bsd-family-tree revision 1.38 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 | | 10.4 | | | | |
191 | FreeBSD 5.4 | | | | | |
192 | | | | | | OpenBSD 3.7 |
193 | | | | | NetBSD 2.0.3 | |
194 | | | | | | | |
195 *--FreeBSD | | | | v OpenBSD 3.8 |
196 | 6.0 | | | | | |
197 | | | | | \ | |
198 | | | | | NetBSD 2.1 | |
199 | | | | | | |
200 | | | | NetBSD 3.0 | |
201 | | | | | | | | DragonFly 1.4.0
202 | | | | | | | OpenBSD 3.9 |
203 | FreeBSD | | | | | | |
204 | 6.1 | | | | | | |
205 | | FreeBSD 5.5 | | | | | |
206 | | | | | NetBSD 3.0.1 | DragonFly 1.6.0
207 | | | | | | | |
208 | V | | | | OpenBSD 4.0 |
209 | | | | NetBSD 3.0.2 | |
210 | | | NetBSD 3.1 | |
211 | | | | |
212 FreeBSD 7 -current | NetBSD -current OpenBSD -current |
213 | | | | |
214 v v v v v
215
216 Time
217 ----------------
218
219 Time tolerance +/- 6 months, depending on which book/article you read; if it
220 was the announcement in Usenet or if it was available as tape.
221
222 [44B] McKusick, Marshall Kirk, Keith Bostic, Michael J Karels,
223 and John Quarterman. The Design and Implementation of
224 the 4.4BSD Operating System.
225 [APL] Apple website [http://www.apple.com/macosx/]
226 [BSDI] Berkeley Software Design, Inc.
227 [DFB] DragonFlyBSD Project, The.
228 [DOC] README, COPYRIGHT on tape.
229 [FBD] FreeBSD Project, The.
230 [KB] Keith Bostic. BSD2.10 available from Usenix. comp.unix.sources,
231 Volume 11, Info 4, April, 1987.
232 [KKK] Mike Karels, Kirk McKusick, and Keith Bostic. tahoe announcement.
233 comp.bugs.4bsd.ucb-fixes, June 15, 1988.
234 [KSJ] Michael J. Karels, Carl F. Smith, and William F. Jolitz.
235 Changes in the Kernel in 2.9BSD. Second Berkeley Software
236 Distribution UNIX Version 2.9, July, 1983.
237 [NBD] NetBSD Project, The.
238 [OBD] OpenBSD Project, The.
239 [QCU] Salus, Peter H. A quarter century of UNIX.
240 [SMS] Steven M. Schultz. 2.11BSD, UNIX for the PDP-11.
241 [USE] Usenet announcement.
242 [WRS] Wind River Systems, Inc.
243 [dmr] Dennis Ritchie, via E-Mail
244
245 Multics 1965
246 UNIX Summer 1969
247 DEC PDP-7
248 First Edition 1971-11-03 [QCU]
249 DEC PDP-11/20, Assembler
250 Second Edition 1972-06-12 [QCU]
251 10 UNIX installations
252 Third Edition 1973-02-xx [QCU]
253 Pipes, 16 installations
254 Fourth Edition 1973-11-xx [QCU]
255 rewriting in C effected,
256 above 30 installations
257 Fifth Edition 1974-06-xx [QCU]
258 above 50 installations
259 Sixth Edition 1975-05-xx [QCU]
260 port to DEC Vax
261 Seventh Edition 1979-01-xx [QCU]
262 first portable UNIX
263 Eighth Edition 1985-02-xx [QCU]
264 VAX 11/750, VAX 11/780 [dmr]
265 descended from 4.1c BSD [dmr]
266 descended from 4.1 BSD [44B]
267 scooping-out and replacement of the character-device
