Synchronize with FreeBSD.
[dragonfly.git] / share / misc / bsd-family-tree
1 The UNIX system family tree: Research and BSD
2 ---------------------------------------------
3
4 First Edition (V1)
5      |
6 Second Edition (V2)
7      |
8 Third Edition (V3)
9      |
10 Fourth Edition (V4)
11      |
12 Fifth Edition (V5)
13      |
14 Sixth Edition (V6) -----*
15        \                |
16         \               |
17          \              |
18 Seventh Edition (V7)    |
19             \           |
20              \        1BSD
21              32V        |
22                \      2BSD---------------*
23                 \    /                   |
24                  \  /                    |
25                   \/                     |
26                  3BSD                    |
27                   |                      |
28                4.0BSD               2.7.9BSD
29                   |                      |
30                4.1BSD --------------> 2.8BSD
31                   |                      |
32               4.1aBSD -----------\       |
33                   |                \     |
34               4.1bBSD                \   |
35                   |                    \ |
36       *------ 4.1cBSD --------------> 2.9BSD
37      /            |                      |
38 Eighth Edition    |                   2.9BSD-Seismo
39      |            |                      |
40      +----<--- 4.2BSD               2.9.1BSD
41      |            |                      |
42      +----<--- 4.3BSD -------------> 2.10BSD
43      |            |               /      |
44 Ninth Edition     |              / 2.10.1BSD
45      |         4.3BSD Tahoe-----+        |
46      |            |              \       |
47      |            |                \     |
48      v            |                  2.11BSD
49 Tenth Edition     |                      |
50                   |                  2.11BSD rev #430
51                4.3BSD NET/1              |
52                   |                      v
53                4.3BSD Reno
54                   |
55    *---------- 4.3BSD NET/2 -------------------+-------------*
56    |                    |                      |             |
57 386BSD 0.0              |                      |           BSD/386 ALPHA
58    |                    |                      |             |
59 386BSD 0.1 ------------>+                      |           BSD/386 0.3.[13]
60    |     \              |                  4.4BSD Alpha      |
61    |     386BSD 1.0     |                      |           BSD/386 0.9.[34]
62    |                    |                  4.4BSD            |
63    |                    |                    / |             |
64    |                    |   4.4BSD-Encumbered  |             |
65    |                 NetBSD 0.8                |           BSD/386 1.0
66    |                    |                      |             |
67 FreeBSD 1.0          NetBSD 0.9                |           BSD/386 1.1
68    |                    |           .----- 4.4BSD Lite       |
69 FreeBSD 1.1             |          /   /       |     \       |
70    |                    |         /   /        |      \      |
71 FreeBSD 1.1.5       .---|--------'   /         |       \     |
72    |               /    |           /          |        \    |
73 FreeBSD 1.1.5.1   /     |          /           |         \   |
74    |             /   NetBSD 1.0 <-'            |          \  |
75    |            /       |                      |           \ |
76 FreeBSD 2.0 <--'        |                      |           BSD/OS 2.0
77    |                     \                     |             |
78 FreeBSD 2.0.5             \                    |           BSD/OS 2.0.1
79    |                 .-----\------------- 4.4BSD Lite2       |
80    |                 |      \             |  |   |   |       |
81    |                 | .-----|------Rhapsody |   |   |       |
82    |                 | |     |        NetBSD 1.3 |   |       |
83    |                 | |     |           OpenBSD 2.3 |       |
84    |                 | |     |                BSD/OS 3.0     |
85 FreeBSD 2.1          | |     |                               |
86  |   |               | |  NetBSD 1.1 ------.               BSD/OS 2.1
