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 | | | | | NetBSD | DragonFly 2.0.0
225 | | FreeBSD | | 4.0.1 OpenBSD 4.4 |
228 | FreeBSD 7.1 | | | |
229 | | | | | DragonFly 2.2.0
230 | FreeBSD 7.2 | NetBSD 5.0 OpenBSD 4.5 |
232 | | Mac OS X | | \ | |
234 | | | | | NetBSD | DragonFly 2.4.0
235 | | | | | 5.0.1 OpenBSD 4.6 |
237 *--FreeBSD | | | | | | |
239 | | FreeBSD | | | NetBSD | |
240 | | 7.3 | | | 5.0.2 | DragonFly 2.6.0
241 | | | | | | OpenBSD 4.7 |
242 | FreeBSD | | | | | |
244 | | | | | | | DragonFly 2.8.2
245 | | | | | | OpenBSD 4.8 |
246 | | | | | *--NetBSD | |
247 | FreeBSD FreeBSD | | | 5.1 | |
248 | 8.2 7.4 | | | | | DragonFly 2.10.1
249 | | | | | | OpenBSD 4.9 |
250 | `-----. Mac OS X | | | | |
252 | | | | | | OpenBSD 5.0 |
253 *--FreeBSD | | | | | | |
254 | 9.0 | | | | NetBSD | DragonFly 3.0.1
255 | | FreeBSD | | | 5.1.2 | |
257 | | | | | | NetBSD | |
258 | | | | | | 5.1.3 | |
259 | | | | | | OpenBSD 5.1 |
260 | | | Mac OS X | `----. | |
262 | | | | NetBSD 6.0 | | |
263 | | | | | | | | OpenBSD 5.2 DragonFly 3.2.1
264 | FreeBSD | | | | | NetBSD | |
265 | 9.1 | | | | | 5.2 | |
267 | | | | | | | NetBSD | |
268 | | | | | | | 5.2.1 | |
271 | | | | | | NetBSD | |
272 | | | | | | 6.0.1 | |
274 | | | | | | NetBSD | |
275 | | | | | | 6.0.2 | |
276 | | | | | | | OpenBSD 5.3 DragonFly 3.4.1
277 | | | | | | NetBSD | |
278 | | | | | | 6.0.2 | |
280 | | | | | |`-NetBSD 6.1 | |
281 | | FreeBSD | | | | |
282 | | 8.4 | | NetBSD 6.1.1 | |
284 | FreeBSD | | NetBSD 6.1.2 | |
290 FreeBSD 10 -current | NetBSD -current OpenBSD -current |
297 Time tolerance +/- 6 months, depending on which book/article you read; if it
298 was the announcement in Usenet or if it was available as tape.
300 [44B] McKusick, Marshall Kirk, Keith Bostic, Michael J Karels,
301 and John Quarterman. The Design and Implementation of
302 the 4.4BSD Operating System.
303 [APL] Apple website [http://www.apple.com/macosx/]
304 [BSDI] Berkeley Software Design, Inc.
305 [DFB] DragonFlyBSD Project, The.
306 [DOC] README, COPYRIGHT on tape.
307 [FBD] FreeBSD Project, The.
308 [KB] Keith Bostic. BSD2.10 available from Usenix. comp.unix.sources,
309 Volume 11, Info 4, April, 1987.
310 [KKK] Mike Karels, Kirk McKusick, and Keith Bostic. tahoe announcement.
311 comp.bugs.4bsd.ucb-fixes, June 15, 1988.
312 [KSJ] Michael J. Karels, Carl F. Smith, and William F. Jolitz.
313 Changes in the Kernel in 2.9BSD. Second Berkeley Software
314 Distribution UNIX Version 2.9, July, 1983.
315 [NBD] NetBSD Project, The.
316 [OBD] OpenBSD Project, The.
317 [QCU] Salus, Peter H. A quarter century of UNIX.
