xref: /freebsd/share/misc/bsd-family-tree (revision cdc58367265a2bd6e8f913db2bdc591699ee229f)
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 |                    |      |                 |                       |
325 |                    |      |                 |                       |
326 |                    |      |                 |                       |
327 |                    |      |                 |                       |
328FreeBSD 11 -current   |  NetBSD -current  OpenBSD -current     DragonFly -current
329 |                    |      |                 |                       |
330 v                    v      v                 v                       v
331
332Time
333----------------
334
335Time tolerance +/- 6 months, depending on which book/article you read; if it
336was 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
362Multics                 1965
363UNIX                    Summer 1969
364				DEC PDP-7
365First   Edition         1971-11-03 [QCU]
366				DEC PDP-11/20, Assembler
367Second  Edition         1972-06-12 [QCU]
368				10 UNIX installations
369Third   Edition         1973-02-xx [QCU]
370				Pipes, 16 installations
371Fourth  Edition         1973-11-xx [QCU]
372				rewriting in C effected,
373                                above 30 installations
374Fifth   Edition         1974-06-xx [QCU]
375				above 50 installations
376Sixth   Edition         1975-05-xx [QCU]
377				port to DEC Vax
378Seventh Edition         1979-01-xx [QCU]
379				first portable UNIX
380Eighth  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
387Ninth   Edition         1986-09-xx [QCU]
388Tenth   Edition         1989-10-xx [QCU]
389
3901BSD                    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]
3952BSD                    mid 1978 [QCU] 1979-05-10 [TUHS]
396				75 2BSD tapes shipped
3972.79BSD			1980-04-xx [TUHS]
3982.8BSD			1981-07-xx [KSJ]
399
4002.8.1BSD		1982-01-xx [QCU]
401				set of performance improvements
4022.9BSD			1983-07-xx [KSJ]
4032.9.1BSD                1983-11-xx [TUHS]
4042.9BSD-Seismo		1985-08-xx [SMS]
4052.10BSD			1987-04-xx [KKK]
4062.10.1BSD		1989-01-xx [SMS]
4072.11BSD			1992-02-xx [SMS]
4082.11BSD rev #430	1999-12-13 [SMS]
409
41032V			1978-1[01]-xx [QCU]
4113BSD                    late 1979 [QCU] March 1980 [TUHS]
412				virtual memory, page replacement,
413                        	demand paging
4144.0BSD                  1980-10-xx
4154.1BSD                  1981-07-08 [DOC]
4164.1aBSD                 1982-04-xx
417				alpha release, 100 sites, networking [44B]
4184.1bBSD				internal release, fast filesystem [44B]
4194.1cBSD                 late 1982
420				beta release, IPC [44B]
4214.2BSD                  1983-09-xx [QCU]
422                        1983-08-03 [DOC]
4234.3BSD                  1986-06-xx [QCU]
424			1986-04-05 [KB], [DOC]
4254.3BSD Tahoe            1988-06-15 [QCU], [DOC]
4264.3BSD NET/1            1988-11-xx [QCU]
427                        1989-01-01 [DOC]
4284.3BSD Reno             1990-06-29 [QCU], [DOC]
4294.3BSD NET/2            1991-06-28 [QCU], [DOC]
430
431BSD/386 ALPHA		1991-12-xx [BSDI]
432				first code released to people outside BSDI
433386BSD 0.0              1992-02-xx [DOC]
434BSD/386 0.3.1	        1992-04-xx [BSDI] first ext. beta; B customers
435BSD/386 0.3.3		1992-06-xx [BSDI] first CDROM version
436386BSD 0.1              1992-07-28 [DOC]
4374.4BSD Alpha            1992-07-07
438BSD/386 0.9.3		1992-10-xx [BSDI]
439				first external gamma; G customers
440BSD/386 0.9.4		1992-12-xx [BSDI]
441				would have been 1.0 except for request
442				for preliminary injunction
443BSD/386 1.0 		1993-03-xx [BSDI]
444				injunction denied; first official release
445NetBSD 0.8              1993-04-20 [NBD]
4464.4BSD                  1993-06-01 [USE]
447NetBSD 0.9              1993-08-23 [NBD]
448FreeBSD 1.0		1993-11-01 [FBD]
449FreeBSD 1.0.2		1993-11-14 [FBD]
450				supersedes 1.0 13 days after release.
