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
113 | FreeBSD 2.2.8 | | | | | |
115 | v | | | | OpenBSD 2.4 |
116 | FreeBSD 2.2.9 | | | | | |
118 FreeBSD 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 |
126 | FreeBSD 3.3 | | | | NetBSD 1.4.1 | |
127 | | | | | | | OpenBSD 2.6 |
128 | FreeBSD 3.4 | | | | | | |
129 | | | | | | | | BSD/OS 4.1
130 FreeBSD 4.0 | | | | | NetBSD 1.4.2 | |
133 | FreeBSD 3.5 | | | | | OpenBSD 2.7 |
135 | FreeBSD 3.5.1 | | | | | | |
137 *---FreeBSD 4.1 | | | | | | |
139 | FreeBSD 4.1.1 | | / | | | |
141 | FreeBSD 4.2 Darwin/ | NetBSD 1.4.3 | |
142 | | Mac OS X | OpenBSD 2.8 BSD/OS 4.2
145 | | 10.0 NetBSD 1.5 | |
146 | FreeBSD 4.3 | | | | |
147 | | | | | OpenBSD 2.9 |
148 | | | | NetBSD 1.5.1 | |
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 | | |
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
165 | FreeBSD 4.9 | | | | OpenBSD 3.4 BSD/OS 5.1 ISE
167 | | | | | NetBSD 1.6.2 |
169 | | | | | | OpenBSD 3.5
171 | FreeBSD 4.10 | | | |
173 | FreeBSD 4.11 | | | |
175 | `-|------|-----------------|---------------------.
179 FreeBSD 5.1 | | | DragonFly 1.0
181 | ----- Mac OS X | | |
185 | FreeBSD 5.2.1 | | | |
187 *-------FreeBSD 5.3 | | | |
188 | | | | OpenBSD 3.6 |
190 | | | | | | | DragonFly 1.2.0
191 | | Mac OS X | | NetBSD 2.0.2 | |
193 | FreeBSD 5.4 | | | | | |
194 | | | | | | OpenBSD 3.7 |
195 | | | | | NetBSD 2.0.3 | |
197 *--FreeBSD | | | | v OpenBSD 3.8 |
200 | | | | | NetBSD 2.1 | |
202 | | | | NetBSD 3.0 | |
203 | | | | | | | | DragonFly 1.4.0
204 | | | | | | | OpenBSD 3.9 |
205 | FreeBSD | | | | | | |
207 | | FreeBSD 5.5 | | | | | |
208 | | | | | NetBSD 3.0.1 | DragonFly 1.6.0
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
219 | | | | OpenBSD 4.2 |
221 | FreeBSD 6.3 | | | | |
223 *--FreeBSD | | | | | DragonFly 1.12.0
225 | | | | | | OpenBSD 4.3 |
226 | | | | | NetBSD | DragonFly 2.0.0
227 | | FreeBSD | | 4.0.1 OpenBSD 4.4 |
230 | FreeBSD 7.1 | | | |
231 | | | | | DragonFly 2.2.0
232 | FreeBSD 7.2 | NetBSD 5.0 OpenBSD 4.5 |
234 | | Mac OS X | | \ | |
236 | | | | | NetBSD | DragonFly 2.4.0
237 | | | | | 5.0.1 OpenBSD 4.6 |
239 *--FreeBSD | | | | | | |
241 | | FreeBSD | | | NetBSD | |
242 | | 7.3 | | | 5.0.2 | DragonFly 2.6.0
243 | | | | | | OpenBSD 4.7 |
244 | FreeBSD | | | | | |
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 | | | | |
254 | | | | | | OpenBSD 5.0 |
255 *--FreeBSD | | | | | | |
256 | 9.0 | | | | NetBSD | DragonFly 3.0.1
257 | | FreeBSD | | | 5.1.2 | |
259 | | | | | | NetBSD | |
260 | | | | | | 5.1.3 | |
261 | | | | | | OpenBSD 5.1 |
262 | | | Mac OS X | `----. | |
264 | | | | NetBSD 6.0 | | |
265 | | | | | | | | OpenBSD 5.2 DragonFly 3.2.1
266 | FreeBSD | | | | | NetBSD | |
267 | 9.1 | | | | | 5.2 | |
269 | | | | | | | NetBSD | |
270 | | | | | | | 5.2.1 | |
273 | | | | | | NetBSD | |
274 | | | | | | 6.0.1 | |
276 | | | | | | NetBSD | |
277 | | | | | | 6.0.2 | |
278 | | | | | | | OpenBSD 5.3 DragonFly 3.4.1
279 | | | | | | NetBSD | |
280 | | | | | | 6.0.3 | |
282 | | | | | | NetBSD | |
283 | | | | | | 6.0.4 | |
285 | | | | | | NetBSD | |
286 | | | | | | 6.0.5 | |
288 | | | | | |`-NetBSD 6.1 | |
289 | | FreeBSD | | | | |
290 | | 8.4 | | NetBSD 6.1.1 | |
292 | FreeBSD | | NetBSD 6.1.2 | |
293 | 9.2 Mac OS X | | | |
294 | | 10.9 | | OpenBSD 5.4 |
295 | `-----. | | | | DragonFly 3.6.0
297 *--FreeBSD | | | NetBSD 6.1.3 | |
299 | | | | | | | DragonFly 3.6.1
302 | | | | | | | DragonFly 3.6.2
303 | | | | | NetBSD 6.1.4 | |
305 | | | | | | OpenBSD 5.5 |
307 | | | | | | | DragonFly 3.8.0
310 | | | | | | | DragonFly 3.8.1
313 | | | | | | | DragonFly 3.6.3
315 | | FreeBSD | | | | |
317 | | | | NetBSD 6.1.5 | DragonFly 3.8.2
320 | | | | OpenBSD 5.6 |
322 | 10.1 | | | DragonFly 4.0.1
328 FreeBSD 11 -current | NetBSD -current OpenBSD -current DragonFly -current
335 Time tolerance +/- 6 months, depending on which book/article you read; if it
336 was the announcement in Usenet or if it was available as tape.