318 [SMS] Steven M. Schultz. 2.11BSD, UNIX for the PDP-11.
319 [TUHS] The Unix Historical Society. http://minnie.tuhs.org/Unix_History/.
320 [USE] Usenet announcement.
321 [WRS] Wind River Systems, Inc.
322 [dmr] Dennis Ritchie, via E-Mail
327 First Edition 1971-11-03 [QCU]
328 DEC PDP-11/20, Assembler
329 Second Edition 1972-06-12 [QCU]
330 10 UNIX installations
331 Third Edition 1973-02-xx [QCU]
332 Pipes, 16 installations
333 Fourth Edition 1973-11-xx [QCU]
334 rewriting in C effected,
335 above 30 installations
336 Fifth Edition 1974-06-xx [QCU]
337 above 50 installations
338 Sixth Edition 1975-05-xx [QCU]
340 Seventh Edition 1979-01-xx [QCU]
342 Eighth Edition 1985-02-xx [QCU]
343 VAX 11/750, VAX 11/780 [dmr]
344 descended from 4.1c BSD [dmr]
345 descended from 4.1 BSD [44B]
346 scooping-out and replacement of the character-device
347 and networking part by the streams mechanism
349 Ninth Edition 1986-09-xx [QCU]
350 Tenth Edition 1989-10-xx [QCU]
354 PDP-11, Pascal, ex(1)
355 30 free copies of 1BSD sent out
356 35 tapes sold for 50 USD [QCU]
357 2BSD mid 1978 [QCU] 1979-05-10 [TUHS]
358 75 2BSD tapes shipped
359 2.79BSD 1980-04-xx [TUHS]
360 2.8BSD 1981-07-xx [KSJ]
362 2.8.1BSD 1982-01-xx [QCU]
363 set of performance improvements
364 2.9BSD 1983-07-xx [KSJ]
365 2.9.1BSD 1983-11-xx [TUHS]
366 2.9BSD-Seismo 1985-08-xx [SMS]
367 2.10BSD 1987-04-xx [KKK]
368 2.10.1BSD 1989-01-xx [SMS]
369 2.11BSD 1992-02-xx [SMS]
370 2.11BSD rev #430 1999-12-13 [SMS]
372 32V 1978-1[01]-xx [QCU]
373 3BSD late 1979 [QCU] March 1980 [TUHS]
374 virtual memory, page replacement,
377 4.1BSD 1981-07-08 [DOC]
379 alpha release, 100 sites, networking [44B]
380 4.1bBSD internal release, fast filesystem [44B]
382 beta release, IPC [44B]
383 4.2BSD 1983-09-xx [QCU]
385 4.3BSD 1986-06-xx [QCU]
386 1986-04-05 [KB], [DOC]
387 4.3BSD Tahoe 1988-06-15 [QCU], [DOC]
388 4.3BSD NET/1 1988-11-xx [QCU]
390 4.3BSD Reno 1990-06-29 [QCU], [DOC]
391 4.3BSD NET/2 1991-06-28 [QCU], [DOC]
393 BSD/386 ALPHA 1991-12-xx [BSDI]
394 first code released to people outside BSDI
395 386BSD 0.0 1992-02-xx [DOC]
396 BSD/386 0.3.1 1992-04-xx [BSDI] first ext. beta; B customers
397 BSD/386 0.3.3 1992-06-xx [BSDI] first CDROM version
398 386BSD 0.1 1992-07-28 [DOC]
399 4.4BSD Alpha 1992-07-07
400 BSD/386 0.9.3 1992-10-xx [BSDI]
401 first external gamma; G customers
402 BSD/386 0.9.4 1992-12-xx [BSDI]
403 would have been 1.0 except for request
404 for preliminary injunction
405 BSD/386 1.0 1993-03-xx [BSDI]
406 injunction denied; first official release
407 NetBSD 0.8 1993-04-20 [NBD]
408 4.4BSD 1993-06-01 [USE]
409 NetBSD 0.9 1993-08-23 [NBD]
410 FreeBSD 1.0 1993-11-01 [FBD]
411 FreeBSD 1.0.2 1993-11-14 [FBD]
412 supersedes 1.0 13 days after release.
