xref: /freebsd/share/misc/bsd-family-tree (revision 39ee7a7a6bdd1557b1c3532abf60d139798ac88b)
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 |                    |      |                 |                       |
339FreeBSD 11 -current   |  NetBSD -current  OpenBSD -current     DragonFly -current
340 |                    |      |                 |                       |
341 v                    v      v                 v                       v
342
343Time
344----------------
345
346Time tolerance +/- 6 months, depending on which book/article you read; if it
347was the announcement in Usenet or if it was available as tape.
348
349[44B] McKusick, Marshall Kirk, Keith Bostic, Michael J Karels,
350	and John Quarterman. The Design and Implementation of
351	the 4.4BSD Operating System.
352[APL] Apple website [http://www.apple.com/macosx/]
353[BSDI] Berkeley Software Design, Inc.
354[DFB] DragonFlyBSD Project, The.
355[DOC] README, COPYRIGHT on tape.
356[FBD] FreeBSD Project, The.
357[KB]  Keith Bostic. BSD2.10 available from Usenix. comp.unix.sources,
358	Volume 11, Info 4, April, 1987.
359[KKK] Mike Karels, Kirk McKusick, and Keith Bostic. tahoe announcement.
360	comp.bugs.4bsd.ucb-fixes, June 15, 1988.
361[KSJ] Michael J. Karels, Carl F. Smith, and William F. Jolitz.
362	Changes in the Kernel in 2.9BSD. Second Berkeley Software
363	Distribution UNIX Version 2.9, July, 1983.
364[NBD] NetBSD Project, The.
365[OBD] OpenBSD Project, The.
366[QCU] Salus, Peter H. A quarter century of UNIX.
367[SMS] Steven M. Schultz. 2.11BSD, UNIX for the PDP-11.
368[TUHS] The Unix Historical Society.  http://minnie.tuhs.org/Unix_History/.
369[USE] Usenet announcement.
370[WRS] Wind River Systems, Inc.
371[dmr] Dennis Ritchie, via E-Mail
372
373Multics                 1965
374UNIX                    Summer 1969
375				DEC PDP-7
376First   Edition         1971-11-03 [QCU]
377				DEC PDP-11/20, Assembler
378Second  Edition         1972-06-12 [QCU]
379				10 UNIX installations
380Third   Edition         1973-02-xx [QCU]
381				Pipes, 16 installations
382Fourth  Edition         1973-11-xx [QCU]
383				rewriting in C effected,
384                                above 30 installations
385Fifth   Edition         1974-06-xx [QCU]
386				above 50 installations
387Sixth   Edition         1975-05-xx [QCU]
388				port to DEC Vax
389Seventh Edition         1979-01-xx [QCU]
390				first portable UNIX
391Eighth  Edition         1985-02-xx [QCU]
392				VAX 11/750, VAX 11/780 [dmr]
393				descended from 4.1c BSD [dmr]
394				descended from 4.1 BSD [44B]
395			scooping-out and replacement of the character-device
396			and networking part by the streams mechanism
397
398Ninth   Edition         1986-09-xx [QCU]
399Tenth   Edition         1989-10-xx [QCU]
400
4011BSD                    late 1977
402			1978-03-09 [QCU]
403				PDP-11, Pascal, ex(1)
404				30 free copies of 1BSD sent out
405				35 tapes sold for 50 USD [QCU]
