bsd-family-tree: Sync with FreeBSD.
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1 The UNIX system family tree: Research and BSD
2 ---------------------------------------------
3
4 First Edition (V1)
5      |
6 Second Edition (V2)
7      |
8 Third Edition (V3)
9      |
10 Fourth Edition (V4)
11      |
12 Fifth Edition (V5)
13      |
14 Sixth Edition (V6) -----*
15        \                |
16         \               |
17          \              |
18 Seventh 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      /            |                      |
38 Eighth Edition    |                   2.9BSD-Seismo
39      |            |                      |
40      +----<--- 4.2BSD               2.9.1BSD
41      |            |                      |
42      +----<--- 4.3BSD -------------> 2.10BSD
43      |            |               /      |
44 Ninth Edition     |              / 2.10.1BSD
45      |         4.3BSD Tahoe-----+        |
46      |            |              \       |
47      |            |                \     |
48      v            |                  2.11BSD
49 Tenth Edition     |                      |
50                   |                  2.11BSD rev #430
51                4.3BSD NET/1              |
52                   |                      v
53                4.3BSD Reno
54                   |
55    *---------- 4.3BSD NET/2 -------------------+-------------*
56    |                    |                      |             |
57 386BSD 0.0              |                      |           BSD/386 ALPHA
58    |                    |                      |             |
59 386BSD 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    |               /    |                      |             |
67 FreeBSD 1.0 <-----'  NetBSD 0.9                |           BSD/386 1.1
68    |                    |           .----- 4.4BSD Lite       |
69 FreeBSD 1.1             |          /   /       |     \       |
70    |                    |         /   /        |      \      |
71 FreeBSD 1.1.5       .---|--------'   /         |       \     |
72    |               /    |           /          |        \    |
73 FreeBSD 1.1.5.1   /     |          /           |         \   |
74    |             /   NetBSD 1.0 <-'            |          \  |
75    |            /       |                      |           \ |
76 FreeBSD 2.0 <--'        |                      |           BSD/OS 2.0
77    |                     \                     |             |
78 FreeBSD 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     |
85 FreeBSD 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  |                   | |     |    |            |             |
118 FreeBSD 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
130 FreeBSD 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  |                    |      |                 |                      \
177 FreeBSD 5.0           |      |                 |                       |
178  |                    |      |                 |                       |
179 FreeBSD 5.1           |      |                 |                 DragonFly 1.0
180  |          \         |      |                 |                       |
181  |           ----- Mac OS X  |                 |                       |
182  |                   10.3    |                 |                       |
183 FreeBSD 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  |                    |      |                 |                       |
325  |                    |      |                 |                       |
326  |                    |      |                 |                       |
327  |                    |      |                 |                       |
328 FreeBSD 11 -current   |  NetBSD -current  OpenBSD -current     DragonFly -current
329  |                    |      |                 |                       |
330  v                    v      v                 v                       v
331
332 Time
333 ----------------
334
335 Time tolerance +/- 6 months, depending on which book/article you read; if it
336 was the announcement in Usenet or if it was available as tape.
337
338 [44B] McKusick, Marshall Kirk, Keith Bostic, Michael J Karels,
339         and John Quarterman. The Design and Implementation of
340         the 4.4BSD Operating System.
341 [APL] Apple website [http://www.apple.com/macosx/]
342 [BSDI] Berkeley Software Design, Inc.
343 [DFB] DragonFlyBSD Project, The.
344 [DOC] README, COPYRIGHT on tape.
345 [FBD] FreeBSD Project, The.
346 [KB]  Keith Bostic. BSD2.10 available from Usenix. comp.unix.sources,
347         Volume 11, Info 4, April, 1987.
348 [KKK] Mike Karels, Kirk McKusick, and Keith Bostic. tahoe announcement.
349         comp.bugs.4bsd.ucb-fixes, June 15, 1988.
350 [KSJ] Michael J. Karels, Carl F. Smith, and William F. Jolitz.
351         Changes in the Kernel in 2.9BSD. Second Berkeley Software
352         Distribution UNIX Version 2.9, July, 1983.
353 [NBD] NetBSD Project, The.
354 [OBD] OpenBSD Project, The.
355 [QCU] Salus, Peter H. A quarter century of UNIX.
356 [SMS] Steven M. Schultz. 2.11BSD, UNIX for the PDP-11.