413 BSD/386 1.1 1994-02-xx [BSDI]
414 4.4BSD Lite 1994-03-01 [USE]
415 FreeBSD 1.1 1994-05-07 [FBD]
416 FreeBSD 1.1.5 1994-06-30 [FBD]
417 FreeBSD 1.1.5.1 1994-07-05 [FBD]
418 supersedes 1.1.5 5 days after release.
419 NetBSD 1.0 1994-10-26 [NBD]
420 386BSD 1.0 1994-11-12 [USE]
421 FreeBSD 2.0 1994-11-23 [FBD]
422 BSD/OS 2.0 1995-01-xx [BSDI] 4.4 lite based
423 FreeBSD 2.0.5 1995-06-10 [FBD]
424 BSD/OS 2.0.1 1995-06-xx [BSDI]
425 4.4BSD Lite Release 2 1995-06-xx [44B]
426 the true final distribution from the CSRG
427 FreeBSD 2.1.0 1995-11-19 [FBD]
428 NetBSD 1.1 1995-11-26 [NBD]
429 BSD/OS 2.1 1996-01-xx [BSDI]
430 FreeBSD 2.1.5 1996-07-14 [FBD]
431 NetBSD 1.2 1996-10-04 [NBD]
432 OpenBSD 2.0 1996-10-18 [OBD]
433 FreeBSD 2.1.6 1996-11-16 [FBD]
434 FreeBSD 2.1.6.1 1996-11-25 [FBD] (sendmail security release)
436 FreeBSD 2.1.7 1997-02-20 [FBD]
437 BSD/OS 3.0 1997-02-xx [BSDI] 4.4 lite2 based
438 FreeBSD 2.2.0 1997-03-16 [FBD]
439 FreeBSD 2.2.1 1997-03-25 [FBD]
440 FreeBSD 2.2.2 1997-05-16 [FBD]
441 NetBSD 1.2.1 1997-05-20 [NBD] (patch release)
442 OpenBSD 2.1 1997-06-01 [OBD]
443 FreeBSD 2.2.5 1997-10-22 [FBD]
444 OpenBSD 2.2 1997-12-01 [OBD]
445 NetBSD 1.3 1998-01-04 [NBD]
446 FreeBSD 2.2.6 1998-03-25 [FBD]
447 NetBSD 1.3.1 1998-03-09 [NBD] (patch release)
448 BSD/OS 3.1 1998-03-xx [BSDI]
449 OpenBSD 2.3 1998-05-19 [OBD]
450 NetBSD 1.3.2 1998-05-29 [NBD] (patch release)
451 FreeBSD 2.2.7 1998-07-22 [FBD]
452 BSD/OS 4.0 1998-08-xx [BSDI]
453 2-lock MP support, ELF executables
454 FreeBSD 3.0 1998-10-16 [FBD]
455 FreeBSD-3.0 is a snapshot from -current,
456 while 3.1 and 3.2 are from 3.x-stable which
457 was branched quite some time after 3.0-release
458 FreeBSD 2.2.8 1998-11-29 [FBD]
459 OpenBSD 2.4 1998-12-01 [OBD]
460 NetBSD 1.3.3 1998-12-23 [NBD] (patch release)
461 FreeBSD 3.1 1999-02-15 [FBD]
462 BSD/OS 4.0.1 1999-03-xx [BSDI]
463 NetBSD 1.4 1999-05-12 [NBD]
464 FreeBSD 3.2 1999-05-17 [FBD]
465 OpenBSD 2.5 1999-05-19 [OBD]
466 NetBSD 1.4.1 1999-08-26 [NBD] (patch release)
467 FreeBSD 3.3 1999-09-17 [FBD]
468 OpenBSD 2.6 1999-12-01 [OBD]
469 FreeBSD 3.4 1999-12-20 [FBD]
470 BSD/OS 4.1 1999-12-xx [BSDI]
471 FreeBSD 4.0 2000-03-13 [FBD]
472 NetBSD 1.4.2 2000-03-19 [NBD] (patch release)
473 OpenBSD 2.7 2000-06-15 [OBD]
474 FreeBSD 3.5 2000-06-24 [FBD]