4062BSD                    mid 1978 [QCU] 1979-05-10 [TUHS]
407				75 2BSD tapes shipped
4082.79BSD			1980-04-xx [TUHS]
4092.8BSD			1981-07-xx [KSJ]
410
4112.8.1BSD		1982-01-xx [QCU]
412				set of performance improvements
4132.9BSD			1983-07-xx [KSJ]
4142.9.1BSD                1983-11-xx [TUHS]
4152.9BSD-Seismo		1985-08-xx [SMS]
4162.10BSD			1987-04-xx [KKK]
4172.10.1BSD		1989-01-xx [SMS]
4182.11BSD			1992-02-xx [SMS]
4192.11BSD rev #430	1999-12-13 [SMS]
420
42132V			1978-1[01]-xx [QCU]
4223BSD                    late 1979 [QCU] March 1980 [TUHS]
423				virtual memory, page replacement,
424                        	demand paging
4254.0BSD                  1980-10-xx
4264.1BSD                  1981-07-08 [DOC]
4274.1aBSD                 1982-04-xx
428				alpha release, 100 sites, networking [44B]
4294.1bBSD				internal release, fast filesystem [44B]
4304.1cBSD                 late 1982
431				beta release, IPC [44B]
4324.2BSD                  1983-09-xx [QCU]
433                        1983-08-03 [DOC]
4344.3BSD                  1986-06-xx [QCU]
435			1986-04-05 [KB], [DOC]
4364.3BSD Tahoe            1988-06-15 [QCU], [DOC]
4374.3BSD NET/1            1988-11-xx [QCU]
438                        1989-01-01 [DOC]
4394.3BSD Reno             1990-06-29 [QCU], [DOC]
4404.3BSD NET/2            1991-06-28 [QCU], [DOC]
441
442BSD/386 ALPHA		1991-12-xx [BSDI]
443				first code released to people outside BSDI
444386BSD 0.0              1992-02-xx [DOC]
445BSD/386 0.3.1	        1992-04-xx [BSDI] first ext. beta; B customers
446BSD/386 0.3.3		1992-06-xx [BSDI] first CDROM version
447386BSD 0.1              1992-07-28 [DOC]
4484.4BSD Alpha            1992-07-07
449BSD/386 0.9.3		1992-10-xx [BSDI]
450				first external gamma; G customers
451BSD/386 0.9.4		1992-12-xx [BSDI]
452				would have been 1.0 except for request
453				for preliminary injunction
454BSD/386 1.0 		1993-03-xx [BSDI]
455				injunction denied; first official release
456NetBSD 0.8              1993-04-20 [NBD]
4574.4BSD                  1993-06-01 [USE]
458NetBSD 0.9              1993-08-23 [NBD]
459FreeBSD 1.0		1993-11-01 [FBD]
460FreeBSD 1.0.2		1993-11-14 [FBD]
461				supersedes 1.0 13 days after release.
462BSD/386 1.1		1994-02-xx [BSDI]
4634.4BSD Lite             1994-03-01 [USE]
464FreeBSD 1.1		1994-05-07 [FBD]
465FreeBSD 1.1.5		1994-06-30 [FBD]
466FreeBSD 1.1.5.1		1994-07-05 [FBD]
467				supersedes 1.1.5 5 days after release.
468NetBSD 1.0              1994-10-26 [NBD]
469386BSD 1.0              1994-11-12 [USE]
470FreeBSD 2.0		1994-11-23 [FBD]
471BSD/OS 2.0		1995-01-xx [BSDI] 4.4 lite based
472FreeBSD 2.0.5		1995-06-10 [FBD]
473BSD/OS 2.0.1		1995-06-xx [BSDI]
4744.4BSD Lite Release 2	1995-06-xx [44B]
475				the true final distribution from the CSRG
476FreeBSD 2.1.0		1995-11-19 [FBD]
477NetBSD 1.1              1995-11-26 [NBD]
478BSD/OS 2.1		1996-01-xx [BSDI]
479FreeBSD 2.1.5		1996-07-14 [FBD]
480NetBSD 1.2              1996-10-04 [NBD]
481OpenBSD 2.0             1996-10-18 [OBD]
