1 The UNIX system family tree: Research and BSD
2 ---------------------------------------------
14 Sixth Edition (V6) -----*
18 Seventh Edition (V7) |
22 \ 2BSD---------------*
30 4.1BSD --------------> 2.8BSD
32 4.1aBSD -----------\ |
36 *------ 4.1cBSD --------------> 2.9BSD
38 Eighth Edition | 2.9BSD-Seismo
40 +----<--- 4.2BSD 2.9.1BSD
42 +----<--- 4.3BSD -------------> 2.10BSD
44 Ninth Edition | / 2.10.1BSD
45 | 4.3BSD Tahoe-----+ |
55 *---------- 4.3BSD NET/2 -------------------+-------------*
57 386BSD 0.0 | | BSD/386 ALPHA
59 386BSD 0.1 ------------>+ | BSD/386 0.3.[13]
61 | 386BSD 1.0 | | BSD/386 0.9.[34]
64 | | 4.4BSD-Encumbered | |
65 | NetBSD 0.8 | BSD/386 1.0
67 FreeBSD 1.0 NetBSD 0.9 | BSD/386 1.1
68 | | .----- 4.4BSD Lite |
69 FreeBSD 1.1 | / / | \ |
71 FreeBSD 1.1.5 .---|--------' / | \ |
73 FreeBSD 1.1.5.1 / | / | \ |
74 | / NetBSD 1.0 <-' | \ |
76 FreeBSD 2.0 <--' | | BSD/OS 2.0
78 FreeBSD 2.0.5 \ | BSD/OS 2.0.1
79 | .-----\------------- 4.4BSD Lite2 |
81 | | .-----|------Rhapsody | | | |
82 | | | | NetBSD 1.3 | | |
83 | | | | OpenBSD 2.3 | |
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 |
91 | FreeBSD 2.1.6.1 | | | \ | |
93 | FreeBSD 2.1.7 | | | | | |
94 | | | | | NetBSD 1.2.1 | |
95 | FreeBSD 2.1.7.1 | | | | |
98 *-FreeBSD 2.2 | | | | |
100 | FreeBSD 2.2.1 | | | | |
102 | FreeBSD 2.2.2 | | | OpenBSD 2.1 |
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
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 |
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 | |
131 | FreeBSD 3.5 | | | | | OpenBSD 2.7 |
133 | FreeBSD 3.5.1 | | | | | | |
135 *---FreeBSD 4.1 | | | | | | |
137 | FreeBSD 4.1.1 | | / | | | |
139 | FreeBSD 4.2 Darwin/ | NetBSD 1.4.3 | |
140 | | Mac OS X | OpenBSD 2.8 BSD/OS 4.2
143 | | 10.0 NetBSD 1.5 | |
144 | FreeBSD 4.3 | | | | |
145 | | | | | OpenBSD 2.9 |
146 | | | | NetBSD 1.5.1 | |
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 | | |
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
163 | FreeBSD 4.9 | | | | OpenBSD 3.4 BSD/OS 5.1 ISE
165 | | | | | NetBSD 1.6.2 |
167 | | | | | | OpenBSD 3.5
169 | FreeBSD 4.10 | | | |
171 | FreeBSD 4.11 | | | |
173 | `-|------|-----------------|---------------------.