87  | FreeBSD 2.1.5     | |     |              \                |
88  |     |             | |  NetBSD 1.2         \             BSD/OS 3.0
89  | FreeBSD 2.1.6     | |     |  \          OpenBSD 2.0       |
90  |     |             | |     |   \             |             |
91  | FreeBSD 2.1.6.1   | |     |    \            |             |
92  |     |             | |     |     \           |             |
93  | FreeBSD 2.1.7     | |     |      |          |             |
94  |     |             | |     |  NetBSD 1.2.1   |             |
95  | FreeBSD 2.1.7.1   | |     |                 |             |
96  |                   | |     |                 |             |
97  |                   | |     |                 |             |
98  *-FreeBSD 2.2       | |     |                 |             |
99  |        \          | |     |                 |             |
100  |     FreeBSD 2.2.1 | |     |                 |             |
101  |         |         | |     |                 |             |
102  |     FreeBSD 2.2.2 | |     |             OpenBSD 2.1       |
103  |         |         | |     |                 |             |
104  |     FreeBSD 2.2.5 | |     |                 |             |
105  |         |         | |     |             OpenBSD 2.2       |
106  |         |         | |  NetBSD 1.3           |             |
107  |     FreeBSD 2.2.6 | |     |    |            |             |
108  |         |         | |     | NetBSD 1.3.1    |           BSD/OS 3.1
109  |         |         | |     |    |        OpenBSD 2.3       |
110  |         |         | |     | NetBSD 1.3.2    |             |
111  |     FreeBSD 2.2.7 | |     |    |            |             |
112  |         |         | |     |    |            |           BSD/OS 4.0
113  |         v         | |     |    |            |             |
114  |     FreeBSD 2.2.8 | |     |    |            |             |
115  |                   | |     |    |        OpenBSD 2.4       |
116 FreeBSD 3.0 <--------* |     |    v            |             |
117  |                     |     | NetBSD 1.3.3    |             |
118  *---FreeBSD 3.1       |     |                 |             |
119  |       |             |     |                 |           BSD/OS 4.0.1
120  |   FreeBSD 3.2----*  |  NetBSD 1.4       OpenBSD 2.5       |
121  |       |          |  |  |  |    |            |             |
122  |       |          |  |  |  |    |            |             |
123  |       |          |  |  |  |    |            |             |
124  |   FreeBSD 3.3    |  |  |  | NetBSD 1.4.1    |             |
125  |       |          |  |  |  |    |        OpenBSD 2.6       |
126  |   FreeBSD 3.4    |  |  |  |    |            |             |
127  |           |      |  |  |  |    |            |           BSD/OS 4.1
128 FreeBSD 4.0  |      |  |  |  | NetBSD 1.4.2    |             |
129  |           |      |  |  |  |    |            |             |
130  |           |      |  |  |  |    |            |             |
131  |   FreeBSD 3.5    |  |  |  |    |        OpenBSD 2.7       |
132  |           |      |  |  |  |    |            |             |
133  |   FreeBSD 3.5.1  |  |  |  |    |            |             |
134  |                  |  |  |  |    |            |             |
135  *---FreeBSD 4.1    |  |  |  |    |            |             |
136  |      |           |  | (?) |    |            |             |
137  |   FreeBSD 4.1.1  |  |  /  |    |            |             |
138  |      |           |  | /   |    |            |             |
139  |   FreeBSD 4.2   Darwin/   | NetBSD 1.4.3    |             |
140  |      |         Mac OS X   |             OpenBSD 2.8     BSD/OS 4.2
141  |      |             |      |                 |             |
142  |      |             |      |                 |             |
143  |      |           10.0  NetBSD 1.5           |             |
144  |   FreeBSD 4.3      |      |    |            |             |
145  |      |             |      |    |        OpenBSD 2.9       |
146  |      |             |      | NetBSD 1.5.1    |             |
147  |      |             |      |    |            |             |
148  |   FreeBSD 4.4-.    |      | NetBSD 1.5.2    |             |
149  |      |        | Mac OS X  |    |            |             |
150  |      |        |   10.1    |    |        OpenBSD 3.0       |
