     2014-06-04 [DFB]
672DragonFly 3.8.1     2014-06-16 [DFB]
673DragonFly 3.6.3     2014-06-17 [DFB]
674FreeBSD 9.3     2014-07-05 [FBD]
675DragonFly 3.8.2     2014-08-08 [DFB]
676NetBSD 6.1.5        2014-09-22 [NBD]
677Mac OS X 10.10      2014-10-16 [APL]
678OpenBSD 5.6     2014-11-01 [OBD]
679FreeBSD 10.1        2014-11-14 [FBD]
680DragonFly 4.0.1     2014-11-25 [DFB]
681DragonFly 4.0.2     2015-01-07 [DFB]
682DragonFly 4.0.3     2015-01-21 [DFB]
683DragonFly 4.0.4     2015-03-09 [DFB]
684DragonFly 4.0.5     2015-03-23 [DFB]
685OpenBSD 5.7     2015-05-01 [OBD]
686DragonFly 4.2.0     2015-06-29 [DFB]
687FreeBSD 10.2            2015-08-13 [FBD]
688NetBSD 7.0      2015-09-25 [NBD]
689OS X 10.11      2015-09-30 [APL]
690OpenBSD 5.8     2015-10-18 [OBD]
691DragonFly 4.4.1     2015-12-07 [DFB]
692OpenBSD 5.9     2016-03-29 [OBD]
693FreeBSD 10.3        2016-04-04 [FBD]
694DragonFly 4.6.0     2016-08-02 [DFB]
695OpenBSD 6.0     2016-09-01 [OBD]
696
697Bibliography
698------------------------
699
700Leffler, Samuel J., Marshall Kirk McKusick, Michael J Karels and John
701Quarterman. The Design and Implementation of the 4.3BSD UNIX Operating
702System. Reading, Mass. Addison-Wesley, 1989. ISBN 0-201-06196-1
703
704Salus, Peter H. A quarter century of UNIX. Addison-Wesley Publishing
705Company, Inc., 1994. ISBN 0-201-54777-5
706
707McKusick, Marshall Kirk, Keith Bostic, Michael J Karels, and John
708Quarterman. The Design and Implementation of the 4.4BSD Operating
709System. Reading, Mass. Addison-Wesley, 1996. ISBN 0-201-54979-4
710
711McKusick, Marshall Kirk, George Neville-Neil. The Design and
712Implementation of the FreeBSD Operating System.
713Addison-Wesley Professional, Published: Aug 2, 2004. ISBN 0-201-70245-2
714
715McKusick, Marshall Kirk, George Neville-Neil, Robert Watson. The
716Design and Implementation of the FreeBSD Operating System, 2nd Edition.
717Pearson Education, Inc., 2014. ISBN 0-321-96897-2
718
719Doug McIlroy. Research Unix Reader.
720
721Michael G. Brown. The Role of BSD in the Development of Unix.
722Presented to the Tasmanian Unix Special Interest Group of the
723Australian Computer Society, Hobart, August 1993.
724
725Peter H. Salus. Unix at 25. Byte Magazine, October 1994.
726URL: http://www.byte.com/art/9410/sec8/art3.htm
727
728Andreas Klemm, Lars K��ller. If you're going to San Francisco ...
729Die freien BSD-Varianten von Unix. c't April 1997, page 368ff.
730
731BSD Release Announcements collection.
732URL: http://www.FreeBSD.org/releases/
733
734BSD Hypertext Man Pages
735URL: http://www.FreeBSD.org/cgi/man.cgi
736
737UNIX history graphing project
738URL: http://minnie.tuhs.org/Unix_History/index.html
739
740UNIX history
741URL: http://www.levenez.com/unix/
742
743James Howard: The BSD Family Tree
744URL: http://ezine.daemonnews.org/200104/bsd_family.html
745("what are the differences between FreeBSD, NetBSD, and OpenBSD?")
746
747
748Acknowledgments
749---------------
750
751Josh Gilliam for suggestions, bug fixes, and finding very old
752original BSD announcements from Usenet or tapes.
753
754Steven M. Schultz for providing 2.8BSD, 2.10BSD, 2.11BSD manual pages.
755
756--
757Copyright (c) 1997-2012 Wolfram Schneider <wosch@FreeBSD.ORG>
758URL: http://svnweb.freebsd.org/base/head/share/misc/bsd-family-tree
759
760$FreeBSD: head/share/misc/bsd-family-tree 305215 2016-09-01 17:05:54Z maxim $
761