177 FreeBSD 5.1 | | | DragonFly 1.0
179 | ----- Mac OS X | | |
183 | FreeBSD 5.2.1 | | | |
185 *-------FreeBSD 5.3 | | | |
186 | | | | OpenBSD 3.6 |
188 | | | | | | | DragonFly 1.2.0
189 | | Mac OS X | | NetBSD 2.0.2 | |
191 | FreeBSD 5.4 | | | | | |
192 | | | | | | OpenBSD 3.7 |
193 | | | | | NetBSD 2.0.3 | |
195 *--FreeBSD | | | | v OpenBSD 3.8 |
198 | | | | | NetBSD 2.1 | |
200 | | | | NetBSD 3.0 | |
201 | | | | | | | | DragonFly 1.4.0
202 | | | | | | | OpenBSD 3.9 |
203 | FreeBSD | | | | | | |
205 | | FreeBSD 5.5 | | | | | |
206 | | | | | NetBSD 3.0.1 | DragonFly 1.6.0
208 | | | | | | OpenBSD 4.0 |
209 | | | | | NetBSD 3.0.2 | |
210 | | | | NetBSD 3.1 | |
211 | FreeBSD 6.2 | | | |
212 | | | | | DragonFly 1.8.0
213 | | | | OpenBSD 4.1 |
214 | | | | | DragonFly 1.10.0
217 | | | | OpenBSD 4.2 |
219 | FreeBSD 6.3 | | | |
221 *--FreeBSD | | | | DragonFly 1.12.0
223 | | | | | OpenBSD 4.3 |
224 | | | | | | DragonFly 2.0.0
225 | | FreeBSD | | OpenBSD 4.4 |
228 | FreeBSD 7.1 | | | |
229 | | | | | DragonFly 2.2.0
230 | FreeBSD 7.2 | NetBSD 5.0 OpenBSD 4.5 |
234 | | | | | | DragonFly 2.4.0
235 | | | | | OpenBSD 4.6 |
237 *--FreeBSD | | | | | |
239 | | FreeBSD | | | | |
240 | | 7.3 | | | | DragonFly 2.6.0
241 | | | | | | OpenBSD 4.7 |
242 | FreeBSD | | | | | |
244 | | | | | | | DragonFly 2.8.2
245 | | | | | | OpenBSD 4.8 |
246 | | | | | NetBSD 5.1 | |
247 | FreeBSD FreeBSD | | | |
248 | 8.2 7.4 | | | DragonFly 2.10.1
249 | v | | OpenBSD 4.9 |
254 FreeBSD 9 -current | NetBSD -current OpenBSD -current |
261 Time tolerance +/- 6 months, depending on which book/article you read; if it
262 was the announcement in Usenet or if it was available as tape.
264 [44B] McKusick, Marshall Kirk, Keith Bostic, Michael J Karels,
265 and John Quarterman. The Design and Implementation of
266 the 4.4BSD Operating System.
267 [APL] Apple website [http://www.apple.com/macosx/]
268 [BSDI] Berkeley Software Design, Inc.
269 [DFB] DragonFlyBSD Project, The.
270 [DOC] README, COPYRIGHT on tape.
271 [FBD] FreeBSD Project, The.
272 [KB] Keith Bostic. BSD2.10 available from Usenix. comp.unix.sources,
273 Volume 11, Info 4, April, 1987.
274 [KKK] Mike Karels, Kirk McKusick, and Keith Bostic. tahoe announcement.
275 comp.bugs.4bsd.ucb-fixes, June 15, 1988.
276 [KSJ] Michael J. Karels, Carl F. Smith, and William F. Jolitz.
277 Changes in the Kernel in 2.9BSD. Second Berkeley Software
278 Distribution UNIX Version 2.9, July, 1983.
279 [NBD] NetBSD Project, The.
280 [OBD] OpenBSD Project, The.
281 [QCU] Salus, Peter H. A quarter century of UNIX.
282 [SMS] Steven M. Schultz. 2.11BSD, UNIX for the PDP-11.
283 [TUHS] The Unix Historical Society. http://minnie.tuhs.org/Unix_History/.
284 [USE] Usenet announcement.
285 [WRS] Wind River Systems, Inc.