151  |   FreeBSD 4.5 |    |      |    |            |             |
152  |      |         \   |      |    |            |           BSD/OS 4.3
153  |   FreeBSD 4.6   \  |      |    |        OpenBSD 3.1       |
154  |      |           \ |      | NetBSD 1.5.3    |             |
155  |   FreeBSD 4.6.2 Mac OS X  |                 |             |
156  |      |            10.2    |                 |             |
157  |   FreeBSD 4.7      |      |                 |             |
158  |      |             |   NetBSD 1.6       OpenBSD 3.2       |
159  |   FreeBSD 4.8      |      |    |            |             |
160  |      |             |      | NetBSD 1.6.1    |             |
161  |      |--------.    |      |    |        OpenBSD 3.3     BSD/OS 5.0
162  |      |         \   |      |    |            |             |
163  |   FreeBSD 4.9   |  |      |    |        OpenBSD 3.4     BSD/OS 5.1 ISE
164  |      |          |  |      |    |            |
165  |      |          |  |      | NetBSD 1.6.2    |
166  |      |          |  |      |    |            |
167  |      |          |  |      |    |        OpenBSD 3.5
168  |      |          |  |      |    v            |
169  |   FreeBSD 4.10  |  |      |                 |
170  |      |          |  |      |                 |
171  |   FreeBSD 4.11  |  |      |                 |
172  |      |          |  |      |                 |
173  |      v           `-|------|-----------------|---------------------.
174  |                    |      |                 |                      \
175 FreeBSD 5.0           |      |                 |                       |
176  |                    |      |                 |                       |
177 FreeBSD 5.1           |      |                 |                  DragonFly 1.0
178  |          \         |      |                 |                       |
179  |           ----- Mac OS X  |                 |                       |
180  |                   10.3    |                 |                       |
181 FreeBSD 5.2           |      |                 |                       |
182  |      |             |      |                 |                       |
183  |   FreeBSD 5.2.1    |      |                 |                       |
184  |                    |      |                 |                       |
185  *---FreeBSD 5.3      |      |                 |                       |
186  |      |             |      |             OpenBSD 3.6                 |
187  |      |             |   NetBSD 2.0           |                       |
188  |      |             |      |    |            |                 DragonFly 1.2.0
189  |      |          Mac OS X  | NetBSD 2.0.2    |                       |
190  |   FreeBSD 5.4     10.4    |    |            |                       |
191  |      |             |      |    |        OpenBSD 3.7                 |
192  |      V             |      |    v            |                       |
193  |                    |      |                 |                       |
194 FreeBSD 6 -current    |  NetBSD -current  OpenBSD -current             |
195  |                    |      |                 |                       |
196  v                    v      v                 v                       v
197
198 Time
199 ----------------
200
201 Time tolerance +/- 6 months, depending on which book/article you read; if it
202 was the announcement in Usenet or if it was available as tape.
203
204 [44B] McKusick, Marshall Kirk, Keith Bostic, Michael J Karels,
205         and John Quarterman. The Design and Implementation of
206         the 4.4BSD Operating System.
207 [APL] Apple website [http://www.apple.com/macosx/]
208 [BSDI] Berkeley Software Design, Inc.
209 [DFB] DragonFlyBSD Project, The.
210 [DOC] README, COPYRIGHT on tape.
211 [FBD] FreeBSD Project, The.
212 [KB]  Keith Bostic. BSD2.10 available from Usenix. comp.unix.sources,
213         Volume 11, Info 4, April, 1987.
214 [KKK] Mike Karels, Kirk McKusick, and Keith Bostic. tahoe announcement.
215         comp.bugs.4bsd.ucb-fixes, June 15, 1988.
216 [KSJ] Michael J. Karels, Carl F. Smith, and William F. Jolitz.
217         Changes in the Kernel in 2.9BSD. Second Berkeley Software
218         Distribution UNIX Version 2.9, July, 1983.
219 [NBD] NetBSD Project, The.