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
365 First Edition 1971-11-03 [QCU]
366 DEC PDP-11/20, Assembler
367 Second Edition 1972-06-12 [QCU]
368 10 UNIX installations
369 Third Edition 1973-02-xx [QCU]
370 Pipes, 16 installations
371 Fourth Edition 1973-11-xx [QCU]
372 rewriting in C effected,
373 above 30 installations
374 Fifth Edition 1974-06-xx [QCU]
375 above 50 installations
376 Sixth Edition 1975-05-xx [QCU]
378 Seventh Edition 1979-01-xx [QCU]
380 Eighth 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
387 Ninth Edition 1986-09-xx [QCU]
388 Tenth Edition 1989-10-xx [QCU]
392 PDP-11, Pascal, ex(1)
393 30 free copies of 1BSD sent out
394 35 tapes sold for 50 USD [QCU]
395 2BSD mid 1978 [QCU] 1979-05-10 [TUHS]
396 75 2BSD tapes shipped
397 2.79BSD 1980-04-xx [TUHS]
398 2.8BSD 1981-07-xx [KSJ]
400 2.8.1BSD 1982-01-xx [QCU]
401 set of performance improvements
402 2.9BSD 1983-07-xx [KSJ]
403 2.9.1BSD 1983-11-xx [TUHS]
404 2.9BSD-Seismo 1985-08-xx [SMS]
405 2.10BSD 1987-04-xx [KKK]
406 2.10.1BSD 1989-01-xx [SMS]
407 2.11BSD 1992-02-xx [SMS]
408 2.11BSD rev #430 1999-12-13 [SMS]
410 32V 1978-1[01]-xx [QCU]
411 3BSD late 1979 [QCU] March 1980 [TUHS]
412 virtual memory, page replacement,
415 4.1BSD 1981-07-08 [DOC]
417 alpha release, 100 sites, networking [44B]
418 4.1bBSD internal release, fast filesystem [44B]
420 beta release, IPC [44B]
421 4.2BSD 1983-09-xx [QCU]
423 4.3BSD 1986-06-xx [QCU]
424 1986-04-05 [KB], [DOC]
425 4.3BSD Tahoe 1988-06-15 [QCU], [DOC]
426 4.3BSD NET/1 1988-11-xx [QCU]
428 4.3BSD Reno 1990-06-29 [QCU], [DOC]
429 4.3BSD NET/2 1991-06-28 [QCU], [DOC]
431 BSD/386 ALPHA 1991-12-xx [BSDI]
432 first code released to people outside BSDI
433 386BSD 0.0 1992-02-xx [DOC]
434 BSD/386 0.3.1 1992-04-xx [BSDI] first ext. beta; B customers
435 BSD/386 0.3.3 1992-06-xx [BSDI] first CDROM version
436 386BSD 0.1 1992-07-28 [DOC]
437 4.4BSD Alpha 1992-07-07
438 BSD/386 0.9.3 1992-10-xx [BSDI]
439 first external gamma; G customers
440 BSD/386 0.9.4 1992-12-xx [BSDI]
441 would have been 1.0 except for request
442 for preliminary injunction
443 BSD/386 1.0 1993-03-xx [BSDI]
444 injunction denied; first official release
445 NetBSD 0.8 1993-04-20 [NBD]
446 4.4BSD 1993-06-01 [USE]
447 NetBSD 0.9 1993-08-23 [NBD]
448 FreeBSD 1.0 1993-11-01 [FBD]
449 FreeBSD 1.0.2 1993-11-14 [FBD]
450 supersedes 1.0 13 days after release.
451 BSD/386 1.1 1994-02-xx [BSDI]
452 4.4BSD Lite 1994-03-01 [USE]
453 FreeBSD 1.1 1994-05-07 [FBD]
454 FreeBSD 1.1.5 1994-06-30 [FBD]
455 FreeBSD 1.1.5.1 1994-07-05 [FBD]
456 supersedes 1.1.5 5 days after release.