475 FreeBSD 4.1 2000-07-27 [FBD]
476 FreeBSD 3.5.1 2000-07-28 [FBD]
477 FreeBSD 4.1.1 2000-09-25 [FBD] (a network-only patch release)
478 FreeBSD 4.2 2000-11-21 [FBD]
479 NetBSD 1.4.3 2000-11-25 [NBD] (patch release)
480 BSD/OS 4.2 2000-11-29 [BSDI]
481 OpenBSD 2.8 2000-12-01 [OBD]
482 NetBSD 1.5 2000-12-06 [NBD]
483 Mac OS X 10.0 2001-03-24 [APL]
484 FreeBSD 4.3 2001-04-20 [FBD]
485 OpenBSD 2.9 2001-06-01 [OBD]
486 NetBSD 1.5.1 2001-07-11 [NBD] (patch release)
487 NetBSD 1.5.2 2001-09-13 [NBD] (patch release)
488 FreeBSD 4.4 2001-09-18 [FBD]
489 Mac OS X 10.1 2001-09-29 [APL]
490 OpenBSD 3.0 2001-12-01 [OBD]
491 FreeBSD 4.5 2002-01-29 [FBD]
492 BSD/OS 4.3 2002-03-14 [WRS]
493 OpenBSD 3.1 2002-05-19 [OBD]
494 FreeBSD 4.6 2002-06-15 [FBD]
495 NetBSD 1.5.3 2002-07-22 [NBD] (patch release)
496 FreeBSD 4.6.2 2002-08-15 [FBD] (patch release)
497 Mac OS X 10.2 2002-08-23 [APL]
498 NetBSD 1.6 2002-09-14 [NBD]
499 FreeBSD 4.7 2002-10-08 [FBD]
500 OpenBSD 3.2 2002-11-01 [OBD]
501 FreeBSD 5.0 2003-01-17 [FBD]
502 FreeBSD 5.0 is a separate branch off of
503 -current, similar to 3.0.
504 FreeBSD 4.8 2003-04-03 [FBD]
505 NetBSD 1.6.1 2003-04-21 [NBD] (patch release)
506 OpenBSD 3.3 2003-05-01 [OBD]
507 BSD/OS 5.0 2003-05-?? [WRS]
508 FreeBSD 5.1 2003-06-09 [FBD]
509 Mac OS X 10.3 2003-10-24 [APL]
510 FreeBSD 4.9 2003-10-28 [FBD]
511 BSD/OS 5.1 ISE 2003-10-?? [WRS] (final version)
512 OpenBSD 3.4 2003-11-01 [OBD]
513 FreeBSD 5.2 2004-01-12 [FBD]
514 FreeBSD 5.2.1 2004-02-22 [FBD] (patch release)
515 NetBSD 1.6.2 2004-03-01 [NBD] (patch release)
516 OpenBSD 3.5 2004-04-01 [OBD]
517 FreeBSD 4.10 2004-05-27 [FBD]
518 DragonFly 1.0 2004-07-12 [DFB]
519 OpenBSD 3.6 2004-10-29 [OBD]
520 FreeBSD 5.3 2004-11-06 [FBD]
521 NetBSD 2.0 2004-12-09 [NBD]
522 FreeBSD 4.11 2005-01-25 [FBD]
523 DragonFly 1.2.0 2005-04-08 [DFB]
524 NetBSD 2.0.2 2005-04-14 [NBD] (security/critical release)
525 Mac OS X 10.4 2005-04-29 [APL]
526 FreeBSD 5.4 2005-05-09 [FBD]
527 OpenBSD 3.7 2005-05-19 [OBD]
528 NetBSD 2.0.3 2005-10-31 [NBD] (security/critical release)
529 OpenBSD 3.8 2005-11-01 [OBD]
530 FreeBSD 6.0 2005-11-01 [FBD]
531 NetBSD 2.1 2005-11-02 [NBD]
532 NetBSD 3.0 2005-12-23 [NBD]
533 DragonFly 1.4.0 2006-01-08 [DFB]
534 OpenBSD 3.9 2006-05-01 [OBD]
535 FreeBSD 6.1 2006-05-08 [FBD]
