bsd-family-tree revision 313161
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 |     |       |      |      | |      |        |                       |
262 |     |       |      |      | |   NetBSD      |                       |
263 |     |       |      |      | |    5.1.4      |                       |
264 |     |       |      |      | |           OpenBSD 5.1                 |
265 |     |       |   Mac OS X  | `----.          |                       |
266 |     |       |     10.8    |       \         |                       |
267 |     |       |      |   NetBSD 6.0  |        |                       |
268 |     |       |      |      | | |    |    OpenBSD 5.2         DragonFly 3.2.1
269 |  FreeBSD    |      |      | | | NetBSD      |                       |
270 |    9.1      |      |      | | |   5.2       |                       |
271 |     |       |      |      | | |    |        |                       |
272 |     |       |      |      | | | NetBSD      |                       |
273 |     |       |      |      | | |  5.2.1      |                       |
274 |     |       |      |      | | |    |        |                       |
275 |     |       |      |      | | | NetBSD      |                       |
276 |     |       |      |      | | |  5.2.2      |                       |
277 |     |       |      |      | | |             |                       |
278 |     |       |      |      | |  \            |                       |
279 |     |       |      |      | |   NetBSD      |                       |
280 |     |       |      |      | |    6.0.1      |                       |
281 |     |       |      |      | |      |   OpenBSD 5.3          DragonFly 3.4.1
282 |     |       |      |      | |   NetBSD      |                       |
283 |     |       |      |      | |    6.0.2      |                       |
284 |     |       |      |      | |      |        |                       | 
285 |     |       |      |      | |   NetBSD      |                       |
286 |     |       |      |      | |    6.0.3      |                       |
287 |     |       |      |      | |      |        |                       |
288 |     |       |      |      | |   NetBSD      |                       |
289 |     |       |      |      | |    6.0.4      |                       |
290 |     |       |      |      | |      |        |                       |
291 |     |       |      |      | |   NetBSD      |                       |
292 |     |       |      |      | |    6.0.5      |                       |
293 |     |       |      |      | |               |                       |
294 |     |       |      |      | |`-NetBSD 6.1   |                       |
295 |     |    FreeBSD   |      |       |         |                       |
296 |     |      8.4     |      |    NetBSD 6.1.1 |                       |
297 |     |              |      |       |         |                       |
298 |  FreeBSD           |      |    NetBSD 6.1.2 |                       |
299 |    9.2          Mac OS X  |       |         |                       |
300 |     |             10.9    |       |    OpenBSD 5.4                  |
301 |     `-----.        |      |       |         |               DragonFly 3.6.0
302 |            \       |      |       |         |                       |
303 *--FreeBSD    |      |      |    NetBSD 6.1.3 |                       |
304 |   10.0      |      |      |       |         |                       |
305 |     |       |      |      |       |         |               DragonFly 3.6.1
306 |     |       |      |      |       |         |                       |
307 |     |       |      |      |       |         |                       |
308 |     |       |      |      |       |         |               DragonFly 3.6.2
309 |     |       |      |      |    NetBSD 6.1.4 |                       |
310 |     |       |      |      |       |         |                       |
311 |     |       |      |      |       |    OpenBSD 5.5                  |
312 |     |       |      |      |       |         |                       |
313 |     |       |      |      |       |         |               DragonFly 3.8.0
314 |     |       |      |      |       |         |                       |
315 |     |       |      |      |       |         |                       |