268 and networking part by the streams mechanism
269
270 Ninth Edition 1986-09-xx [QCU]
271 Tenth Edition 1989-10-xx [QCU]
272
273 1BSD late 1977
274 1978-03-09 [QCU]
275 PDP-11, Pascal, ex(1)
276 30 free copies of 1BSD sent out
277 35 tapes sold for 50 USD [QCU]
278 2BSD mid 1978 [QCU]
279 75 2BSD tapes shipped
280 2.7.9BSD ?? [SMS]
281 2.8BSD 1981-07-xx [KSJ]
282
283 2.8.1BSD 1982-01-xx [QCU]
284 set of performance improvements
285 2.9BSD 1983-07-xx [KSJ]
286 2.9.1BSD 1983-11-xx
287 2.9BSD-Seismo 1985-08-xx [SMS]
288 2.10BSD 1987-04-xx [KKK]
289 2.10.1BSD 1989-01-xx [SMS]
290 2.11BSD 1992-02-xx [SMS]
291 2.11BSD rev #430 1999-12-13 [SMS]
292
293 32V 1978-1[01]-xx [QCU]
294 3BSD late 1979 [QCU]
295 virtual memory, page replacement,
296 demand paging
297 4.0BSD 1980-10-xx
298 4.1BSD 1981-07-08 [DOC]
299 4.1aBSD 1982-04-xx
300 alpha release, 100 sites, networking [44B]
301 4.1bBSD internal release, fast filesystem [44B]
302 4.1cBSD late 1982
303 beta release, IPC [44B]
304 4.2BSD 1983-09-xx [QCU]
305 1983-08-03 [DOC]
306 4.3BSD 1986-06-xx [QCU]
307 1986-04-05 [KB], [DOC]
308 4.3BSD Tahoe 1988-06-15 [QCU], [DOC]
309 4.3BSD NET/1 1988-11-xx [QCU]
310 1989-01-01 [DOC]
311 4.3BSD Reno 1990-06-29 [QCU], [DOC]
312 4.3BSD NET/2 1991-06-28 [QCU], [DOC]
313
314 BSD/386 ALPHA 1991-12-xx [BSDI]
315 first code released to people outside BSDI
316 386BSD 0.0 1992-02-xx [DOC]
317 BSD/386 0.3.1 1992-04-xx [BSDI] first ext. beta; B customers
318 BSD/386 0.3.3 1992-06-xx [BSDI] first CDROM version
319 386BSD 0.1 1992-07-28 [DOC]
320 4.4BSD Alpha 1992-07-07
321 BSD/386 0.9.3 1992-10-xx [BSDI]
322 first external gamma; G customers
323 BSD/386 0.9.4 1992-12-xx [BSDI]
324 would have been 1.0 except for request
325 for preliminary injunction
326 BSD/386 1.0 1993-03-xx [BSDI]
327 injunction denied; first official release
328 NetBSD 0.8 1993-04-20 [NBD]
329 4.4BSD 1993-06-01 [USE]
330 NetBSD 0.9 1993-08-23 [NBD]
331 FreeBSD 1.0 1993-11-01 [FBD]
332 BSD/386 1.1 1994-02-xx [BSDI]
333 4.4BSD Lite 1994-03-01 [USE]
334 FreeBSD 1.1 1994-05-07 [FBD]
335 FreeBSD 1.1.5 1994-06-30 [FBD]
336 FreeBSD 1.1.5.1 1994-07-05 [FBD]
337 supersedes 1.1.5 5 days after release.
338 NetBSD 1.0 1994-10-26 [NBD]
339 386BSD 1.0 1994-11-12 [USE]
340 FreeBSD 2.0 1994-11-23 [FBD]
341 BSD/OS 2.0 1995-01-xx [BSDI] 4.4 lite based
342 FreeBSD 2.0.5 1995-06-10 [FBD]
343 BSD/OS 2.0.1 1995-06-xx [BSDI]
344 4.4BSD Lite Release 2 1995-06-xx [44B]
345 the true final distribution from the CSRG
346 FreeBSD 2.1.0 1995-11-19 [FBD]
347 NetBSD 1.1 1995-11-26 [NBD]
348 BSD/OS 2.1 1996-01-xx [BSDI]
349 FreeBSD 2.1.5 1996-07-14 [FBD]
350 NetBSD 1.2 1996-10-04 [NBD]
351 OpenBSD 2.0 1996-10-18 [OBD]