536 FreeBSD 5.5 2006-05-25 [FBD]
537 NetBSD 3.0.1 2006-07-24 [NBD] (security/critical release)
538 DragonFly 1.6.0 2006-07-24 [DFB]
539 OpenBSD 4.0 2006-11-01 [OBD]
540 NetBSD 3.0.2 2006-11-04 [NBD] (security/critical release)
541 NetBSD 3.1 2006-11-04 [NBD]
542 FreeBSD 6.2 2007-01-15 [FBD]
543 DragonFly 1.8.0 2007-01-30 [DFB]
544 OpenBSD 4.1 2007-05-01 [OBD]
545 DragonFly 1.10.0 2007-08-06 [DFB]
546 Mac OS X 10.5 2007-10-26 [APL]
547 OpenBSD 4.2 2007-11-01 [OBD]
548 NetBSD 4.0 2007-12-19 [NBD]
549 FreeBSD 6.3 2008-01-18 [FBD]
550 DragonFly 1.12.0 2008-02-26 [DFB]
551 FreeBSD 7.0 2008-02-27 [FBD]
552 OpenBSD 4.3 2008-05-01 [OBD]
553 DragonFly 2.0.0 2008-07-21 [DFB]
554 OpenBSD 4.4 2008-11-01 [OBD]
555 FreeBSD 6.4 2008-11-28 [FBD]
556 FreeBSD 7.1 2009-01-04 [FBD]
557 DragonFly 2.2.0 2009-02-17 [DFB]
558 NetBSD 5.0 2009-04-29 [NBD]
559 OpenBSD 4.5 2009-05-01 [OBD]
560 FreeBSD 7.2 2009-05-04 [FBD]
561 Mac OS X 10.6 2009-06-08 [APL]
562 NetBSD 5.0.1 2009-08-02 [NBD] (security/critical release)
563 DragonFly 2.4.0 2009-09-16 [DFB]
564 OpenBSD 4.6 2009-10-18 [OBD]
565 FreeBSD 8.0 2009-11-26 [FBD]
566 NetBSD 5.0.2 2010-02-12 [NBD] (security/critical release)
567 FreeBSD 7.3 2010-03-23 [FBD]
568 DragonFly 2.6.0 2010-03-28 [DFB]
569 OpenBSD 4.7 2010-05-19 [OBD]
570 FreeBSD 8.1 2010-07-24 [FBD]
571 DragonFly 2.8.2 2010-10-30 [DFB]
572 OpenBSD 4.8 2010-11-01 [OBD]
573 NetBSD 5.1 2010-11-19 [NBD]
574 FreeBSD 7.4 2011-02-24 [FBD]
575 FreeBSD 8.2 2011-02-24 [FBD]
576 DragonFly 2.10.1 2011-04-26 [DFB]
577 OpenBSD 4.9 2011-05-01 [OBD]
578 Mac OS X 10.7 2011-07-20 [APL]
579 OpenBSD 5.0 2011-11-01 [OBD]
580 FreeBSD 9.0 2012-01-12 [FBD]
581 NetBSD 5.1.2 2012-02-02 [NBD] (security/critical release)
582 DragonFly 3.0.1 2012-02-21 [DFB]
583 FreeBSD 8.3 2012-04-18 [FBD]
584 OpenBSD 5.1 2012-05-01 [OBD]
585 Mac OS X 10.8 2012-07-25 [APL]
586 NetBSD 6.0 2012-10-17 [NBD]
587 OpenBSD 5.2 2012-11-01 [OBD]
588 DragonFly 3.2.1 2012-11-02 [DFB]
589 NetBSD 5.2 2012-12-03 [NBD]
590 NetBSD 6.0.1 2012-12-26 [NBD] (security/critical release)
591 FreeBSD 9.1 2012-12-30 [FBD]
592 DragonFly 3.4.1 2013-04-29 [DFB]
593 OpenBSD 5.3 2013-05-01 [OBD]
594 NetBSD 6.0.2 2013-05-18 [NBD] (security/critical release)
595 NetBSD 6.1 2013-05-18 [NBD]
596 FreeBSD 8.4 2013-06-07 [FBD]
597 NetBSD 6.1.1 2013-08-22 [NBD]