482FreeBSD 2.1.6		1996-11-16 [FBD]
483FreeBSD 2.1.6.1		1996-11-25 [FBD] (sendmail security release)
484Rhapsody		1997-xx-xx
485FreeBSD 2.1.7		1997-02-20 [FBD]
486BSD/OS 3.0		1997-02-xx [BSDI] 4.4 lite2 based
487FreeBSD 2.2.0		1997-03-16 [FBD]
488FreeBSD 2.2.1		1997-03-25 [FBD]
489FreeBSD 2.2.2		1997-05-16 [FBD]
490NetBSD 1.2.1            1997-05-20 [NBD] (patch release)
491OpenBSD 2.1             1997-06-01 [OBD]
492FreeBSD 2.2.5		1997-10-22 [FBD]
493OpenBSD 2.2             1997-12-01 [OBD]
494NetBSD 1.3              1998-01-04 [NBD]
495FreeBSD 2.2.6		1998-03-25 [FBD]
496NetBSD 1.3.1            1998-03-09 [NBD] (patch release)
497BSD/OS 3.1		1998-03-xx [BSDI]
498OpenBSD 2.3             1998-05-19 [OBD]
499NetBSD 1.3.2            1998-05-29 [NBD] (patch release)
500FreeBSD 2.2.7		1998-07-22 [FBD]
501BSD/OS 4.0		1998-08-xx [BSDI]
502				2-lock MP support, ELF executables
503FreeBSD 3.0		1998-10-16 [FBD]
504				FreeBSD-3.0 is a snapshot from -current,
505				while 3.1 and 3.2 are from 3.x-stable which
506				was branched quite some time after 3.0-release
507FreeBSD 2.2.8           1998-11-29 [FBD]
508OpenBSD 2.4             1998-12-01 [OBD]
509NetBSD 1.3.3            1998-12-23 [NBD] (patch release)
510FreeBSD 3.1		1999-02-15 [FBD]
511BSD/OS 4.0.1		1999-03-xx [BSDI]
512NetBSD 1.4              1999-05-12 [NBD]
513FreeBSD 3.2             1999-05-17 [FBD]
514OpenBSD 2.5             1999-05-19 [OBD]
515NetBSD 1.4.1            1999-08-26 [NBD] (patch release)
516FreeBSD 3.3             1999-09-17 [FBD]
517OpenBSD 2.6             1999-12-01 [OBD]
518FreeBSD 3.4             1999-12-20 [FBD]
519BSD/OS 4.1		1999-12-xx [BSDI]
520FreeBSD 4.0             2000-03-13 [FBD]
521NetBSD 1.4.2            2000-03-19 [NBD] (patch release)
522OpenBSD 2.7             2000-06-15 [OBD]
523FreeBSD 3.5		2000-06-24 [FBD]
524FreeBSD 4.1		2000-07-27 [FBD]
525FreeBSD 3.5.1		2000-07-28 [FBD]
526FreeBSD 4.1.1		2000-09-25 [FBD] (a network-only patch release)
527FreeBSD 4.2  		2000-11-21 [FBD]
528NetBSD 1.4.3		2000-11-25 [NBD] (patch release)
529BSD/OS 4.2		2000-11-29 [BSDI]
530OpenBSD 2.8		2000-12-01 [OBD]
531NetBSD 1.5              2000-12-06 [NBD]
532Mac OS X 10.0           2001-03-24 [APL]
533FreeBSD 4.3  		2001-04-20 [FBD]
534OpenBSD 2.9  		2001-06-01 [OBD]
535NetBSD 1.5.1		2001-07-11 [NBD] (patch release)
536NetBSD 1.5.2		2001-09-13 [NBD] (patch release)
537FreeBSD 4.4  		2001-09-18 [FBD]
538Mac OS X 10.1		2001-09-29 [APL]
539OpenBSD 3.0		2001-12-01 [OBD]
540FreeBSD 4.5  		2002-01-29 [FBD]
541BSD/OS 4.3		2002-03-14 [WRS]
542OpenBSD 3.1		2002-05-19 [OBD]
543FreeBSD 4.6  		2002-06-15 [FBD]
544NetBSD 1.5.3		2002-07-22 [NBD] (patch release)
545FreeBSD 4.6.2		2002-08-15 [FBD] (patch release)
546Mac OS X 10.2		2002-08-23 [APL]
547NetBSD 1.6		2002-09-14 [NBD]
548FreeBSD 4.7		2002-10-08 [FBD]
549OpenBSD 3.2		2002-11-01 [OBD]
550FreeBSD 5.0		2003-01-17 [FBD]
551				FreeBSD 5.0 is a separate branch off of
552				-current, similar to 3.0.