316 |     |       |      |      |       |         |               DragonFly 3.8.1
317 |     |       |      |      |       |         |                       |
318 |     |       |      |      |       |         |                       |
319 |     |       |      |      |       |         |               DragonFly 3.6.3
320 |     |       |      |      |       |         |                       |
321 |     |    FreeBSD   |      |       |         |                       |
322 |     |      9.3     |      |       |         |                       |
323 |     |              |      |    NetBSD 6.1.5 |               DragonFly 3.8.2
324 |     |           Mac OS X  |                 |                       |
325 |     |             10.10   |                 |                       |
326 |     |              |      |            OpenBSD 5.6                  |
327 |  FreeBSD           |      |                 |                       |
328 |   10.1             |      |                 |               DragonFly 4.0.1
329 |     |              |      |                 |                       |
330 |     |              |      |                 |               DragonFly 4.0.2
331 |     |              |      |                 |                       |
332 |     |              |      |                 |               DragonFly 4.0.3
333 |     |              |      |                 |                       |
334 |     |              |      |                 |               DragonFly 4.0.4
335 |     |              |      |                 |                       |
336 |     |              |      |                 |               DragonFly 4.0.5
337 |     |              |      |                 |                       |
338 |     |              |      |            OpenBSD 5.7                  |
339 |     |              |      |                 |               DragonFly 4.2.0
340 |  FreeBSD           |      |                 |                       |
341 |   10.2             |      |                 |                       |
342 |     |            OS X  NetBSD 7.0           |                       |
343 |     |            10.11    |            OpenBSD 5.8                  |
344 |     |              |      |                 |               DragonFly 4.4.1
345 |  FreeBSD           |      |            OpenBSD 5.9                  |
346 |   10.3             |      |                 |                       |
347 |                    |   NetBSD 7.0.1         |                       |
348 |                    |      |                 |               DragonFly 4.6.0
349 *--FreeBSD           |      |            OpenBSD 6.0                  |
350 |   11.0             |      |                 |                       |
351 |                    |      |                 |                       |
352 |                    |      |                 |                       |
353FreeBSD 12 -current   |  NetBSD -current  OpenBSD -current     DragonFly -current
354 |                    |      |                 |                       |
355 v                    v      v                 v                       v
356
357Time
358----------------
359
360Time tolerance +/- 6 months, depending on which book/article you read; if it
361was the announcement in Usenet or if it was available as tape.
362
363[44B] McKusick, Marshall Kirk, Keith Bostic, Michael J Karels,
364	and John Quarterman. The Design and Implementation of
365	the 4.4BSD Operating System.
366[APL] Apple website [http://www.apple.com/macosx/]
367[BSDI] Berkeley Software Design, Inc.
368[DFB] DragonFlyBSD Project, The.
369[DOC] README, COPYRIGHT on tape.
370[FBD] FreeBSD Project, The.
371[KB]  Keith Bostic. BSD2.10 available from Usenix. comp.unix.sources,
372	Volume 11, Info 4, April, 1987.
373[KKK] Mike Karels, Kirk McKusick, and Keith Bostic. tahoe announcement.
374	comp.bugs.4bsd.ucb-fixes, June 15, 1988.
375[KSJ] Michael J. Karels, Carl F. Smith, and William F. Jolitz.
376	Changes in the Kernel in 2.9BSD. Second Berkeley Software
377	Distribution UNIX Version 2.9, July, 1983.
378[NBD] NetBSD Project, The.
379[OBD] OpenBSD Project, The.
380[QCU] Salus, Peter H. A quarter century of UNIX.
381[SMS] Steven M. Schultz. 2.11BSD, UNIX for the PDP-11.
382[TUHS] The Unix Historical Society.  http://minnie.tuhs.org/Unix_History/.
383[USE] Usenet announcement.
384[WRS] Wind River Systems, Inc.