220 [OBD] OpenBSD Project, The.
221 [QCU] Salus, Peter H. A quarter century of UNIX.
222 [SMS] Steven M. Schultz. 2.11BSD, UNIX for the PDP-11.
223 [USE] Usenet announcement.
224 [WRS] Wind River Systems, Inc.
225 [dmr] Dennis Ritchie, via E-Mail
226
227 Multics                 1965
228 UNIX                    Summer 1969
229                                 DEC PDP-7
230 First   Edition         1971-11-03 [QCU]
231                                 DEC PDP-11/20, Assembler
232 Second  Edition         1972-06-12 [QCU]
233                                 10 UNIX installations
234 Third   Edition         1973-02-xx [QCU]
235                                 Pipes, 16 installations
236 Fourth  Edition         1973-11-xx [QCU]
237                                 rewriting in C effected,
238                                 above 30 installations
239 Fifth   Edition         1974-06-xx [QCU]
240                                 above 50 installations
241 Sixth   Edition         1975-05-xx [QCU]
242                                 port to DEC Vax
243 Seventh Edition         1979-01-xx [QCU]
244                                 first portable UNIX
245 Eighth  Edition         1985-02-xx [QCU]
246                                 VAX 11/750, VAX 11/780 [dmr]
247                                 descended from 4.1c BSD [dmr]
248                                 descended from 4.1 BSD [44B]
249                         scooping-out and replacement of the character-device
250                         and networking part by the streams mechanism
251
252 Ninth   Edition         1986-09-xx [QCU]
253 Tenth   Edition         1989-10-xx [QCU]
254
255 1BSD                    late 1977
256                         1978-03-09 [QCU]
257                                 PDP-11, Pascal, ex(1)
258                                 30 free copies of 1BSD sent out
259                                 35 tapes sold for 50 USD [QCU]
260 2BSD                    mid 1978 [QCU]
261                                 75 2BSD tapes shipped
262 2.7.9BSD                ?? [SMS]
263 2.8BSD                  1981-07-xx [KSJ]
264
265 2.8.1BSD                1982-01-xx [QCU]
266                                 set of performance improvements
267 2.9BSD                  1983-07-xx [KSJ]
268 2.9.1BSD                1983-11-xx
269 2.9BSD-Seismo           1985-08-xx [SMS]
270 2.10BSD                 1987-04-xx [KKK]
271 2.10.1BSD               1989-01-xx [SMS]
272 2.11BSD                 1992-02-xx [SMS]
273 2.11BSD rev #430        1999-12-13 [SMS]
274
275 32V                     1978-1[01]-xx [QCU]
276 3BSD                    late 1979 [QCU]
277                                 virtual memory, page replacement,
278                                 demand paging
279 4.0BSD                  1980-10-xx
280 4.1BSD                  1981-07-08 [DOC]
281 4.1aBSD                 1982-04-xx
282                                 alpha release, 100 sites, networking [44B]
283 4.1bBSD                         internal release, fast filesystem [44B]
284 4.1cBSD                 late 1982