553FreeBSD 4.8		2003-04-03 [FBD]
554NetBSD 1.6.1		2003-04-21 [NBD] (patch release)
555OpenBSD 3.3		2003-05-01 [OBD]
556BSD/OS 5.0		2003-05-?? [WRS]
557FreeBSD 5.1		2003-06-09 [FBD]
558Mac OS X 10.3		2003-10-24 [APL]
559FreeBSD 4.9		2003-10-28 [FBD]
560BSD/OS 5.1 ISE		2003-10-?? [WRS] (final version)
561OpenBSD 3.4		2003-11-01 [OBD]
562FreeBSD 5.2		2004-01-12 [FBD]
563FreeBSD 5.2.1		2004-02-22 [FBD] (patch release)
564NetBSD 1.6.2		2004-03-01 [NBD] (patch release)
565OpenBSD 3.5		2004-04-01 [OBD]
566FreeBSD 4.10		2004-05-27 [FBD]
567DragonFly 1.0		2004-07-12 [DFB]
568OpenBSD 3.6		2004-10-29 [OBD]
569FreeBSD 5.3		2004-11-06 [FBD]
570NetBSD 2.0		2004-12-09 [NBD]
571FreeBSD 4.11		2005-01-25 [FBD]
572DragonFly 1.2.0		2005-04-08 [DFB]
573NetBSD 2.0.2		2005-04-14 [NBD] (security/critical release)
574Mac OS X 10.4		2005-04-29 [APL]
575FreeBSD 5.4		2005-05-09 [FBD]
576OpenBSD 3.7		2005-05-19 [OBD]
577NetBSD 2.0.3		2005-10-31 [NBD] (security/critical release)
578OpenBSD 3.8		2005-11-01 [OBD]
579FreeBSD 6.0		2005-11-01 [FBD]
580NetBSD 2.1		2005-11-02 [NBD]
581NetBSD 3.0		2005-12-23 [NBD]
582DragonFly 1.4.0		2006-01-08 [DFB]
583FreeBSD 2.2.9		2006-04-01 [FBD]
584OpenBSD 3.9		2006-05-01 [OBD]
585FreeBSD 6.1		2006-05-08 [FBD]
586FreeBSD 5.5		2006-05-25 [FBD]
587NetBSD 3.0.1		2006-07-24 [NBD] (security/critical release)
588DragonFly 1.6.0		2006-07-24 [DFB]
589OpenBSD 4.0		2006-11-01 [OBD]
590NetBSD 3.0.2		2006-11-04 [NBD] (security/critical release)
591NetBSD 3.1		2006-11-04 [NBD]
592FreeBSD 6.2		2007-01-15 [FBD]
593DragonFly 1.8.0		2007-01-30 [DFB]
594OpenBSD 4.1		2007-05-01 [OBD]
595DragonFly 1.10.0	2007-08-06 [DFB]
596Mac OS X 10.5		2007-10-26 [APL]
597OpenBSD 4.2		2007-11-01 [OBD]
598NetBSD 4.0		2007-12-19 [NBD]
599FreeBSD 6.3		2008-01-18 [FBD]
600DragonFly 1.12.0	2008-02-26 [DFB]
601FreeBSD 7.0		2008-02-27 [FBD]
602OpenBSD 4.3		2008-05-01 [OBD]
603DragonFly 2.0.0		2008-07-21 [DFB]
604OpenBSD 4.4		2008-11-01 [OBD]
605FreeBSD 6.4		2008-11-28 [FBD]
606FreeBSD 7.1		2009-01-04 [FBD]
607DragonFly 2.2.0		2009-02-17 [DFB]
608NetBSD 5.0		2009-04-29 [NBD]
609OpenBSD 4.5		2009-05-01 [OBD]
610FreeBSD 7.2		2009-05-04 [FBD]
611Mac OS X 10.6		2009-06-08 [APL]
612NetBSD 5.0.1		2009-08-02 [NBD] (security/critical release)
613DragonFly 2.4.0		2009-09-16 [DFB]
614OpenBSD 4.6		2009-10-18 [OBD]
615FreeBSD 8.0		2009-11-26 [FBD]
616NetBSD 5.0.2		2010-02-12 [NBD] (security/critical release)