286 [dmr] Dennis Ritchie, via E-Mail
291 First Edition 1971-11-03 [QCU]
292 DEC PDP-11/20, Assembler
293 Second Edition 1972-06-12 [QCU]
294 10 UNIX installations
295 Third Edition 1973-02-xx [QCU]
296 Pipes, 16 installations
297 Fourth Edition 1973-11-xx [QCU]
298 rewriting in C effected,
299 above 30 installations
300 Fifth Edition 1974-06-xx [QCU]
301 above 50 installations
302 Sixth Edition 1975-05-xx [QCU]
304 Seventh Edition 1979-01-xx [QCU]
306 Eighth Edition 1985-02-xx [QCU]
307 VAX 11/750, VAX 11/780 [dmr]
308 descended from 4.1c BSD [dmr]
309 descended from 4.1 BSD [44B]
310 scooping-out and replacement of the character-device
311 and networking part by the streams mechanism
313 Ninth Edition 1986-09-xx [QCU]
314 Tenth Edition 1989-10-xx [QCU]
318 PDP-11, Pascal, ex(1)
319 30 free copies of 1BSD sent out
320 35 tapes sold for 50 USD [QCU]
321 2BSD mid 1978 [QCU] 1979-05-10 [TUHS]
322 75 2BSD tapes shipped
323 2.79BSD 1980-04-xx [TUHS]
324 2.8BSD 1981-07-xx [KSJ]
326 2.8.1BSD 1982-01-xx [QCU]
327 set of performance improvements
328 2.9BSD 1983-07-xx [KSJ]
329 2.9.1BSD 1983-11-xx [TUHS]
330 2.9BSD-Seismo 1985-08-xx [SMS]
331 2.10BSD 1987-04-xx [KKK]
332 2.10.1BSD 1989-01-xx [SMS]
333 2.11BSD 1992-02-xx [SMS]
334 2.11BSD rev #430 1999-12-13 [SMS]
336 32V 1978-1[01]-xx [QCU]
337 3BSD late 1979 [QCU] March 1980 [TUHS]
338 virtual memory, page replacement,
341 4.1BSD 1981-07-08 [DOC]
343 alpha release, 100 sites, networking [44B]
344 4.1bBSD internal release, fast filesystem [44B]
346 beta release, IPC [44B]
347 4.2BSD 1983-09-xx [QCU]
349 4.3BSD 1986-06-xx [QCU]
350 1986-04-05 [KB], [DOC]
351 4.3BSD Tahoe 1988-06-15 [QCU], [DOC]
352 4.3BSD NET/1 1988-11-xx [QCU]
354 4.3BSD Reno 1990-06-29 [QCU], [DOC]
355 4.3BSD NET/2 1991-06-28 [QCU], [DOC]
357 BSD/386 ALPHA 1991-12-xx [BSDI]
358 first code released to people outside BSDI
359 386BSD 0.0 1992-02-xx [DOC]
360 BSD/386 0.3.1 1992-04-xx [BSDI] first ext. beta; B customers
361 BSD/386 0.3.3 1992-06-xx [BSDI] first CDROM version
362 386BSD 0.1 1992-07-28 [DOC]
363 4.4BSD Alpha 1992-07-07
364 BSD/386 0.9.3 1992-10-xx [BSDI]
365 first external gamma; G customers
366 BSD/386 0.9.4 1992-12-xx [BSDI]
367 would have been 1.0 except for request
368 for preliminary injunction
369 BSD/386 1.0 1993-03-xx [BSDI]
370 injunction denied; first official release
371 NetBSD 0.8 1993-04-20 [NBD]
372 4.4BSD 1993-06-01 [USE]
373 NetBSD 0.9 1993-08-23 [NBD]
374 FreeBSD 1.0 1993-11-01 [FBD]
375 FreeBSD 1.0.2 1993-11-14 [FBD]
376 supersedes 1.0 13 days after release.
377 BSD/386 1.1 1994-02-xx [BSDI]
378 4.4BSD Lite 1994-03-01 [USE]
379 FreeBSD 1.1 1994-05-07 [FBD]
380 FreeBSD 1.1.5 1994-06-30 [FBD]
381 FreeBSD 1.1.5.1 1994-07-05 [FBD]
382 supersedes 1.1.5 5 days after release.