451BSD/386 1.1		1994-02-xx [BSDI]
4524.4BSD Lite             1994-03-01 [USE]
453FreeBSD 1.1		1994-05-07 [FBD]
454FreeBSD 1.1.5		1994-06-30 [FBD]
455FreeBSD 1.1.5.1		1994-07-05 [FBD]
456				supersedes 1.1.5 5 days after release.
457NetBSD 1.0              1994-10-26 [NBD]
458386BSD 1.0              1994-11-12 [USE]
459FreeBSD 2.0		1994-11-23 [FBD]
460BSD/OS 2.0		1995-01-xx [BSDI] 4.4 lite based
461FreeBSD 2.0.5		1995-06-10 [FBD]
462BSD/OS 2.0.1		1995-06-xx [BSDI]
4634.4BSD Lite Release 2	1995-06-xx [44B]
464				the true final distribution from the CSRG
465FreeBSD 2.1.0		1995-11-19 [FBD]
466NetBSD 1.1              1995-11-26 [NBD]
467BSD/OS 2.1		1996-01-xx [BSDI]
468FreeBSD 2.1.5		1996-07-14 [FBD]
469NetBSD 1.2              1996-10-04 [NBD]
470OpenBSD 2.0             1996-10-18 [OBD]
471FreeBSD 2.1.6		1996-11-16 [FBD]
472FreeBSD 2.1.6.1		1996-11-25 [FBD] (sendmail security release)
473Rhapsody		1997-xx-xx
474FreeBSD 2.1.7		1997-02-20 [FBD]
475BSD/OS 3.0		1997-02-xx [BSDI] 4.4 lite2 based
476FreeBSD 2.2.0		1997-03-16 [FBD]
477FreeBSD 2.2.1		1997-03-25 [FBD]
478FreeBSD 2.2.2		1997-05-16 [FBD]
479NetBSD 1.2.1            1997-05-20 [NBD] (patch release)
480OpenBSD 2.1             1997-06-01 [OBD]
481FreeBSD 2.2.5		1997-10-22 [FBD]
482OpenBSD 2.2             1997-12-01 [OBD]
483NetBSD 1.3              1998-01-04 [NBD]
484FreeBSD 2.2.6		1998-03-25 [FBD]
485NetBSD 1.3.1            1998-03-09 [NBD] (patch release)
486BSD/OS 3.1		1998-03-xx [BSDI]
487OpenBSD 2.3             1998-05-19 [OBD]
488NetBSD 1.3.2            1998-05-29 [NBD] (patch release)
489FreeBSD 2.2.7		1998-07-22 [FBD]
490BSD/OS 4.0		1998-08-xx [BSDI]
491				2-lock MP support, ELF executables
492FreeBSD 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
496FreeBSD 2.2.8           1998-11-29 [FBD]
497OpenBSD 2.4             1998-12-01 [OBD]
498NetBSD 1.3.3            1998-12-23 [NBD] (patch release)
499FreeBSD 3.1		1999-02-15 [FBD]
500BSD/OS 4.0.1		1999-03-xx [BSDI]
501NetBSD 1.4              1999-05-12 [NBD]
502FreeBSD 3.2             1999-05-17 [FBD]
503OpenBSD 2.5             1999-05-19 [OBD]
504NetBSD 1.4.1            1999-08-26 [NBD] (patch release)
505FreeBSD 3.3             1999-09-17 [FBD]
506OpenBSD 2.6             1999-12-01 [OBD]
507FreeBSD 3.4             1999-12-20 [FBD]
508BSD/OS 4.1		1999-12-xx [BSDI]
509FreeBSD 4.0             2000-03-13 [FBD]
510NetBSD 1.4.2            2000-03-19 [NBD] (patch release)
511OpenBSD 2.7             2000-06-15 [OBD]
512FreeBSD 3.5		2000-06-24 [FBD]
513FreeBSD 4.1		2000-07-27 [FBD]
514FreeBSD 3.5.1		2000-07-28 [FBD]