598 NetBSD 5.1.3 2013-09-29 [NBD]
599 NetBSD 5.2.1 2013-09-29 [NBD]
600 FreeBSD 9.2 2013-09-30 [FBD]
601 NetBSD 6.0.3 2013-09-30 [NBD]
602 NetBSD 6.1.2 2013-09-30 [NBD]
605 ------------------------
607 Leffler, Samuel J., Marshall Kirk McKusick, Michael J Karels and John
608 Quarterman. The Design and Implementation of the 4.3BSD UNIX Operating
609 System. Reading, Mass. Addison-Wesley, 1989. ISBN 0-201-06196-1
611 Salus, Peter H. A quarter century of UNIX. Addison-Wesley Publishing
612 Company, Inc., 1994. ISBN 0-201-54777-5
614 McKusick, Marshall Kirk, Keith Bostic, Michael J Karels, and John
615 Quarterman. The Design and Implementation of the 4.4BSD Operating
616 System. Reading, Mass. Addison-Wesley, 1996. ISBN 0-201-54979-4
618 McKusick, Marshall Kirk, George Neville-Neil. The Design and
619 Implementation of the FreeBSD Operating System.
620 Addison-Wesley Professional, Published: Aug 2, 2004. ISBN 0-201-70245-2
622 Doug McIlroy. Research Unix Reader.
624 Michael G. Brown. The Role of BSD in the Development of Unix.
625 Presented to the Tasmanian Unix Special Interest Group of the
626 Australian Computer Society, Hobart, August 1993.
628 Peter H. Salus. Unix at 25. Byte Magazine, October 1994.
629 URL: http://www.byte.com/art/9410/sec8/art3.htm
631 Andreas Klemm, Lars Köller. If you're going to San Francisco ...
632 Die freien BSD-Varianten von Unix. c't April 1997, page 368ff.
634 BSD Release Announcements collection.
635 URL: http://www.FreeBSD.org/releases/
637 BSD Hypertext Man Pages
638 URL: http://www.FreeBSD.org/cgi/man.cgi
640 UNIX history graphing project
641 URL: http://minnie.tuhs.org/Unix_History/index.html
644 URL: http://www.levenez.com/unix/
646 James Howard: The BSD Family Tree
647 URL: http://ezine.daemonnews.org/200104/bsd_family.html
648 ("what are the differences between FreeBSD, NetBSD, and OpenBSD?")
654 Josh Gilliam for suggestions, bug fixes, and finding very old
655 original BSD announcements from Usenet or tapes.
657 Steven M. Schultz for providing 2.8BSD, 2.10BSD, 2.11BSD manual pages.
660 Copyright (c) 1997-2012 Wolfram Schneider <wosch@FreeBSD.ORG>
661 URL: http://svnweb.freebsd.org/base/head/share/misc/bsd-family-tree
663 $FreeBSD: head/share/misc/bsd-family-tree 256122 2013-10-07 19:27:54Z eadler $