383 NetBSD 1.0 1994-10-26 [NBD]
384 386BSD 1.0 1994-11-12 [USE]
385 FreeBSD 2.0 1994-11-23 [FBD]
386 BSD/OS 2.0 1995-01-xx [BSDI] 4.4 lite based
387 FreeBSD 2.0.5 1995-06-10 [FBD]
388 BSD/OS 2.0.1 1995-06-xx [BSDI]
389 4.4BSD Lite Release 2 1995-06-xx [44B]
390 the true final distribution from the CSRG
391 FreeBSD 2.1.0 1995-11-19 [FBD]
392 NetBSD 1.1 1995-11-26 [NBD]
393 BSD/OS 2.1 1996-01-xx [BSDI]
394 FreeBSD 2.1.5 1996-07-14 [FBD]
395 NetBSD 1.2 1996-10-04 [NBD]
396 OpenBSD 2.0 1996-10-18 [OBD]
397 FreeBSD 2.1.6 1996-11-16 [FBD]
398 FreeBSD 2.1.6.1 1996-11-25 [FBD] (sendmail security release)
400 FreeBSD 2.1.7 1997-02-20 [FBD]
401 BSD/OS 3.0 1997-02-xx [BSDI] 4.4 lite2 based
402 FreeBSD 2.2.0 1997-03-16 [FBD]
403 FreeBSD 2.2.1 1997-03-25 [FBD]
404 FreeBSD 2.2.2 1997-05-16 [FBD]
405 NetBSD 1.2.1 1997-05-20 [NBD] (patch release)
406 OpenBSD 2.1 1997-06-01 [OBD]
407 FreeBSD 2.2.5 1997-10-22 [FBD]
408 OpenBSD 2.2 1997-12-01 [OBD]
409 NetBSD 1.3 1998-01-04 [NBD]
410 FreeBSD 2.2.6 1998-03-25 [FBD]
411 NetBSD 1.3.1 1998-03-09 [NBD] (patch release)
412 BSD/OS 3.1 1998-03-xx [BSDI]
413 OpenBSD 2.3 1998-05-19 [OBD]
414 NetBSD 1.3.2 1998-05-29 [NBD] (patch release)
415 FreeBSD 2.2.7 1998-07-22 [FBD]
416 BSD/OS 4.0 1998-08-xx [BSDI]
417 2-lock MP support, ELF executables
418 FreeBSD 3.0 1998-10-16 [FBD]
419 FreeBSD-3.0 is a snapshot from -current,
420 while 3.1 and 3.2 are from 3.x-stable which
421 was branched quite some time after 3.0-release
422 FreeBSD 2.2.8 1998-11-29 [FBD]
423 OpenBSD 2.4 1998-12-01 [OBD]
424 NetBSD 1.3.3 1998-12-23 [NBD] (patch release)
425 FreeBSD 3.1 1999-02-15 [FBD]
426 BSD/OS 4.0.1 1999-03-xx [BSDI]
427 NetBSD 1.4 1999-05-12 [NBD]
428 FreeBSD 3.2 1999-05-17 [FBD]
429 OpenBSD 2.5 1999-05-19 [OBD]
430 NetBSD 1.4.1 1999-08-26 [NBD] (patch release)
431 FreeBSD 3.3 1999-09-17 [FBD]
432 OpenBSD 2.6 1999-12-01 [OBD]
433 FreeBSD 3.4 1999-12-20 [FBD]
434 BSD/OS 4.1 1999-12-xx [BSDI]
435 FreeBSD 4.0 2000-03-13 [FBD]
436 NetBSD 1.4.2 2000-03-19 [NBD] (patch release)
437 OpenBSD 2.7 2000-06-15 [OBD]
438 FreeBSD 3.5 2000-06-24 [FBD]
439 FreeBSD 4.1 2000-07-27 [FBD]
440 FreeBSD 3.5.1 2000-07-28 [FBD]
441 FreeBSD 4.1.1 2000-09-25 [FBD] (a network-only patch release)
442 FreeBSD 4.2 2000-11-21 [FBD]
443 NetBSD 1.4.3 2000-11-25 [NBD] (patch release)
444 BSD/OS 4.2 2000-11-29 [BSDI]
445 OpenBSD 2.8 2000-12-01 [OBD]
446 NetBSD 1.5 2000-12-06 [NBD]
447 Mac OS X 10.0 2001-03-24 [APL]
448 FreeBSD 4.3 2001-04-20 [FBD]
449 OpenBSD 2.9 2001-06-01 [OBD]
450 NetBSD 1.5.1 2001-07-11 [NBD] (patch release)
451 NetBSD 1.5.2 2001-09-13 [NBD] (patch release)
452 FreeBSD 4.4 2001-09-18 [FBD]
453 Mac OS X 10.1 2001-09-29 [APL]
454 OpenBSD 3.0 2001-12-01 [OBD]
455 FreeBSD 4.5 2002-01-29 [FBD]
456 BSD/OS 4.3 2002-03-14 [WRS]
457 OpenBSD 3.1 2002-05-19 [OBD]
458 FreeBSD 4.6 2002-06-15 [FBD]
459 NetBSD 1.5.3 2002-07-22 [NBD] (patch release)
460 FreeBSD 4.6.2 2002-08-15 [FBD] (patch release)
461 Mac OS X 10.2 2002-08-23 [APL]
462 NetBSD 1.6 2002-09-14 [NBD]
463 FreeBSD 4.7 2002-10-08 [FBD]
464 OpenBSD 3.2 2002-11-01 [OBD]
465 FreeBSD 5.0 2003-01-17 [FBD]
466 FreeBSD 5.0 is a separate branch off of
467 -current, similar to 3.0.