515FreeBSD 4.1.1		2000-09-25 [FBD] (a network-only patch release)
516FreeBSD 4.2  		2000-11-21 [FBD]
517NetBSD 1.4.3		2000-11-25 [NBD] (patch release)
518BSD/OS 4.2		2000-11-29 [BSDI]
519OpenBSD 2.8		2000-12-01 [OBD]
520NetBSD 1.5              2000-12-06 [NBD]
521Mac OS X 10.0           2001-03-24 [APL]
522FreeBSD 4.3  		2001-04-20 [FBD]
523OpenBSD 2.9  		2001-06-01 [OBD]
524NetBSD 1.5.1		2001-07-11 [NBD] (patch release)
525NetBSD 1.5.2		2001-09-13 [NBD] (patch release)
526FreeBSD 4.4  		2001-09-18 [FBD]
527Mac OS X 10.1		2001-09-29 [APL]
528OpenBSD 3.0		2001-12-01 [OBD]
529FreeBSD 4.5  		2002-01-29 [FBD]
530BSD/OS 4.3		2002-03-14 [WRS]
531OpenBSD 3.1		2002-05-19 [OBD]
532FreeBSD 4.6  		2002-06-15 [FBD]
533NetBSD 1.5.3		2002-07-22 [NBD] (patch release)
534FreeBSD 4.6.2		2002-08-15 [FBD] (patch release)
535Mac OS X 10.2		2002-08-23 [APL]
536NetBSD 1.6		2002-09-14 [NBD]
537FreeBSD 4.7		2002-10-08 [FBD]
538OpenBSD 3.2		2002-11-01 [OBD]
539FreeBSD 5.0		2003-01-17 [FBD]
540				FreeBSD 5.0 is a separate branch off of
541				-current, similar to 3.0.
542FreeBSD 4.8		2003-04-03 [FBD]
543NetBSD 1.6.1		2003-04-21 [NBD] (patch release)
544OpenBSD 3.3		2003-05-01 [OBD]
545BSD/OS 5.0		2003-05-?? [WRS]
546FreeBSD 5.1		2003-06-09 [FBD]
547Mac OS X 10.3		2003-10-24 [APL]
548FreeBSD 4.9		2003-10-28 [FBD]
549BSD/OS 5.1 ISE		2003-10-?? [WRS] (final version)
550OpenBSD 3.4		2003-11-01 [OBD]
551FreeBSD 5.2		2004-01-12 [FBD]
552FreeBSD 5.2.1		2004-02-22 [FBD] (patch release)
553NetBSD 1.6.2		2004-03-01 [NBD] (patch release)
554OpenBSD 3.5		2004-04-01 [OBD]
555FreeBSD 4.10		2004-05-27 [FBD]
556DragonFly 1.0		2004-07-12 [DFB]
557OpenBSD 3.6		2004-10-29 [OBD]
558FreeBSD 5.3		2004-11-06 [FBD]
559NetBSD 2.0		2004-12-09 [NBD]
560FreeBSD 4.11		2005-01-25 [FBD]
561DragonFly 1.2.0		2005-04-08 [DFB]
562NetBSD 2.0.2		2005-04-14 [NBD] (security/critical release)
563Mac OS X 10.4		2005-04-29 [APL]
564FreeBSD 5.4		2005-05-09 [FBD]
565OpenBSD 3.7		2005-05-19 [OBD]
566NetBSD 2.0.3		2005-10-31 [NBD] (security/critical release)
567OpenBSD 3.8		2005-11-01 [OBD]
568FreeBSD 6.0		2005-11-01 [FBD]
569NetBSD 2.1		2005-11-02 [NBD]
570NetBSD 3.0		2005-12-23 [NBD]
571DragonFly 1.4.0		2006-01-08 [DFB]
572FreeBSD 2.2.9		2006-04-01 [FBD]
573OpenBSD 3.9		2006-05-01 [OBD]
574FreeBSD 6.1		2006-05-08 [FBD]
575FreeBSD 5.5		2006-05-25 [FBD]
576NetBSD 3.0.1		2006-07-24 [NBD] (security/critical release)
577DragonFly 1.6.0		2006-07-24 [DFB]
578OpenBSD 4.0		2006-11-01 [OBD]
579NetBSD 3.0.2		2006-11-04 [NBD] (security/critical release)
580NetBSD 3.1		2006-11-04 [NBD]