385[dmr] Dennis Ritchie, via E-Mail
386
387Multics                 1965
388UNIX                    Summer 1969
389				DEC PDP-7
390First   Edition         1971-11-03 [QCU]
391				DEC PDP-11/20, Assembler
392Second  Edition         1972-06-12 [QCU]
393				10 UNIX installations
394Third   Edition         1973-02-xx [QCU]
395				Pipes, 16 installations
396Fourth  Edition         1973-11-xx [QCU]
397				rewriting in C effected,
398                                above 30 installations
399Fifth   Edition         1974-06-xx [QCU]
400				above 50 installations
401Sixth   Edition         1975-05-xx [QCU]
402				port to DEC Vax
403Seventh Edition         1979-01-xx [QCU]
404				first portable UNIX
405Eighth  Edition         1985-02-xx [QCU]
406				VAX 11/750, VAX 11/780 [dmr]
407				descended from 4.1c BSD [dmr]
408				descended from 4.1 BSD [44B]
409			scooping-out and replacement of the character-device
410			and networking part by the streams mechanism
411
412Ninth   Edition         1986-09-xx [QCU]
413Tenth   Edition         1989-10-xx [QCU]
414
4151BSD                    late 1977
416			1978-03-09 [QCU]
417				PDP-11, Pascal, ex(1)
418				30 free copies of 1BSD sent out
419				35 tapes sold for 50 USD [QCU]
4202BSD                    mid 1978 [QCU] 1979-05-10 [TUHS]
421				75 2BSD tapes shipped
4222.79BSD			1980-04-xx [TUHS]
4232.8BSD			1981-07-xx [KSJ]
424
4252.8.1BSD		1982-01-xx [QCU]
426				set of performance improvements
4272.9BSD			1983-07-xx [KSJ]
4282.9.1BSD                1983-11-xx [TUHS]
4292.9BSD-Seismo		1985-08-xx [SMS]
4302.10BSD			1987-04-xx [KKK]
4312.10.1BSD		1989-01-xx [SMS]
4322.11BSD			1992-02-xx [SMS]
4332.11BSD rev #430	1999-12-13 [SMS]
434
43532V			1978-1[01]-xx [QCU]
4363BSD                    late 1979 [QCU] March 1980 [TUHS]
437				virtual memory, page replacement,
438                        	demand paging
4394.0BSD                  1980-10-xx
4404.1BSD                  1981-07-08 [DOC]
4414.1aBSD                 1982-04-xx
442				alpha release, 100 sites, networking [44B]
4434.1bBSD				internal release, fast filesystem [44B]
4444.1cBSD                 late 1982
445				beta release, IPC [44B]
4464.2BSD                  1983-09-xx [QCU]
447                        1983-08-03 [DOC]
4484.3BSD                  1986-06-xx [QCU]
449			1986-04-05 [KB], [DOC]
4504.3BSD Tahoe            1988-06-15 [QCU], [DOC]
4514.3BSD NET/1            1988-11-xx [QCU]
452                        1989-01-01 [DOC]
4534.3BSD Reno             1990-06-29 [QCU], [DOC]
4544.3BSD NET/2            1991-06-28 [QCU], [DOC]
455
456BSD/386 ALPHA		1991-12-xx [BSDI]
457				first code released to people outside BSDI
458386BSD 0.0              1992-02-xx [DOC]
459BSD/386 0.3.1	        1992-04-xx [BSDI] first ext. beta; B customers
460BSD/386 0.3.3		1992-06-xx [BSDI] first CDROM version
461386BSD 0.1              1992-07-28 [DOC]
4624.4BSD Alpha            1992-07-07
463BSD/386 0.9.3		1992-10-xx [BSDI]
464				first external gamma; G customers
465BSD/386 0.9.4		1992-12-xx [BSDI]
466				would have been 1.0 except for request
467				for preliminary injunction
468BSD/386 1.0 		1993-03-xx [BSDI]
469				injunction denied; first official release
470NetBSD 0.8              1993-04-20 [NBD]
4714.4BSD                  1993-06-01 [USE]
472NetBSD 0.9              1993-08-23 [NBD]
473FreeBSD 1.0		1993-11-01 [FBD]
474FreeBSD 1.0.2		1993-11-14 [FBD]
475				supersedes 1.0 13 days after release.
476BSD/386 1.1		1994-02-xx [BSDI]
4774.4BSD Lite             1994-03-01 [USE]
478FreeBSD 1.1		1994-05-07 [FBD]
479FreeBSD 1.1.5		1994-06-30 [FBD]
480FreeBSD 1.1.5.1		1994-07-05 [FBD]
481				supersedes 1.1.5 5 days after release.