468 FreeBSD 4.8 2003-04-03 [FBD]
469 NetBSD 1.6.1 2003-04-21 [NBD] (patch release)
470 OpenBSD 3.3 2003-05-01 [OBD]
471 BSD/OS 5.0 2003-05-?? [WRS]
472 FreeBSD 5.1 2003-06-09 [FBD]
473 Mac OS X 10.3 2003-10-24 [APL]
474 FreeBSD 4.9 2003-10-28 [FBD]
475 BSD/OS 5.1 ISE 2003-10-?? [WRS] (final version)
476 OpenBSD 3.4 2003-11-01 [OBD]
477 FreeBSD 5.2 2004-01-12 [FBD]
478 FreeBSD 5.2.1 2004-02-22 [FBD] (patch release)
479 NetBSD 1.6.2 2004-03-01 [NBD] (patch release)
480 OpenBSD 3.5 2004-04-01 [OBD]
481 FreeBSD 4.10 2004-05-27 [FBD]
482 DragonFly 1.0 2004-07-12 [DFB]
483 OpenBSD 3.6 2004-10-29 [OBD]
484 FreeBSD 5.3 2004-11-06 [FBD]
485 NetBSD 2.0 2004-12-09 [NBD]
486 FreeBSD 4.11 2005-01-25 [FBD]
487 DragonFly 1.2.0 2005-04-08 [DFB]
488 NetBSD 2.0.2 2005-04-14 [NBD] (security/critical release)
489 Mac OS X 10.4 2005-04-29 [APL]
490 FreeBSD 5.4 2005-05-09 [FBD]
491 OpenBSD 3.7 2005-05-19 [OBD]
492 NetBSD 2.0.3 2005-10-31 [NBD] (security/critical release)
493 OpenBSD 3.8 2005-11-01 [OBD]
494 FreeBSD 6.0 2005-11-01 [FBD]
495 NetBSD 2.1 2005-11-02 [NBD]
496 NetBSD 3.0 2005-12-23 [NBD]
497 DragonFly 1.4.0 2006-01-08 [DFB]
498 OpenBSD 3.9 2006-05-01 [OBD]
499 FreeBSD 6.1 2006-05-08 [FBD]
500 FreeBSD 5.5 2006-05-25 [FBD]
501 NetBSD 3.0.1 2006-07-24 [NBD] (security/critical release)
502 DragonFly 1.6.0 2006-07-24 [DFB]
503 OpenBSD 4.0 2006-11-01 [OBD]
504 NetBSD 3.0.2 2006-11-04 [NBD] (security/critical release)
505 NetBSD 3.1 2006-11-04 [NBD]
506 FreeBSD 6.2 2007-01-15 [FBD]
507 DragonFly 1.8.0 2007-01-30 [DFB]
508 OpenBSD 4.1 2007-05-01 [OBD]
509 DragonFly 1.10.0 2007-08-06 [DFB]
510 Mac OS X 10.5 2007-10-26 [APL]
511 OpenBSD 4.2 2007-11-01 [OBD]
512 NetBSD 4.0 2007-12-19 [NBD]
513 FreeBSD 6.3 2008-01-18 [FBD]
514 DragonFly 1.12.0 2008-02-26 [DFB]
515 FreeBSD 7.0 2008-02-27 [FBD]
516 OpenBSD 4.3 2008-05-01 [OBD]
517 DragonFly 2.0.0 2008-07-21 [DFB]
518 OpenBSD 4.4 2008-11-01 [OBD]
519 FreeBSD 6.4 2008-11-28 [FBD]
520 FreeBSD 7.1 2009-01-04 [FBD]
521 DragonFly 2.2.0 2009-02-17 [DFB]
522 NetBSD 5.0 2009-04-29 [NBD]
523 OpenBSD 4.5 2009-05-01 [OBD]
524 FreeBSD 7.2 2009-05-04 [FBD]
525 Mac OS X 10.6 2009-06-08 [APL]
526 DragonFly 2.4.0 2009-09-16 [DFB]
527 OpenBSD 4.6 2009-10-18 [OBD]
528 FreeBSD 8.0 2009-11-26 [FBD]
529 FreeBSD 7.3 2010-03-23 [FBD]
530 DragonFly 2.6.0 2010-03-28 [DFB]
531 OpenBSD 4.7 2010-05-19 [OBD]
532 FreeBSD 8.1 2010-07-24 [FBD]