617FreeBSD 7.3		2010-03-23 [FBD]
618DragonFly 2.6.0		2010-03-28 [DFB]
619OpenBSD 4.7		2010-05-19 [OBD]
620FreeBSD 8.1		2010-07-24 [FBD]
621DragonFly 2.8.2		2010-10-30 [DFB]
622OpenBSD 4.8		2010-11-01 [OBD]
623NetBSD 5.1		2010-11-19 [NBD]
624FreeBSD 7.4		2011-02-24 [FBD]
625FreeBSD 8.2		2011-02-24 [FBD]
626DragonFly 2.10.1	2011-04-26 [DFB]
627OpenBSD 4.9		2011-05-01 [OBD]
628Mac OS X 10.7		2011-07-20 [APL]
629OpenBSD 5.0		2011-11-01 [OBD]
630FreeBSD 9.0		2012-01-12 [FBD]
631NetBSD 5.1.2		2012-02-02 [NBD] (security/critical release)
632DragonFly 3.0.1		2012-02-21 [DFB]
633FreeBSD 8.3		2012-04-18 [FBD]
634OpenBSD 5.1		2012-05-01 [OBD]
635Mac OS X 10.8		2012-07-25 [APL]
636NetBSD 6.0		2012-10-17 [NBD]
637OpenBSD 5.2		2012-11-01 [OBD]
638DragonFly 3.2.1		2012-11-02 [DFB]
639NetBSD 5.2		2012-12-03 [NBD]
640NetBSD 6.0.1		2012-12-26 [NBD] (security/critical release)
641FreeBSD 9.1		2012-12-30 [FBD]
642DragonFly 3.4.1		2013-04-29 [DFB]
643OpenBSD 5.3		2013-05-01 [OBD]
644NetBSD 6.0.2		2013-05-18 [NBD] (security/critical release)
645NetBSD 6.1		2013-05-18 [NBD]
646FreeBSD 8.4		2013-06-07 [FBD]
647NetBSD 6.1.1		2013-08-22 [NBD]
648NetBSD 5.1.3		2013-09-29 [NBD]
649NetBSD 5.2.1		2013-09-29 [NBD]
650FreeBSD 9.2		2013-09-30 [FBD]
651NetBSD 6.0.3		2013-09-30 [NBD]
652NetBSD 6.1.2		2013-09-30 [NBD]
653Mac OS X 10.9		2013-10-22 [APL]
654OpenBSD 5.4		2013-11-01 [OBD]
655DragonFly 3.6.0 	2013-11-25 [DFB]
656FreeBSD 10.0		2014-01-20 [FBD]
657NetBSD 6.0.4		2014-01-27 [NBD]
658NetBSD 6.1.3		2014-01-27 [NBD]
659DragonFly 3.6.1 	2014-02-22 [DFB]
660DragonFly 3.6.2		2014-04-10 [DFB]
661NetBSD 6.0.5		2014-04-19 [NDB]
662NetBSD 6.1.4		2014-04-19 [NDB]
663OpenBSD 5.5		2014-05-01 [OBD]
664DragonFly 3.8.0		2014-06-04 [DFB]
665DragonFly 3.8.1		2014-06-16 [DFB]
666DragonFly 3.6.3		2014-06-17 [DFB]
667FreeBSD 9.3		2014-07-05 [FBD]
668DragonFly 3.8.2		2014-08-08 [DFB]
669NetBSD 6.1.5		2014-09-22 [NBD]
670Mac OS X 10.10		2014-10-16 [APL]
671OpenBSD 5.6		2014-11-01 [OBD]
672FreeBSD 10.1		2014-11-14 [FBD]
673DragonFly 4.0.1		2014-11-25 [DFB]
674DragonFly 4.0.2		2015-01-07 [DFB]
675DragonFly 4.0.3		2015-01-21 [DFB]
676DragonFly 4.0.4		2015-03-09 [DFB]
677DragonFly 4.0.5		2015-03-23 [DFB]
678OpenBSD 5.7		2015-05-01 [OBD]
679DragonFly 4.2.0		2015-06-29 [DFB]
680FreeBSD 10.2            2015-08-13 [FBD]
681NetBSD 7.0		2015-09-25 [NBD]
682OS X 10.11		2015-09-30 [APL]