482NetBSD 1.0              1994-10-26 [NBD]
483386BSD 1.0              1994-11-12 [USE]
484FreeBSD 2.0		1994-11-23 [FBD]
485BSD/OS 2.0		1995-01-xx [BSDI] 4.4 lite based
486FreeBSD 2.0.5		1995-06-10 [FBD]
487BSD/OS 2.0.1		1995-06-xx [BSDI]
4884.4BSD Lite Release 2	1995-06-xx [44B]
489				the true final distribution from the CSRG
490FreeBSD 2.1.0		1995-11-19 [FBD]
491NetBSD 1.1              1995-11-26 [NBD]
492BSD/OS 2.1		1996-01-xx [BSDI]
493FreeBSD 2.1.5		1996-07-14 [FBD]
494NetBSD 1.2              1996-10-04 [NBD]
495OpenBSD 2.0             1996-10-18 [OBD]
496FreeBSD 2.1.6		1996-11-16 [FBD]
497FreeBSD 2.1.6.1		1996-11-25 [FBD] (sendmail security release)
498Rhapsody		1997-xx-xx
499FreeBSD 2.1.7		1997-02-20 [FBD]
500BSD/OS 3.0		1997-02-xx [BSDI] 4.4 lite2 based
501FreeBSD 2.2.0		1997-03-16 [FBD]
502FreeBSD 2.2.1		1997-03-25 [FBD]
503FreeBSD 2.2.2		1997-05-16 [FBD]
504NetBSD 1.2.1            1997-05-20 [NBD] (patch release)
505OpenBSD 2.1             1997-06-01 [OBD]
506FreeBSD 2.2.5		1997-10-22 [FBD]
507OpenBSD 2.2             1997-12-01 [OBD]
508NetBSD 1.3              1998-01-04 [NBD]
509FreeBSD 2.2.6		1998-03-25 [FBD]
510NetBSD 1.3.1            1998-03-09 [NBD] (patch release)
511BSD/OS 3.1		1998-03-xx [BSDI]
512OpenBSD 2.3             1998-05-19 [OBD]
513NetBSD 1.3.2            1998-05-29 [NBD] (patch release)
514FreeBSD 2.2.7		1998-07-22 [FBD]
515BSD/OS 4.0		1998-08-xx [BSDI]
516				2-lock MP support, ELF executables
517FreeBSD 3.0		1998-10-16 [FBD]
518				FreeBSD-3.0 is a snapshot from -current,
519				while 3.1 and 3.2 are from 3.x-stable which
520				was branched quite some time after 3.0-release
521FreeBSD 2.2.8           1998-11-29 [FBD]
522OpenBSD 2.4             1998-12-01 [OBD]
523NetBSD 1.3.3            1998-12-23 [NBD] (patch release)
524FreeBSD 3.1		1999-02-15 [FBD]
525BSD/OS 4.0.1		1999-03-xx [BSDI]
526NetBSD 1.4              1999-05-12 [NBD]
527FreeBSD 3.2             1999-05-17 [FBD]
528OpenBSD 2.5             1999-05-19 [OBD]
529NetBSD 1.4.1            1999-08-26 [NBD] (patch release)
530FreeBSD 3.3             1999-09-17 [FBD]
531OpenBSD 2.6             1999-12-01 [OBD]
532FreeBSD 3.4             1999-12-20 [FBD]
533BSD/OS 4.1		1999-12-xx [BSDI]
534FreeBSD 4.0             2000-03-13 [FBD]
535NetBSD 1.4.2            2000-03-19 [NBD] (patch release)
536OpenBSD 2.7             2000-06-15 [OBD]
537FreeBSD 3.5		2000-06-24 [FBD]
538FreeBSD 4.1		2000-07-27 [FBD]
539FreeBSD 3.5.1		2000-07-28 [FBD]
540FreeBSD 4.1.1		2000-09-25 [FBD] (a network-only patch release)
541FreeBSD 4.2  		2000-11-21 [FBD]
542NetBSD 1.4.3		2000-11-25 [NBD] (patch release)
543BSD/OS 4.2		2000-11-29 [BSDI]
544OpenBSD 2.8		2000-12-01 [OBD]
545NetBSD 1.5              2000-12-06 [NBD]
546Mac OS X 10.0           2001-03-24 [APL]
547FreeBSD 4.3  		2001-04-20 [FBD]
548OpenBSD 2.9  		2001-06-01 [OBD]
549NetBSD 1.5.1		2001-07-11 [NBD] (patch release)
550NetBSD 1.5.2		2001-09-13 [NBD] (patch release)
551FreeBSD 4.4  		2001-09-18 [FBD]
552Mac OS X 10.1		2001-09-29 [APL]
553OpenBSD 3.0		2001-12-01 [OBD]
554FreeBSD 4.5  		2002-01-29 [FBD]
555BSD/OS 4.3		2002-03-14 [WRS]
556OpenBSD 3.1		2002-05-19 [OBD]
557FreeBSD 4.6  		2002-06-15 [FBD]
558NetBSD 1.5.3		2002-07-22 [NBD] (patch release)
559FreeBSD 4.6.2		2002-08-15 [FBD] (patch release)
560Mac OS X 10.2		2002-08-23 [APL]
561NetBSD 1.6		2002-09-14 [NBD]
562FreeBSD 4.7		2002-10-08 [FBD]
563OpenBSD 3.2		2002-11-01 [OBD]
564FreeBSD 5.0		2003-01-17 [FBD]
565				FreeBSD 5.0 is a separate branch off of
566				-current, similar to 3.0.