285                                 beta release, IPC [44B]
286 4.2BSD                  1983-09-xx [QCU]
287                         1983-08-03 [DOC]
288 4.3BSD                  1986-06-xx [QCU]
289                         1986-04-05 [KB], [DOC]
290 4.3BSD Tahoe            1988-06-15 [QCU], [DOC]
291 4.3BSD NET/1            1988-11-xx [QCU]
292                         1989-01-01 [DOC]
293 4.3BSD Reno             1990-06-29 [QCU], [DOC]
294 4.3BSD NET/2            1991-06-28 [QCU], [DOC]
295
296 BSD/386 ALPHA           1991-12-xx [BSDI]
297                                 first code released to people outside BSDI
298 386BSD 0.0              1992-02-xx [DOC]
299 BSD/386 0.3.1           1992-04-xx [BSDI] first ext. beta; B customers
300 BSD/386 0.3.3           1992-06-xx [BSDI] first CDROM version
301 386BSD 0.1              1992-07-28 [DOC]
302 4.4BSD Alpha            1992-07-07
303 BSD/386 0.9.3           1992-10-xx [BSDI]
304                                 first external gamma; G customers
305 BSD/386 0.9.4           1992-12-xx [BSDI]
306                                 would have been 1.0 except for request
307                                 for preliminary injunction
308 BSD/386 1.0             1993-03-xx [BSDI]
309                                 injunction denied; first official release
310 NetBSD 0.8              1993-04-20 [NBD]
311 4.4BSD                  1993-06-01 [USE]
312 NetBSD 0.9              1993-08-23 [NBD]
313 FreeBSD 1.0             1993-11-01 [FBD]
314 BSD/386 1.1             1994-02-xx [BSDI]
315 4.4BSD Lite             1994-03-01 [USE]
316 FreeBSD 1.1             1994-05-07 [FBD]
317 FreeBSD 1.1.5           1994-06-30 [FBD]
318 FreeBSD 1.1.5.1         1994-07-05 [FBD]
319                                 supersedes 1.1.5 5 days after release.
320 NetBSD 1.0              1994-10-26 [NBD]
321 386BSD 1.0              1994-11-12 [USE]
322 FreeBSD 2.0             1994-11-23 [FBD]
323 BSD/OS 2.0              1995-01-xx [BSDI] 4.4 lite based
324 FreeBSD 2.0.5           1995-06-10 [FBD]
325 BSD/OS 2.0.1            1995-06-xx [BSDI]
326 4.4BSD Lite Release 2   1995-06-xx [44B]
327                                 the true final distribution from the CSRG
328 FreeBSD 2.1.0           1995-11-19 [FBD]
329 NetBSD 1.1              1995-11-26 [NBD]
330 BSD/OS 2.1              1996-01-xx [BSDI]
331 FreeBSD 2.1.5           1996-07-14 [FBD]
332 NetBSD 1.2              1996-10-04 [NBD]
333 OpenBSD 2.0             1996-10-18 [OBD]
334 FreeBSD 2.1.6           1996-11-16 [FBD]
335 FreeBSD 2.1.6.1         1996-11-25 [FBD] (sendmail security release)
336 Rhapsody                1997-xx-xx
337 FreeBSD 2.1.7           1997-02-20 [FBD]
338 BSD/OS 3.0              1997-02-xx [BSDI] 4.4 lite2 based
339 FreeBSD 2.2.0           1997-03-16 [FBD]
340 FreeBSD 2.2.1           1997-03-25 [FBD]
341 FreeBSD 2.2.2           1997-05-16 [FBD]
342 NetBSD 1.2.1            1997-05-20 [NBD] (patch release)
343 OpenBSD 2.1             1997-06-01 [OBD]
344 FreeBSD 2.2.5           1997-10-22 [FBD]