581FreeBSD 6.2		2007-01-15 [FBD]
582DragonFly 1.8.0		2007-01-30 [DFB]
583OpenBSD 4.1		2007-05-01 [OBD]
584DragonFly 1.10.0	2007-08-06 [DFB]
585Mac OS X 10.5		2007-10-26 [APL]
586OpenBSD 4.2		2007-11-01 [OBD]
587NetBSD 4.0		2007-12-19 [NBD]
588FreeBSD 6.3		2008-01-18 [FBD]
589DragonFly 1.12.0	2008-02-26 [DFB]
590FreeBSD 7.0		2008-02-27 [FBD]
591OpenBSD 4.3		2008-05-01 [OBD]
592DragonFly 2.0.0		2008-07-21 [DFB]
593OpenBSD 4.4		2008-11-01 [OBD]
594FreeBSD 6.4		2008-11-28 [FBD]
595FreeBSD 7.1		2009-01-04 [FBD]
596DragonFly 2.2.0		2009-02-17 [DFB]
597NetBSD 5.0		2009-04-29 [NBD]
598OpenBSD 4.5		2009-05-01 [OBD]
599FreeBSD 7.2		2009-05-04 [FBD]
600Mac OS X 10.6		2009-06-08 [APL]
601NetBSD 5.0.1		2009-08-02 [NBD] (security/critical release)
602DragonFly 2.4.0		2009-09-16 [DFB]
603OpenBSD 4.6		2009-10-18 [OBD]
604FreeBSD 8.0		2009-11-26 [FBD]
605NetBSD 5.0.2		2010-02-12 [NBD] (security/critical release)
606FreeBSD 7.3		2010-03-23 [FBD]
607DragonFly 2.6.0		2010-03-28 [DFB]
608OpenBSD 4.7		2010-05-19 [OBD]
609FreeBSD 8.1		2010-07-24 [FBD]
610DragonFly 2.8.2		2010-10-30 [DFB]
611OpenBSD 4.8		2010-11-01 [OBD]
612NetBSD 5.1		2010-11-19 [NBD]
613FreeBSD 7.4		2011-02-24 [FBD]
614FreeBSD 8.2		2011-02-24 [FBD]
615DragonFly 2.10.1	2011-04-26 [DFB]
616OpenBSD 4.9		2011-05-01 [OBD]
617Mac OS X 10.7		2011-07-20 [APL]
618OpenBSD 5.0		2011-11-01 [OBD]
619FreeBSD 9.0		2012-01-12 [FBD]
620NetBSD 5.1.2		2012-02-02 [NBD] (security/critical release)
621DragonFly 3.0.1		2012-02-21 [DFB]
622FreeBSD 8.3		2012-04-18 [FBD]
623OpenBSD 5.1		2012-05-01 [OBD]
624Mac OS X 10.8		2012-07-25 [APL]
625NetBSD 6.0		2012-10-17 [NBD]
626OpenBSD 5.2		2012-11-01 [OBD]
627DragonFly 3.2.1		2012-11-02 [DFB]
628NetBSD 5.2		2012-12-03 [NBD]
629NetBSD 6.0.1		2012-12-26 [NBD] (security/critical release)
630FreeBSD 9.1		2012-12-30 [FBD]
631DragonFly 3.4.1		2013-04-29 [DFB]
632OpenBSD 5.3		2013-05-01 [OBD]
633NetBSD 6.0.2		2013-05-18 [NBD] (security/critical release)
634NetBSD 6.1		2013-05-18 [NBD]
635FreeBSD 8.4		2013-06-07 [FBD]
636NetBSD 6.1.1		2013-08-22 [NBD]
637NetBSD 5.1.3		2013-09-29 [NBD]
638NetBSD 5.2.1		2013-09-29 [NBD]
639FreeBSD 9.2		2013-09-30 [FBD]
640NetBSD 6.0.3		2013-09-30 [NBD]
641NetBSD 6.1.2		2013-09-30 [NBD]
642Mac OS X 10.9		2013-10-22 [APL]
643OpenBSD 5.4		2013-11-01 [OBD]
644DragonFly 3.6.0 	2013-11-25 [DFB]
645FreeBSD 10.0		2014-01-20 [FBD]
646NetBSD 6.0.4		2014-01-27 [NBD]
647NetBSD 6.1.3		2014-01-27 [NBD]
648DragonFly 3.6.1 	2014-02-22 [DFB]
649DragonFly 3.6.2		2014-04-10 [DFB]
650NetBSD 6.0.5		2014-04-19 [NDB]
651NetBSD 6.1.4		2014-04-19 [NDB]