352 FreeBSD 2.1.6 1996-11-16 [FBD]
353 FreeBSD 2.1.6.1 1996-11-25 [FBD] (sendmail security release)
354 Rhapsody 1997-xx-xx
355 FreeBSD 2.1.7 1997-02-20 [FBD]
356 BSD/OS 3.0 1997-02-xx [BSDI] 4.4 lite2 based
357 FreeBSD 2.2.0 1997-03-16 [FBD]
358 FreeBSD 2.2.1 1997-03-25 [FBD]
359 FreeBSD 2.2.2 1997-05-16 [FBD]
360 NetBSD 1.2.1 1997-05-20 [NBD] (patch release)
361 OpenBSD 2.1 1997-06-01 [OBD]
362 FreeBSD 2.2.5 1997-10-22 [FBD]
363 OpenBSD 2.2 1997-12-01 [OBD]
364 NetBSD 1.3 1998-01-04 [NBD]
365 FreeBSD 2.2.6 1998-03-25 [FBD]
366 NetBSD 1.3.1 1998-03-09 [NBD] (patch release)
367 BSD/OS 3.1 1998-03-xx [BSDI]
368 OpenBSD 2.3 1998-05-19 [OBD]
369 NetBSD 1.3.2 1998-05-29 [NBD] (patch release)
370 FreeBSD 2.2.7 1998-07-22 [FBD]
371 BSD/OS 4.0 1998-08-xx [BSDI]
372 2-lock MP support, ELF executables
373 FreeBSD 3.0 1998-10-16 [FBD]
374 FreeBSD-3.0 is a snapshot from -current,
375 while 3.1 and 3.2 are from 3.x-stable which
376 was branched quite some time after 3.0-release
377 FreeBSD 2.2.8 1998-11-29 [FBD]
378 OpenBSD 2.4 1998-12-01 [OBD]
379 NetBSD 1.3.3 1998-12-23 [NBD] (patch release)
380 FreeBSD 3.1 1999-02-15 [FBD]
381 BSD/OS 4.0.1 1999-03-xx [BSDI]
382 NetBSD 1.4 1999-05-12 [NBD]
383 FreeBSD 3.2 1999-05-17 [FBD]
384 OpenBSD 2.5 1999-05-19 [OBD]
385 NetBSD 1.4.1 1999-08-26 [NBD] (patch release)
386 FreeBSD 3.3 1999-09-17 [FBD]
387 OpenBSD 2.6 1999-12-01 [OBD]
388 FreeBSD 3.4 1999-12-20 [FBD]
389 BSD/OS 4.1 1999-12-xx [BSDI]
390 FreeBSD 4.0 2000-03-13 [FBD]
391 NetBSD 1.4.2 2000-03-19 [NBD] (patch release)
392 OpenBSD 2.7 2000-06-15 [OBD]
393 FreeBSD 3.5 2000-06-24 [FBD]
394 FreeBSD 4.1 2000-07-27 [FBD]
395 FreeBSD 3.5.1 2000-07-28 [FBD]
396 FreeBSD 4.1.1 2000-09-25 [FBD] (a network-only patch release)
397 FreeBSD 4.2 2000-11-21 [FBD]
398 NetBSD 1.4.3 2000-11-25 [NBD] (patch release)
399 BSD/OS 4.2 2000-11-29 [BSDI]
400 OpenBSD 2.8 2000-12-01 [OBD]
401 NetBSD 1.5 2000-12-06 [NBD]
402 Mac OS X 10.0 2001-03-24 [APL]
403 FreeBSD 4.3 2001-04-20 [FBD]
404 OpenBSD 2.9 2001-06-01 [OBD]
405 NetBSD 1.5.1 2001-07-11 [NBD] (patch release)
406 NetBSD 1.5.2 2001-09-13 [NBD] (patch release)
407 FreeBSD 4.4 2001-09-18 [FBD]
408 Mac OS X 10.1 2001-09-29 [APL]
409 OpenBSD 3.0 2001-12-01 [OBD]
410 FreeBSD 4.5 2002-01-29 [FBD]
411 BSD/OS 4.3 2002-03-14 [WRS]
412 OpenBSD 3.1 2002-05-19 [OBD]
413 FreeBSD 4.6 2002-06-15 [FBD]
414 NetBSD 1.5.3 2002-07-22 [NBD] (patch release)
415 FreeBSD 4.6.2 2002-08-15 [FBD] (patch release)
416 Mac OS X 10.2 2002-08-23 [APL]
417 NetBSD 1.6 2002-09-14 [NBD]
418 FreeBSD 4.7 2002-10-08 [FBD]
419 OpenBSD 3.2 2002-11-01 [OBD]
420 FreeBSD 5.0 2003-01-17 [FBD]
421 FreeBSD 5.0 is a separate branch off of
422 -current, similar to 3.0.