345 OpenBSD 2.2             1997-12-01 [OBD]
346 NetBSD 1.3              1998-01-04 [NBD]
347 FreeBSD 2.2.6           1998-03-25 [FBD]
348 NetBSD 1.3.1            1998-03-09 [NBD] (patch release)
349 BSD/OS 3.1              1998-03-xx [BSDI]
350 OpenBSD 2.3             1998-05-19 [OBD]
351 NetBSD 1.3.2            1998-05-29 [NBD] (patch release)
352 FreeBSD 2.2.7           1998-07-22 [FBD]
353 BSD/OS 4.0              1998-08-xx [BSDI]
354                                 2-lock MP support, ELF executables
355 FreeBSD 3.0             1998-10-16 [FBD]
356                                 FreeBSD-3.0 is a snapshot from -current,
357                                 while 3.1 and 3.2 are from 3.x-stable which
358                                 was branched quite some time after 3.0-release
359 FreeBSD 2.2.8           1998-11-29 [FBD]
360 OpenBSD 2.4             1998-12-01 [OBD]
361 NetBSD 1.3.3            1998-12-23 [NBD] (patch release)
362 FreeBSD 3.1             1999-02-15 [FBD]
363 BSD/OS 4.0.1            1999-03-xx [BSDI]
364 NetBSD 1.4              1999-05-12 [NBD]
365 FreeBSD 3.2             1999-05-17 [FBD]
366 OpenBSD 2.5             1999-05-19 [OBD]
367 NetBSD 1.4.1            1999-08-26 [NBD] (patch release)
368 FreeBSD 3.3             1999-09-17 [FBD]
369 OpenBSD 2.6             1999-12-01 [OBD]
370 FreeBSD 3.4             1999-12-20 [FBD]
371 BSD/OS 4.1              1999-12-xx [BSDI]
372 FreeBSD 4.0             2000-03-13 [FBD]
373 NetBSD 1.4.2            2000-03-19 [NBD] (patch release)
374 OpenBSD 2.7             2000-06-15 [OBD]
375 FreeBSD 3.5             2000-06-24 [FBD]
376 FreeBSD 4.1             2000-07-27 [FBD]
377 FreeBSD 3.5.1           2000-07-28 [FBD]
378 FreeBSD 4.1.1           2000-09-25 [FBD] (a network-only patch release)
379 FreeBSD 4.2             2000-11-21 [FBD]
380 NetBSD 1.4.3            2000-11-25 [NBD] (patch release)
381 BSD/OS 4.2              2000-11-29 [BSDI]
382 OpenBSD 2.8             2000-12-01 [OBD]
383 NetBSD 1.5              2000-12-06 [NBD]
384 Mac OS X 10.0           2001-03-24 [APL]
385 FreeBSD 4.3             2001-04-20 [FBD]
386 OpenBSD 2.9             2001-06-01 [OBD]
387 NetBSD 1.5.1            2001-07-11 [NBD] (patch release)
388 NetBSD 1.5.2            2001-09-13 [NBD] (patch release)
389 FreeBSD 4.4             2001-09-18 [FBD]
390 Mac OS X 10.1           2001-09-29 [APL]
391 OpenBSD 3.0             2001-12-01 [OBD]
392 FreeBSD 4.5             2002-01-29 [FBD]
393 BSD/OS 4.3              2002-03-14 [WRS]
394 OpenBSD 3.1             2002-05-19 [OBD]
395 FreeBSD 4.6             2002-06-15 [FBD]
396 NetBSD 1.5.3            2002-07-22 [NBD] (patch release)
397 FreeBSD 4.6.2           2002-08-15 [FBD] (patch release)
398 Mac OS X 10.2           2002-08-23 [APL]
399 NetBSD 1.6              2002-09-14 [NBD]
400 FreeBSD 4.7             2002-10-08 [FBD]
401 OpenBSD 3.2             2002-11-01 [OBD]
402 FreeBSD 5.0             2003-01-17 [FBD]
403                                 FreeBSD 5.0 is a separate branch off of
404                                 -current, similar to 3.0.