357 [TUHS] The Unix Historical Society.  http://minnie.tuhs.org/Unix_History/.
358 [USE] Usenet announcement.
359 [WRS] Wind River Systems, Inc.
360 [dmr] Dennis Ritchie, via E-Mail
361
362 Multics                 1965
363 UNIX                    Summer 1969
364                                 DEC PDP-7
365 First   Edition         1971-11-03 [QCU]
366                                 DEC PDP-11/20, Assembler
367 Second  Edition         1972-06-12 [QCU]
368                                 10 UNIX installations
369 Third   Edition         1973-02-xx [QCU]
370                                 Pipes, 16 installations
371 Fourth  Edition         1973-11-xx [QCU]
372                                 rewriting in C effected,
373                                 above 30 installations
374 Fifth   Edition         1974-06-xx [QCU]
375                                 above 50 installations
376 Sixth   Edition         1975-05-xx [QCU]
377                                 port to DEC Vax
378 Seventh Edition         1979-01-xx [QCU]
379                                 first portable UNIX
380 Eighth  Edition         1985-02-xx [QCU]
381                                 VAX 11/750, VAX 11/780 [dmr]
382                                 descended from 4.1c BSD [dmr]
383                                 descended from 4.1 BSD [44B]
384                         scooping-out and replacement of the character-device
385                         and networking part by the streams mechanism
386
387 Ninth   Edition         1986-09-xx [QCU]
388 Tenth   Edition         1989-10-xx [QCU]
389
390 1BSD                    late 1977
391                         1978-03-09 [QCU]
392                                 PDP-11, Pascal, ex(1)
393                                 30 free copies of 1BSD sent out
394                                 35 tapes sold for 50 USD [QCU]
395 2BSD                    mid 1978 [QCU] 1979-05-10 [TUHS]
396                                 75 2BSD tapes shipped
397 2.79BSD                 1980-04-xx [TUHS]
398 2.8BSD                  1981-07-xx [KSJ]
399
400 2.8.1BSD                1982-01-xx [QCU]
401                                 set of performance improvements
402 2.9BSD                  1983-07-xx [KSJ]
403 2.9.1BSD                1983-11-xx [TUHS]
404 2.9BSD-Seismo           1985-08-xx [SMS]
405 2.10BSD                 1987-04-xx [KKK]
406 2.10.1BSD               1989-01-xx [SMS]
407 2.11BSD                 1992-02-xx [SMS]
408 2.11BSD rev #430        1999-12-13 [SMS]
409
410 32V                     1978-1[01]-xx [QCU]
411 3BSD                    late 1979 [QCU] March 1980 [TUHS]
412                                 virtual memory, page replacement,
413                                 demand paging
414 4.0BSD                  1980-10-xx
415 4.1BSD                  1981-07-08 [DOC]
416 4.1aBSD                 1982-04-xx
417                                 alpha release, 100 sites, networking [44B]
418 4.1bBSD                         internal release, fast filesystem [44B]
419 4.1cBSD                 late 1982
420                                 beta release, IPC [44B]
421 4.2BSD                  1983-09-xx [QCU]
422                         1983-08-03 [DOC]
423 4.3BSD                  1986-06-xx [QCU]
424                         1986-04-05 [KB], [DOC]
425 4.3BSD Tahoe            1988-06-15 [QCU], [DOC]
426 4.3BSD NET/1            1988-11-xx [QCU]
427                         1989-01-01 [DOC]
428 4.3BSD Reno             1990-06-29 [QCU], [DOC]
429 4.3BSD NET/2            1991-06-28 [QCU], [DOC]
430
431 BSD/386 ALPHA           1991-12-xx [BSDI]
432                                 first code released to people outside BSDI
433 386BSD 0.0              1992-02-xx [DOC]
434 BSD/386 0.3.1           1992-04-xx [BSDI] first ext. beta; B customers
435 BSD/386 0.3.3           1992-06-xx [BSDI] first CDROM version
436 386BSD 0.1              1992-07-28 [DOC]
437 4.4BSD Alpha            1992-07-07
438 BSD/386 0.9.3           1992-10-xx [BSDI]
439                                 first external gamma; G customers
440 BSD/386 0.9.4           1992-12-xx [BSDI]
441                                 would have been 1.0 except for request
442                                 for preliminary injunction
443 BSD/386 1.0             1993-03-xx [BSDI]
444                                 injunction denied; first official release
445 NetBSD 0.8              1993-04-20 [NBD]
446 4.4BSD                  1993-06-01 [USE]
447 NetBSD 0.9              1993-08-23 [NBD]
448 FreeBSD 1.0             1993-11-01 [FBD]
449 FreeBSD 1.0.2           1993-11-14 [FBD]
450                                 supersedes 1.0 13 days after release.