567FreeBSD 4.8		2003-04-03 [FBD]
568NetBSD 1.6.1		2003-04-21 [NBD] (patch release)
569OpenBSD 3.3		2003-05-01 [OBD]
570BSD/OS 5.0		2003-05-?? [WRS]
571FreeBSD 5.1		2003-06-09 [FBD]
572Mac OS X 10.3		2003-10-24 [APL]
573FreeBSD 4.9		2003-10-28 [FBD]
574BSD/OS 5.1 ISE		2003-10-?? [WRS] (final version)
575OpenBSD 3.4		2003-11-01 [OBD]
576FreeBSD 5.2		2004-01-12 [FBD]
577FreeBSD 5.2.1		2004-02-22 [FBD] (patch release)
578NetBSD 1.6.2		2004-03-01 [NBD] (patch release)
579OpenBSD 3.5		2004-04-01 [OBD]
580FreeBSD 4.10		2004-05-27 [FBD]
581DragonFly 1.0		2004-07-12 [DFB]
582OpenBSD 3.6		2004-10-29 [OBD]
583FreeBSD 5.3		2004-11-06 [FBD]
584NetBSD 2.0		2004-12-09 [NBD]
585FreeBSD 4.11		2005-01-25 [FBD]
586DragonFly 1.2.0		2005-04-08 [DFB]
587NetBSD 2.0.2		2005-04-14 [NBD] (security/critical release)
588Mac OS X 10.4		2005-04-29 [APL]
589FreeBSD 5.4		2005-05-09 [FBD]
590OpenBSD 3.7		2005-05-19 [OBD]
591NetBSD 2.0.3		2005-10-31 [NBD] (security/critical release)
592OpenBSD 3.8		2005-11-01 [OBD]
593FreeBSD 6.0		2005-11-01 [FBD]
594NetBSD 2.1		2005-11-02 [NBD]
595NetBSD 3.0		2005-12-23 [NBD]
596DragonFly 1.4.0		2006-01-08 [DFB]
597FreeBSD 2.2.9		2006-04-01 [FBD]
598OpenBSD 3.9		2006-05-01 [OBD]
599FreeBSD 6.1		2006-05-08 [FBD]
600FreeBSD 5.5		2006-05-25 [FBD]
601NetBSD 3.0.1		2006-07-24 [NBD] (security/critical release)
602DragonFly 1.6.0		2006-07-24 [DFB]
603OpenBSD 4.0		2006-11-01 [OBD]
604NetBSD 3.0.2		2006-11-04 [NBD] (security/critical release)
605NetBSD 3.1		2006-11-04 [NBD]
606FreeBSD 6.2		2007-01-15 [FBD]
607DragonFly 1.8.0		2007-01-30 [DFB]
608OpenBSD 4.1		2007-05-01 [OBD]
609DragonFly 1.10.0	2007-08-06 [DFB]
610Mac OS X 10.5		2007-10-26 [APL]
611OpenBSD 4.2		2007-11-01 [OBD]
612NetBSD 4.0		2007-12-19 [NBD]
613FreeBSD 6.3		2008-01-18 [FBD]
614DragonFly 1.12.0	2008-02-26 [DFB]
615FreeBSD 7.0		2008-02-27 [FBD]
616OpenBSD 4.3		2008-05-01 [OBD]
617DragonFly 2.0.0		2008-07-21 [DFB]
618OpenBSD 4.4		2008-11-01 [OBD]
619FreeBSD 6.4		2008-11-28 [FBD]
620FreeBSD 7.1		2009-01-04 [FBD]
621DragonFly 2.2.0		2009-02-17 [DFB]
622NetBSD 5.0		2009-04-29 [NBD]
623OpenBSD 4.5		2009-05-01 [OBD]
624FreeBSD 7.2		2009-05-04 [FBD]
625Mac OS X 10.6		2009-06-08 [APL]
626NetBSD 5.0.1		2009-08-02 [NBD] (security/critical release)
627DragonFly 2.4.0		2009-09-16 [DFB]
628OpenBSD 4.6		2009-10-18 [OBD]
629FreeBSD 8.0		2009-11-26 [FBD]
630NetBSD 5.0.2		2010-02-12 [NBD] (security/critical release)
631FreeBSD 7.3		2010-03-23 [FBD]
632DragonFly 2.6.0		2010-03-28 [DFB]
633OpenBSD 4.7		2010-05-19 [OBD]