405 FreeBSD 4.8             2003-04-03 [FBD]
406 NetBSD 1.6.1            2003-04-21 [NBD] (patch release)
407 OpenBSD 3.3             2003-05-01 [OBD]
408 BSD/OS 5.0              2003-05-?? [WRS]
409 FreeBSD 5.1             2003-06-09 [FBD]
410 Mac OS X 10.3           2003-10-24 [APL]
411 FreeBSD 4.9             2003-10-28 [FBD]
412 BSD/OS 5.1 ISE          2003-10-?? [WRS] (final version)
413 OpenBSD 3.4             2003-11-01 [OBD]
414 FreeBSD 5.2             2004-01-12 [FBD]
415 FreeBSD 5.2.1           2004-02-22 [FBD] (patch release)
416 NetBSD 1.6.2            2004-03-01 [NBD] (patch release)
417 OpenBSD 3.5             2004-04-01 [OBD]
418 FreeBSD 4.10            2004-05-27 [FBD]
419 DragonFly 1.0           2004-07-12 [DFB]
420 OpenBSD 3.6             2004-10-29 [OBD]
421 FreeBSD 5.3             2004-11-06 [FBD]
422 NetBSD 2.0              2004-12-09 [NBD]
423 FreeBSD 4.11            2005-01-25 [FBD]
424 DragonFly 1.2.0         2005-04-08 [DFB]
425 NetBSD 2.0.2            2005-04-14 [NBD] (security/critical release)
426 Mac OS X 10.4           2005-04-29 [APL]
427 FreeBSD 5.4             2005-05-09 [FBD]
428 OpenBSD 3.7             2005-05-19 [OBD]
429
430 Bibliography
431 ------------------------
432
433 Leffler, Samuel J., Marshall Kirk McKusick, Michael J Karels and John
434 Quarterman. The Design and Implementation of the 4.3BSD UNIX Operating
435 System. Reading, Mass. Addison-Wesley, 1989. ISBN 0-201-06196-1
436
437 Salus, Peter H. A quarter century of UNIX. Addison-Wesley Publishing
438 Company, Inc., 1994. ISBN 0-201-54777-5
439
440 McKusick, Marshall Kirk, Keith Bostic, Michael J Karels, and John
441 Quarterman. The Design and Implementation of the 4.4BSD Operating
442 System. Reading, Mass. Addison-Wesley, 1996. ISBN 0-201-54979-4
443
444 McKusick, Marshall Kirk, George Neville-Neil. The Design and
445 Implementation of the FreeBSD Operating System.
446 Addison-Wesley Professional, Published: Aug 2, 2004. ISBN 0-201-70245-2
447
448 Doug McIlroy. Research Unix Reader.
449
450 Michael G. Brown. The Role of BSD in the Development of Unix.
451 Presented to the Tasmanian Unix Special Interest Group of the
452 Australian Computer Society, Hobart, August 1993.
453
454 Peter H. Salus. Unix at 25. Byte Magazine, October 1994.
455 URL: http://www.byte.com/art/9410/sec8/art3.htm
456
457 Andreas Klemm, Lars K├Âller. If you're going to San Francisco ...
458 Die freien BSD-Varianten von Unix. c't April 1997, page 368ff.
459
460 BSD Release Announcements collection.
461 URL: http://www.de.FreeBSD.org/de/ftp/releases/
462
463 BSD Hypertext Man Pages
464 URL: http://www.FreeBSD.org/cgi/man.cgi
465
466 UNIX history graphing project
467 URL: http://minnie.tuhs.org/Unix_History/index.html
468
469 UNIX history
470 URL: http://www.levenez.com/unix/
471
472 James Howard: The BSD Family Tree
473 URL: http://www.daemonnews.org/200104/bsd_family.html
474 ("what are the differences between FreeBSD, NetBSD, and OpenBSD?")
475
476
477 Acknowledgments
478 ---------------
479
480 Josh Gilliam for suggestions, bug fixes, and finding very old
481 original BSD announcements from Usenet or tapes.
482
483 Steven M. Schultz for providing 2.8BSD, 2.10BSD, 2.11BSD manual pages.
484
485 --
486 Copyright (c) 1997-2004 Wolfram Schneider <wosch@FreeBSD.ORG>
487 URL: http://cvsweb.freebsd.org/src/share/misc/bsd-family-tree
488
489 $FreeBSD: src/share/misc/bsd-family-tree,v 1.95 2005/06/25 07:07:50 hrs Exp $
490 $DragonFly: src/share/misc/bsd-family-tree,v 1.6 2005/09/08 07:06:12 swildner Exp $