533 DragonFly 2.8.2 2010-10-30 [DFB]
534 OpenBSD 4.8 2010-11-01 [OBD]
535 NetBSD 5.1 2010-11-19 [NBD]
536 FreeBSD 7.4 2011-02-24 [FBD]
537 FreeBSD 8.2 2011-02-24 [FBD]
538 DragonFly 2.10.1 2011-04-26 [DFB]
539 OpenBSD 4.9 2011-05-01 [OBD]
540 OpenBSD 5.0 2011-11-01 [OBD]
543 ------------------------
545 Leffler, Samuel J., Marshall Kirk McKusick, Michael J Karels and John
546 Quarterman. The Design and Implementation of the 4.3BSD UNIX Operating
547 System. Reading, Mass. Addison-Wesley, 1989. ISBN 0-201-06196-1
549 Salus, Peter H. A quarter century of UNIX. Addison-Wesley Publishing
550 Company, Inc., 1994. ISBN 0-201-54777-5
552 McKusick, Marshall Kirk, Keith Bostic, Michael J Karels, and John
553 Quarterman. The Design and Implementation of the 4.4BSD Operating
554 System. Reading, Mass. Addison-Wesley, 1996. ISBN 0-201-54979-4
556 McKusick, Marshall Kirk, George Neville-Neil. The Design and
557 Implementation of the FreeBSD Operating System.
558 Addison-Wesley Professional, Published: Aug 2, 2004. ISBN 0-201-70245-2
560 Doug McIlroy. Research Unix Reader.
562 Michael G. Brown. The Role of BSD in the Development of Unix.
563 Presented to the Tasmanian Unix Special Interest Group of the
564 Australian Computer Society, Hobart, August 1993.
566 Peter H. Salus. Unix at 25. Byte Magazine, October 1994.
567 URL: http://www.byte.com/art/9410/sec8/art3.htm
569 Andreas Klemm, Lars Köller. If you're going to San Francisco ...
570 Die freien BSD-Varianten von Unix. c't April 1997, page 368ff.
572 BSD Release Announcements collection.
573 URL: http://www.FreeBSD.org/releases/
575 BSD Hypertext Man Pages
576 URL: http://www.FreeBSD.org/cgi/man.cgi
578 UNIX history graphing project
579 URL: http://minnie.tuhs.org/Unix_History/index.html
582 URL: http://www.levenez.com/unix/
584 James Howard: The BSD Family Tree
585 URL: http://ezine.daemonnews.org/200104/bsd_family.html
586 ("what are the differences between FreeBSD, NetBSD, and OpenBSD?")
592 Josh Gilliam for suggestions, bug fixes, and finding very old
593 original BSD announcements from Usenet or tapes.
595 Steven M. Schultz for providing 2.8BSD, 2.10BSD, 2.11BSD manual pages.
598 Copyright (c) 1997-2007 Wolfram Schneider <wosch@FreeBSD.ORG>
599 URL: http://cvsweb.freebsd.org/src/share/misc/bsd-family-tree
601 $FreeBSD: src/share/misc/bsd-family-tree,v 1.148 2011/11/02 14:28:36 maxim Exp $