451 BSD/386 1.1             1994-02-xx [BSDI]
452 4.4BSD Lite             1994-03-01 [USE]
453 FreeBSD 1.1             1994-05-07 [FBD]
454 FreeBSD 1.1.5           1994-06-30 [FBD]
455 FreeBSD 1.1.5.1         1994-07-05 [FBD]
456                                 supersedes 1.1.5 5 days after release.
457 NetBSD 1.0              1994-10-26 [NBD]
458 386BSD 1.0              1994-11-12 [USE]
459 FreeBSD 2.0             1994-11-23 [FBD]
460 BSD/OS 2.0              1995-01-xx [BSDI] 4.4 lite based
461 FreeBSD 2.0.5           1995-06-10 [FBD]
462 BSD/OS 2.0.1            1995-06-xx [BSDI]
463 4.4BSD Lite Release 2   1995-06-xx [44B]
464                                 the true final distribution from the CSRG
465 FreeBSD 2.1.0           1995-11-19 [FBD]
466 NetBSD 1.1              1995-11-26 [NBD]
467 BSD/OS 2.1              1996-01-xx [BSDI]
468 FreeBSD 2.1.5           1996-07-14 [FBD]
469 NetBSD 1.2              1996-10-04 [NBD]
470 OpenBSD 2.0             1996-10-18 [OBD]
471 FreeBSD 2.1.6           1996-11-16 [FBD]
472 FreeBSD 2.1.6.1         1996-11-25 [FBD] (sendmail security release)
473 Rhapsody                1997-xx-xx
474 FreeBSD 2.1.7           1997-02-20 [FBD]
475 BSD/OS 3.0              1997-02-xx [BSDI] 4.4 lite2 based
476 FreeBSD 2.2.0           1997-03-16 [FBD]
477 FreeBSD 2.2.1           1997-03-25 [FBD]
478 FreeBSD 2.2.2           1997-05-16 [FBD]
479 NetBSD 1.2.1            1997-05-20 [NBD] (patch release)
480 OpenBSD 2.1             1997-06-01 [OBD]
481 FreeBSD 2.2.5           1997-10-22 [FBD]
482 OpenBSD 2.2             1997-12-01 [OBD]
483 NetBSD 1.3              1998-01-04 [NBD]
484 FreeBSD 2.2.6           1998-03-25 [FBD]
485 NetBSD 1.3.1            1998-03-09 [NBD] (patch release)
486 BSD/OS 3.1              1998-03-xx [BSDI]
487 OpenBSD 2.3             1998-05-19 [OBD]
488 NetBSD 1.3.2            1998-05-29 [NBD] (patch release)
489 FreeBSD 2.2.7           1998-07-22 [FBD]
490 BSD/OS 4.0              1998-08-xx [BSDI]
491                                 2-lock MP support, ELF executables
492 FreeBSD 3.0             1998-10-16 [FBD]
493                                 FreeBSD-3.0 is a snapshot from -current,
494                                 while 3.1 and 3.2 are from 3.x-stable which
495                                 was branched quite some time after 3.0-release
496 FreeBSD 2.2.8           1998-11-29 [FBD]
497 OpenBSD 2.4             1998-12-01 [OBD]
498 NetBSD 1.3.3            1998-12-23 [NBD] (patch release)
499 FreeBSD 3.1             1999-02-15 [FBD]
500 BSD/OS 4.0.1            1999-03-xx [BSDI]
501 NetBSD 1.4              1999-05-12 [NBD]
502 FreeBSD 3.2             1999-05-17 [FBD]
503 OpenBSD 2.5             1999-05-19 [OBD]
504 NetBSD 1.4.1            1999-08-26 [NBD] (patch release)
505 FreeBSD 3.3             1999-09-17 [FBD]
506 OpenBSD 2.6             1999-12-01 [OBD]
507 FreeBSD 3.4             1999-12-20 [FBD]
508 BSD/OS 4.1              1999-12-xx [BSDI]
509 FreeBSD 4.0             2000-03-13 [FBD]
510 NetBSD 1.4.2            2000-03-19 [NBD] (patch release)
511 OpenBSD 2.7             2000-06-15 [OBD]
512 FreeBSD 3.5             2000-06-24 [FBD]