634FreeBSD 8.1		2010-07-24 [FBD]
635DragonFly 2.8.2		2010-10-30 [DFB]
636OpenBSD 4.8		2010-11-01 [OBD]
637NetBSD 5.1		2010-11-19 [NBD]
638FreeBSD 7.4		2011-02-24 [FBD]
639FreeBSD 8.2		2011-02-24 [FBD]
640DragonFly 2.10.1	2011-04-26 [DFB]
641OpenBSD 4.9		2011-05-01 [OBD]
642Mac OS X 10.7		2011-07-20 [APL]
643OpenBSD 5.0		2011-11-01 [OBD]
644FreeBSD 9.0		2012-01-12 [FBD]
645NetBSD 5.1.2		2012-02-02 [NBD] (security/critical release)
646DragonFly 3.0.1		2012-02-21 [DFB]
647FreeBSD 8.3		2012-04-18 [FBD]
648OpenBSD 5.1		2012-05-01 [OBD]
649Mac OS X 10.8		2012-07-25 [APL]
650NetBSD 6.0		2012-10-17 [NBD]
651OpenBSD 5.2		2012-11-01 [OBD]
652DragonFly 3.2.1		2012-11-02 [DFB]
653NetBSD 5.2		2012-12-03 [NBD]
654NetBSD 6.0.1		2012-12-26 [NBD] (security/critical release)
655FreeBSD 9.1		2012-12-30 [FBD]
656DragonFly 3.4.1		2013-04-29 [DFB]
657OpenBSD 5.3		2013-05-01 [OBD]
658NetBSD 6.0.2		2013-05-18 [NBD] (security/critical release)
659NetBSD 6.1		2013-05-18 [NBD]
660FreeBSD 8.4		2013-06-07 [FBD]
661NetBSD 6.1.1		2013-08-22 [NBD]
662NetBSD 5.1.3		2013-09-29 [NBD]
663NetBSD 5.2.1		2013-09-29 [NBD]
664FreeBSD 9.2		2013-09-30 [FBD]
665NetBSD 6.0.3		2013-09-30 [NBD]
666NetBSD 6.1.2		2013-09-30 [NBD]
667Mac OS X 10.9		2013-10-22 [APL]
668OpenBSD 5.4		2013-11-01 [OBD]
669DragonFly 3.6.0 	2013-11-25 [DFB]
670FreeBSD 10.0		2014-01-20 [FBD]
671NetBSD 5.1.4		2014-01-25 [NBD]
672NetBSD 5.2.2		2014-01-25 [NBD]
673NetBSD 6.0.4		2014-01-25 [NBD]
674NetBSD 6.1.3		2014-01-25 [NBD]
675DragonFly 3.6.1 	2014-02-22 [DFB]
676DragonFly 3.6.2		2014-04-10 [DFB]
677NetBSD 6.0.5		2014-04-12 [NDB]
678NetBSD 6.1.4		2014-04-12 [NDB]
679OpenBSD 5.5		2014-05-01 [OBD]
680DragonFly 3.8.0		2014-06-04 [DFB]
681DragonFly 3.8.1		2014-06-16 [DFB]
682DragonFly 3.6.3		2014-06-17 [DFB]
683FreeBSD 9.3		2014-07-05 [FBD]
684DragonFly 3.8.2		2014-08-08 [DFB]
685NetBSD 6.1.5		2014-09-22 [NBD]
686Mac OS X 10.10		2014-10-16 [APL]
687OpenBSD 5.6		2014-11-01 [OBD]
688FreeBSD 10.1		2014-11-14 [FBD]
689DragonFly 4.0.1		2014-11-25 [DFB]
690DragonFly 4.0.2		2015-01-07 [DFB]
691DragonFly 4.0.3		2015-01-21 [DFB]
692DragonFly 4.0.4		2015-03-09 [DFB]
693DragonFly 4.0.5		2015-03-23 [DFB]
694OpenBSD 5.7		2015-05-01 [OBD]
695DragonFly 4.2.0		2015-06-29 [DFB]
696FreeBSD 10.2            2015-08-13 [FBD]
697NetBSD 7.0		2015-09-25 [NBD]
698OS X 10.11		2015-09-30 [APL]
699OpenBSD 5.8		2015-10-18 [OBD]
700DragonFly 4.4.1		2015-12-07 [DFB]
701OpenBSD 5.9		2016-03-29 [OBD]
702FreeBSD 10.3		2016-04-04 [FBD]
703NetBSD 7.0.1		2016-05-22 [NBD]
704DragonFly 4.6.0		2016-08-02 [DFB]