423 FreeBSD 4.8 2003-04-03 [FBD]
424 NetBSD 1.6.1 2003-04-21 [NBD] (patch release)
425 OpenBSD 3.3 2003-05-01 [OBD]
426 BSD/OS 5.0 2003-05-?? [WRS]
427 FreeBSD 5.1 2003-06-09 [FBD]
428 Mac OS X 10.3 2003-10-24 [APL]
429 FreeBSD 4.9 2003-10-28 [FBD]
430 BSD/OS 5.1 ISE 2003-10-?? [WRS] (final version)
431 OpenBSD 3.4 2003-11-01 [OBD]
432 FreeBSD 5.2 2004-01-12 [FBD]
433 FreeBSD 5.2.1 2004-02-22 [FBD] (patch release)
434 NetBSD 1.6.2 2004-03-01 [NBD] (patch release)
435 OpenBSD 3.5 2004-04-01 [OBD]
436 FreeBSD 4.10 2004-05-27 [FBD]
437 DragonFly 1.0 2004-07-12 [DFB]
438 OpenBSD 3.6 2004-10-29 [OBD]
439 FreeBSD 5.3 2004-11-06 [FBD]
440 NetBSD 2.0 2004-12-09 [NBD]
441 FreeBSD 4.11 2005-01-25 [FBD]
442 DragonFly 1.2.0 2005-04-08 [DFB]
443 NetBSD 2.0.2 2005-04-14 [NBD] (security/critical release)
444 Mac OS X 10.4 2005-04-29 [APL]
445 FreeBSD 5.4 2005-05-09 [FBD]
446 OpenBSD 3.7 2005-05-19 [OBD]
447 NetBSD 2.0.3 2005-10-31 [NBD] (security/critical release)
448 OpenBSD 3.8 2005-11-01 [OBD]
449 FreeBSD 6.0 2005-11-01 [FBD]
450 NetBSD 2.1 2005-11-02 [NBD]
451 NetBSD 3.0 2005-12-23 [NBD]
452 DragonFly 1.4.0 2006-01-08 [DFB]
453 OpenBSD 3.9 2006-05-01 [OBD]
454 FreeBSD 6.1 2006-05-08 [FBD]
455 FreeBSD 5.5 2006-05-25 [FBD]
456 NetBSD 3.0.1 2006-07-24 [NBD] (security/critical release)
457 DragonFly 1.6.0 2006-07-24 [DFB]
458 OpenBSD 4.0 2006-11-01 [OBD]
459 NetBSD 3.0.2 2006-11-04 [NBD] (security/critical release)
460 NetBSD 3.1 2006-11-04 [NBD]
461
462 Bibliography
463 ------------------------
464
465 Leffler, Samuel J., Marshall Kirk McKusick, Michael J Karels and John
466 Quarterman. The Design and Implementation of the 4.3BSD UNIX Operating
467 System. Reading, Mass. Addison-Wesley, 1989. ISBN 0-201-06196-1
468
469 Salus, Peter H. A quarter century of UNIX. Addison-Wesley Publishing
470 Company, Inc., 1994. ISBN 0-201-54777-5
471
472 McKusick, Marshall Kirk, Keith Bostic, Michael J Karels, and John
473 Quarterman. The Design and Implementation of the 4.4BSD Operating
474 System. Reading, Mass. Addison-Wesley, 1996. ISBN 0-201-54979-4
475
476 McKusick, Marshall Kirk, George Neville-Neil. The Design and
477 Implementation of the FreeBSD Operating System.
478 Addison-Wesley Professional, Published: Aug 2, 2004. ISBN 0-201-70245-2
479
480 Doug McIlroy. Research Unix Reader.
481
482 Michael G. Brown. The Role of BSD in the Development of Unix.
483 Presented to the Tasmanian Unix Special Interest Group of the
484 Australian Computer Society, Hobart, August 1993.
485
486 Peter H. Salus. Unix at 25. Byte Magazine, October 1994.
487 URL: http://www.byte.com/art/9410/sec8/art3.htm
488
489 Andreas Klemm, Lars Kller. If you're going to San Francisco ...
490 Die freien BSD-Varianten von Unix. c't April 1997, page 368ff.
491
492 BSD Release Announcements collection.
493 URL: http://www.de.FreeBSD.org/de/ftp/releases/
494
495 BSD Hypertext Man Pages
496 URL: http://www.FreeBSD.org/cgi/man.cgi
497
498 UNIX history graphing project
499 URL: http://minnie.tuhs.org/Unix_History/index.html
500
501 UNIX history
502 URL: http://www.levenez.com/unix/
503
504 James Howard: The BSD Family Tree
505 URL: http://ezine.daemonnews.org/200104/bsd_family.html
506 ("what are the differences between FreeBSD, NetBSD, and OpenBSD?")
507
508
509 Acknowledgments
510 ---------------
511
512 Josh Gilliam for suggestions, bug fixes, and finding very old
513 original BSD announcements from Usenet or tapes.
514
515 Steven M. Schultz for providing 2.8BSD, 2.10BSD, 2.11BSD manual pages.
516
517 --
518 Copyright (c) 1997-2004 Wolfram Schneider <wosch (a] FreeBSD.ORG>
519 URL: http://cvsweb.freebsd.org/src/share/misc/bsd-family-tree
520
521 $FreeBSD: src/share/misc/bsd-family-tree,v 1.109 2006/11/05 15:56:45 maxim Exp $
522