513 FreeBSD 4.1             2000-07-27 [FBD]
514 FreeBSD 3.5.1           2000-07-28 [FBD]
515 FreeBSD 4.1.1           2000-09-25 [FBD] (a network-only patch release)
516 FreeBSD 4.2             2000-11-21 [FBD]
517 NetBSD 1.4.3            2000-11-25 [NBD] (patch release)
518 BSD/OS 4.2              2000-11-29 [BSDI]
519 OpenBSD 2.8             2000-12-01 [OBD]
520 NetBSD 1.5              2000-12-06 [NBD]
521 Mac OS X 10.0           2001-03-24 [APL]
522 FreeBSD 4.3             2001-04-20 [FBD]
523 OpenBSD 2.9             2001-06-01 [OBD]
524 NetBSD 1.5.1            2001-07-11 [NBD] (patch release)
525 NetBSD 1.5.2            2001-09-13 [NBD] (patch release)
526 FreeBSD 4.4             2001-09-18 [FBD]
527 Mac OS X 10.1           2001-09-29 [APL]
528 OpenBSD 3.0             2001-12-01 [OBD]
529 FreeBSD 4.5             2002-01-29 [FBD]
530 BSD/OS 4.3              2002-03-14 [WRS]
531 OpenBSD 3.1             2002-05-19 [OBD]
532 FreeBSD 4.6             2002-06-15 [FBD]
533 NetBSD 1.5.3            2002-07-22 [NBD] (patch release)
534 FreeBSD 4.6.2           2002-08-15 [FBD] (patch release)
535 Mac OS X 10.2           2002-08-23 [APL]
536 NetBSD 1.6              2002-09-14 [NBD]
537 FreeBSD 4.7             2002-10-08 [FBD]
538 OpenBSD 3.2             2002-11-01 [OBD]
539 FreeBSD 5.0             2003-01-17 [FBD]
540                                 FreeBSD 5.0 is a separate branch off of
541                                 -current, similar to 3.0.
542 FreeBSD 4.8             2003-04-03 [FBD]
543 NetBSD 1.6.1            2003-04-21 [NBD] (patch release)
544 OpenBSD 3.3             2003-05-01 [OBD]
545 BSD/OS 5.0              2003-05-?? [WRS]
546 FreeBSD 5.1             2003-06-09 [FBD]
547 Mac OS X 10.3           2003-10-24 [APL]
548 FreeBSD 4.9             2003-10-28 [FBD]
549 BSD/OS 5.1 ISE          2003-10-?? [WRS] (final version)
550 OpenBSD 3.4             2003-11-01 [OBD]
551 FreeBSD 5.2             2004-01-12 [FBD]
552 FreeBSD 5.2.1           2004-02-22 [FBD] (patch release)
553 NetBSD 1.6.2            2004-03-01 [NBD] (patch release)
554 OpenBSD 3.5             2004-04-01 [OBD]
555 FreeBSD 4.10            2004-05-27 [FBD]
556 DragonFly 1.0           2004-07-12 [DFB]
557 OpenBSD 3.6             2004-10-29 [OBD]
558 FreeBSD 5.3             2004-11-06 [FBD]
559 NetBSD 2.0              2004-12-09 [NBD]
560 FreeBSD 4.11            2005-01-25 [FBD]
561 DragonFly 1.2.0         2005-04-08 [DFB]
562 NetBSD 2.0.2            2005-04-14 [NBD] (security/critical release)
563 Mac OS X 10.4           2005-04-29 [APL]
564 FreeBSD 5.4             2005-05-09 [FBD]
565 OpenBSD 3.7             2005-05-19 [OBD]
566 NetBSD 2.0.3            2005-10-31 [NBD] (security/critical release)
567 OpenBSD 3.8             2005-11-01 [OBD]
568 FreeBSD 6.0             2005-11-01 [FBD]
569 NetBSD 2.1              2005-11-02 [NBD]
570 NetBSD 3.0              2005-12-23 [NBD]
571 DragonFly 1.4.0         2006-01-08 [DFB]
572 FreeBSD 2.2.9           2006-04-01 [FBD]
573 OpenBSD 3.9             2006-05-01 [OBD]
574 FreeBSD 6.1             2006-05-08 [FBD]
575 FreeBSD 5.5             2006-05-25 [FBD]
576 NetBSD 3.0.1            2006-07-24 [NBD] (security/critical release)