705OpenBSD 6.0		2016-09-01 [OBD]
706FreeBSD 11.0		2016-10-10 [FBD]
707
708Bibliography
709------------------------
710
711Leffler, Samuel J., Marshall Kirk McKusick, Michael J Karels and John
712Quarterman. The Design and Implementation of the 4.3BSD UNIX Operating
713System. Reading, Mass. Addison-Wesley, 1989. ISBN 0-201-06196-1
714
715Salus, Peter H. A quarter century of UNIX. Addison-Wesley Publishing
716Company, Inc., 1994. ISBN 0-201-54777-5
717
718McKusick, Marshall Kirk, Keith Bostic, Michael J Karels, and John
719Quarterman. The Design and Implementation of the 4.4BSD Operating
720System. Reading, Mass. Addison-Wesley, 1996. ISBN 0-201-54979-4
721
722McKusick, Marshall Kirk, George Neville-Neil. The Design and
723Implementation of the FreeBSD Operating System.
724Addison-Wesley Professional, Published: Aug 2, 2004. ISBN 0-201-70245-2
725
726McKusick, Marshall Kirk, George Neville-Neil, Robert Watson. The
727Design and Implementation of the FreeBSD Operating System, 2nd Edition.
728Pearson Education, Inc., 2014. ISBN 0-321-96897-2
729
730Doug McIlroy. Research Unix Reader.
731
732Michael G. Brown. The Role of BSD in the Development of Unix.
733Presented to the Tasmanian Unix Special Interest Group of the
734Australian Computer Society, Hobart, August 1993.
735
736Peter H. Salus. Unix at 25. Byte Magazine, October 1994.
737URL: http://www.byte.com/art/9410/sec8/art3.htm
738
739Andreas Klemm, Lars K��ller. If you're going to San Francisco ...
740Die freien BSD-Varianten von Unix. c't April 1997, page 368ff.
741
742BSD Release Announcements collection.
743URL: http://www.FreeBSD.org/releases/
744
745BSD Hypertext Man Pages
746URL: http://www.FreeBSD.org/cgi/man.cgi
747
748UNIX history graphing project
749URL: http://minnie.tuhs.org/Unix_History/index.html
750
751UNIX history
752URL: http://www.levenez.com/unix/
753
754James Howard: The BSD Family Tree
755URL: http://ezine.daemonnews.org/200104/bsd_family.html
756("what are the differences between FreeBSD, NetBSD, and OpenBSD?")
757
758
759Acknowledgments
760---------------
761
762Josh Gilliam for suggestions, bug fixes, and finding very old
763original BSD announcements from Usenet or tapes.
764
765Steven M. Schultz for providing 2.8BSD, 2.10BSD, 2.11BSD manual pages.
766
767--
768Copyright (c) 1997-2012 Wolfram Schneider <wosch@FreeBSD.ORG>
769URL: http://svnweb.freebsd.org/base/head/share/misc/bsd-family-tree
770
771$FreeBSD: stable/10/share/misc/bsd-family-tree 313161 2017-02-03 16:15:06Z sevan $
772