683OpenBSD 5.8		2015-10-18 [OBD]
684
685Bibliography
686------------------------
687
688Leffler, Samuel J., Marshall Kirk McKusick, Michael J Karels and John
689Quarterman. The Design and Implementation of the 4.3BSD UNIX Operating
690System. Reading, Mass. Addison-Wesley, 1989. ISBN 0-201-06196-1
691
692Salus, Peter H. A quarter century of UNIX. Addison-Wesley Publishing
693Company, Inc., 1994. ISBN 0-201-54777-5
694
695McKusick, Marshall Kirk, Keith Bostic, Michael J Karels, and John
696Quarterman. The Design and Implementation of the 4.4BSD Operating
697System. Reading, Mass. Addison-Wesley, 1996. ISBN 0-201-54979-4
698
699McKusick, Marshall Kirk, George Neville-Neil. The Design and
700Implementation of the FreeBSD Operating System.
701Addison-Wesley Professional, Published: Aug 2, 2004. ISBN 0-201-70245-2
702
703McKusick, Marshall Kirk, George Neville-Neil, Robert Watson. The
704Design and Implementation of the FreeBSD Operating System, 2nd Edition.
705Pearson Education, Inc., 2014. ISBN 0-321-96897-2
706
707Doug McIlroy. Research Unix Reader.
708
709Michael G. Brown. The Role of BSD in the Development of Unix.
710Presented to the Tasmanian Unix Special Interest Group of the
711Australian Computer Society, Hobart, August 1993.
712
713Peter H. Salus. Unix at 25. Byte Magazine, October 1994.
714URL: http://www.byte.com/art/9410/sec8/art3.htm
715
716Andreas Klemm, Lars Köller. If you're going to San Francisco ...
717Die freien BSD-Varianten von Unix. c't April 1997, page 368ff.
718
719BSD Release Announcements collection.
720URL: http://www.FreeBSD.org/releases/
721
722BSD Hypertext Man Pages
723URL: http://www.FreeBSD.org/cgi/man.cgi
724
725UNIX history graphing project
726URL: http://minnie.tuhs.org/Unix_History/index.html
727
728UNIX history
729URL: http://www.levenez.com/unix/
730
731James Howard: The BSD Family Tree
732URL: http://ezine.daemonnews.org/200104/bsd_family.html
733("what are the differences between FreeBSD, NetBSD, and OpenBSD?")
734
735
736Acknowledgments
737---------------
738
739Josh Gilliam for suggestions, bug fixes, and finding very old
740original BSD announcements from Usenet or tapes.
741
742Steven M. Schultz for providing 2.8BSD, 2.10BSD, 2.11BSD manual pages.
743
744--
745Copyright (c) 1997-2012 Wolfram Schneider <wosch@FreeBSD.ORG>
746URL: http://svnweb.freebsd.org/base/head/share/misc/bsd-family-tree
747
748$FreeBSD$
749