577 DragonFly 1.6.0         2006-07-24 [DFB]
578 OpenBSD 4.0             2006-11-01 [OBD]
579 NetBSD 3.0.2            2006-11-04 [NBD] (security/critical release)
580 NetBSD 3.1              2006-11-04 [NBD]
581 FreeBSD 6.2             2007-01-15 [FBD]
582 DragonFly 1.8.0         2007-01-30 [DFB]
583 OpenBSD 4.1             2007-05-01 [OBD]
584 DragonFly 1.10.0        2007-08-06 [DFB]
585 Mac OS X 10.5           2007-10-26 [APL]
586 OpenBSD 4.2             2007-11-01 [OBD]
587 NetBSD 4.0              2007-12-19 [NBD]
588 FreeBSD 6.3             2008-01-18 [FBD]
589 DragonFly 1.12.0        2008-02-26 [DFB]
590 FreeBSD 7.0             2008-02-27 [FBD]
591 OpenBSD 4.3             2008-05-01 [OBD]
592 DragonFly 2.0.0         2008-07-21 [DFB]
593 OpenBSD 4.4             2008-11-01 [OBD]
594 FreeBSD 6.4             2008-11-28 [FBD]
595 FreeBSD 7.1             2009-01-04 [FBD]
596 DragonFly 2.2.0         2009-02-17 [DFB]
597 NetBSD 5.0              2009-04-29 [NBD]
598 OpenBSD 4.5             2009-05-01 [OBD]
599 FreeBSD 7.2             2009-05-04 [FBD]
600 Mac OS X 10.6           2009-06-08 [APL]
601 NetBSD 5.0.1            2009-08-02 [NBD] (security/critical release)
602 DragonFly 2.4.0         2009-09-16 [DFB]
603 OpenBSD 4.6             2009-10-18 [OBD]
604 FreeBSD 8.0             2009-11-26 [FBD]
605 NetBSD 5.0.2            2010-02-12 [NBD] (security/critical release)
606 FreeBSD 7.3             2010-03-23 [FBD]
607 DragonFly 2.6.0         2010-03-28 [DFB]
608 OpenBSD 4.7             2010-05-19 [OBD]
609 FreeBSD 8.1             2010-07-24 [FBD]
610 DragonFly 2.8.2         2010-10-30 [DFB]
611 OpenBSD 4.8             2010-11-01 [OBD]
612 NetBSD 5.1              2010-11-19 [NBD]
613 FreeBSD 7.4             2011-02-24 [FBD]
614 FreeBSD 8.2             2011-02-24 [FBD]
615 DragonFly 2.10.1        2011-04-26 [DFB]
616 OpenBSD 4.9             2011-05-01 [OBD]
617 Mac OS X 10.7           2011-07-20 [APL]
618 OpenBSD 5.0             2011-11-01 [OBD]
619 FreeBSD 9.0             2012-01-12 [FBD]
620 NetBSD 5.1.2            2012-02-02 [NBD] (security/critical release)
621 DragonFly 3.0.1         2012-02-21 [DFB]
622 FreeBSD 8.3             2012-04-18 [FBD]
623 OpenBSD 5.1             2012-05-01 [OBD]
624 Mac OS X 10.8           2012-07-25 [APL]
625 NetBSD 6.0              2012-10-17 [NBD]
626 OpenBSD 5.2             2012-11-01 [OBD]
627 DragonFly 3.2.1         2012-11-02 [DFB]
628 NetBSD 5.2              2012-12-03 [NBD]
629 NetBSD 6.0.1            2012-12-26 [NBD] (security/critical release)
630 FreeBSD 9.1             2012-12-30 [FBD]
631 DragonFly 3.4.1         2013-04-29 [DFB]
632 OpenBSD 5.3             2013-05-01 [OBD]
633 NetBSD 6.0.2            2013-05-18 [NBD] (security/critical release)
634 NetBSD 6.1              2013-05-18 [NBD]
635 FreeBSD 8.4             2013-06-07 [FBD]
636 NetBSD 6.1.1            2013-08-22 [NBD]
637 NetBSD 5.1.3            2013-09-29 [NBD]
638 NetBSD 5.2.1            2013-09-29 [NBD]
639 FreeBSD 9.2             2013-09-30 [FBD]
640 NetBSD 6.0.3            2013-09-30 [NBD]
641 NetBSD 6.1.2            2013-09-30 [NBD]
642 Mac OS X 10.9           2013-10-22 [APL]