652OpenBSD 5.5		2014-05-01 [OBD]
653DragonFly 3.8.0		2014-06-04 [DFB]
654DragonFly 3.8.1		2014-06-16 [DFB]
655DragonFly 3.6.3		2014-06-17 [DFB]
656FreeBSD 9.3		2014-07-05 [FBD]
657DragonFly 3.8.2		2014-08-08 [DFB]
658NetBSD 6.1.5		2014-09-22 [NDB]
659Mac OS X 10.10		2014-10-16 [APL]
660OpenBSD 5.6		2014-11-01 [OBD]
661FreeBSD 10.1		2014-11-14 [FBD]
662DragonFly 4.0.1		2014-11-25 [DFB]
663
664Bibliography
665------------------------
666
667Leffler, Samuel J., Marshall Kirk McKusick, Michael J Karels and John
668Quarterman. The Design and Implementation of the 4.3BSD UNIX Operating
669System. Reading, Mass. Addison-Wesley, 1989. ISBN 0-201-06196-1
670
671Salus, Peter H. A quarter century of UNIX. Addison-Wesley Publishing
672Company, Inc., 1994. ISBN 0-201-54777-5
673
674McKusick, Marshall Kirk, Keith Bostic, Michael J Karels, and John
675Quarterman. The Design and Implementation of the 4.4BSD Operating
676System. Reading, Mass. Addison-Wesley, 1996. ISBN 0-201-54979-4
677
678McKusick, Marshall Kirk, George Neville-Neil. The Design and
679Implementation of the FreeBSD Operating System.
680Addison-Wesley Professional, Published: Aug 2, 2004. ISBN 0-201-70245-2
681
682Doug McIlroy. Research Unix Reader.
683
684Michael G. Brown. The Role of BSD in the Development of Unix.
685Presented to the Tasmanian Unix Special Interest Group of the
686Australian Computer Society, Hobart, August 1993.
687
688Peter H. Salus. Unix at 25. Byte Magazine, October 1994.
689URL: http://www.byte.com/art/9410/sec8/art3.htm
690
691Andreas Klemm, Lars Köller. If you're going to San Francisco ...
692Die freien BSD-Varianten von Unix. c't April 1997, page 368ff.
693
694BSD Release Announcements collection.
695URL: http://www.FreeBSD.org/releases/
696
697BSD Hypertext Man Pages
698URL: http://www.FreeBSD.org/cgi/man.cgi
699
700UNIX history graphing project
701URL: http://minnie.tuhs.org/Unix_History/index.html
702
703UNIX history
704URL: http://www.levenez.com/unix/
705
706James Howard: The BSD Family Tree
707URL: http://ezine.daemonnews.org/200104/bsd_family.html
708("what are the differences between FreeBSD, NetBSD, and OpenBSD?")
709
710
711Acknowledgments
712---------------
713
714Josh Gilliam for suggestions, bug fixes, and finding very old
715original BSD announcements from Usenet or tapes.
716
717Steven M. Schultz for providing 2.8BSD, 2.10BSD, 2.11BSD manual pages.
718
719--
720Copyright (c) 1997-2012 Wolfram Schneider <wosch@FreeBSD.ORG>
721URL: http://svnweb.freebsd.org/base/head/share/misc/bsd-family-tree
722
723$FreeBSD$
724