643 OpenBSD 5.4             2013-11-01 [OBD]
644 DragonFly 3.6.0         2013-11-25 [DFB]
645 FreeBSD 10.0            2014-01-20 [FBD]
646 NetBSD 6.0.4            2014-01-27 [NBD]
647 NetBSD 6.1.3            2014-01-27 [NBD]
648 DragonFly 3.6.1         2014-02-22 [DFB]
649 DragonFly 3.6.2         2014-04-10 [DFB]
650 NetBSD 6.0.5            2014-04-19 [NDB]
651 NetBSD 6.1.4            2014-04-19 [NDB]
652 OpenBSD 5.5             2014-05-01 [OBD]
653 DragonFly 3.8.0         2014-06-04 [DFB]
654 DragonFly 3.8.1         2014-06-16 [DFB]
655 DragonFly 3.6.3         2014-06-17 [DFB]
656 FreeBSD 9.3             2014-07-05 [FBD]
657 DragonFly 3.8.2         2014-08-08 [DFB]
658 NetBSD 6.1.5            2014-09-22 [NDB]
659 Mac OS X 10.10          2014-10-16 [APL]
660 OpenBSD 5.6             2014-11-01 [OBD]
661 FreeBSD 10.1            2014-11-14 [FBD]
662 DragonFly 4.0.1         2014-11-25 [DFB]
663
664 Bibliography
665 ------------------------
666
667 Leffler, Samuel J., Marshall Kirk McKusick, Michael J Karels and John
668 Quarterman. The Design and Implementation of the 4.3BSD UNIX Operating
669 System. Reading, Mass. Addison-Wesley, 1989. ISBN 0-201-06196-1
670
671 Salus, Peter H. A quarter century of UNIX. Addison-Wesley Publishing
672 Company, Inc., 1994. ISBN 0-201-54777-5
673
674 McKusick, Marshall Kirk, Keith Bostic, Michael J Karels, and John
675 Quarterman. The Design and Implementation of the 4.4BSD Operating
676 System. Reading, Mass. Addison-Wesley, 1996. ISBN 0-201-54979-4
677
678 McKusick, Marshall Kirk, George Neville-Neil. The Design and
679 Implementation of the FreeBSD Operating System.
680 Addison-Wesley Professional, Published: Aug 2, 2004. ISBN 0-201-70245-2
681
682 Doug McIlroy. Research Unix Reader.
683
684 Michael G. Brown. The Role of BSD in the Development of Unix.
685 Presented to the Tasmanian Unix Special Interest Group of the
686 Australian Computer Society, Hobart, August 1993.
687
688 Peter H. Salus. Unix at 25. Byte Magazine, October 1994.
689 URL: http://www.byte.com/art/9410/sec8/art3.htm
690
691 Andreas Klemm, Lars Köller. If you're going to San Francisco ...
692 Die freien BSD-Varianten von Unix. c't April 1997, page 368ff.
693
694 BSD Release Announcements collection.
695 URL: http://www.FreeBSD.org/releases/
696
697 BSD Hypertext Man Pages
698 URL: http://www.FreeBSD.org/cgi/man.cgi
699
700 UNIX history graphing project
701 URL: http://minnie.tuhs.org/Unix_History/index.html
702
703 UNIX history
704 URL: http://www.levenez.com/unix/
705
706 James Howard: The BSD Family Tree
707 URL: http://ezine.daemonnews.org/200104/bsd_family.html
708 ("what are the differences between FreeBSD, NetBSD, and OpenBSD?")
709
710
711 Acknowledgments
712 ---------------
713
714 Josh Gilliam for suggestions, bug fixes, and finding very old
715 original BSD announcements from Usenet or tapes.
716
717 Steven M. Schultz for providing 2.8BSD, 2.10BSD, 2.11BSD manual pages.
718
719 --
720 Copyright (c) 1997-2012 Wolfram Schneider <wosch@FreeBSD.ORG>
721 URL: http://svnweb.freebsd.org/base/head/share/misc/bsd-family-tree
722
723 $FreeBSD: head/share/misc/bsd-family-tree 275189 2014-11-27 14:54:17Z maxim $