457 NetBSD 1.0 1994-10-26 [NBD]
458 386BSD 1.0 1994-11-12 [USE]
459 FreeBSD 2.0 1994-11-23 [FBD]
460 BSD/OS 2.0 1995-01-xx [BSDI] 4.4 lite based
461 FreeBSD 2.0.5 1995-06-10 [FBD]
462 BSD/OS 2.0.1 1995-06-xx [BSDI]
463 4.4BSD Lite Release 2 1995-06-xx [44B]
464 the true final distribution from the CSRG
465 FreeBSD 2.1.0 1995-11-19 [FBD]
466 NetBSD 1.1 1995-11-26 [NBD]
467 BSD/OS 2.1 1996-01-xx [BSDI]
468 FreeBSD 2.1.5 1996-07-14 [FBD]
469 NetBSD 1.2 1996-10-04 [NBD]
470 OpenBSD 2.0 1996-10-18 [OBD]
471 FreeBSD 2.1.6 1996-11-16 [FBD]
472 FreeBSD 2.1.6.1 1996-11-25 [FBD] (sendmail security release)
474 FreeBSD 2.1.7 1997-02-20 [FBD]
475 BSD/OS 3.0 1997-02-xx [BSDI] 4.4 lite2 based
476 FreeBSD 2.2.0 1997-03-16 [FBD]
477 FreeBSD 2.2.1 1997-03-25 [FBD]
478 FreeBSD 2.2.2 1997-05-16 [FBD]
479 NetBSD 1.2.1 1997-05-20 [NBD] (patch release)
480 OpenBSD 2.1 1997-06-01 [OBD]
481 FreeBSD 2.2.5 1997-10-22 [FBD]
482 OpenBSD 2.2 1997-12-01 [OBD]
483 NetBSD 1.3 1998-01-04 [NBD]
484 FreeBSD 2.2.6 1998-03-25 [FBD]
485 NetBSD 1.3.1 1998-03-09 [NBD] (patch release)
486 BSD/OS 3.1 1998-03-xx [BSDI]
487 OpenBSD 2.3 1998-05-19 [OBD]
488 NetBSD 1.3.2 1998-05-29 [NBD] (patch release)
489 FreeBSD 2.2.7 1998-07-22 [FBD]
490 BSD/OS 4.0 1998-08-xx [BSDI]
491 2-lock MP support, ELF executables
492 FreeBSD 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
496 FreeBSD 2.2.8 1998-11-29 [FBD]
497 OpenBSD 2.4 1998-12-01 [OBD]
498 NetBSD 1.3.3 1998-12-23 [NBD] (patch release)
499 FreeBSD 3.1 1999-02-15 [FBD]
500 BSD/OS 4.0.1 1999-03-xx [BSDI]
501 NetBSD 1.4 1999-05-12 [NBD]
502 FreeBSD 3.2 1999-05-17 [FBD]
503 OpenBSD 2.5 1999-05-19 [OBD]
504 NetBSD 1.4.1 1999-08-26 [NBD] (patch release)
505 FreeBSD 3.3 1999-09-17 [FBD]
506 OpenBSD 2.6 1999-12-01 [OBD]
507 FreeBSD 3.4 1999-12-20 [FBD]
508 BSD/OS 4.1 1999-12-xx [BSDI]
509 FreeBSD 4.0 2000-03-13 [FBD]
510 NetBSD 1.4.2 2000-03-19 [NBD] (patch release)
511 OpenBSD 2.7 2000-06-15 [OBD]
512 FreeBSD 3.5 2000-06-24 [FBD]
513 FreeBSD 4.1 2000-07-27 [FBD]
514 FreeBSD 3.5.1 2000-07-28 [FBD]
515 FreeBSD 4.1.1 2000-09-25 [FBD] (a network-only patch release)
516 FreeBSD 4.2 2000-11-21 [FBD]
517 NetBSD 1.4.3 2000-11-25 [NBD] (patch release)
518 BSD/OS 4.2 2000-11-29 [BSDI]
519 OpenBSD 2.8 2000-12-01 [OBD]
520 NetBSD 1.5 2000-12-06 [NBD]
521 Mac OS X 10.0 2001-03-24 [APL]
522 FreeBSD 4.3 2001-04-20 [FBD]
523 OpenBSD 2.9 2001-06-01 [OBD]
524 NetBSD 1.5.1 2001-07-11 [NBD] (patch release)
525 NetBSD 1.5.2 2001-09-13 [NBD] (patch release)
526 FreeBSD 4.4 2001-09-18 [FBD]
527 Mac OS X 10.1 2001-09-29 [APL]
528 OpenBSD 3.0 2001-12-01 [OBD]
529 FreeBSD 4.5 2002-01-29 [FBD]
530 BSD/OS 4.3 2002-03-14 [WRS]
531 OpenBSD 3.1 2002-05-19 [OBD]
532 FreeBSD 4.6 2002-06-15 [FBD]
533 NetBSD 1.5.3 2002-07-22 [NBD] (patch release)
534 FreeBSD 4.6.2 2002-08-15 [FBD] (patch release)
535 Mac OS X 10.2 2002-08-23 [APL]
536 NetBSD 1.6 2002-09-14 [NBD]
537 FreeBSD 4.7 2002-10-08 [FBD]
538 OpenBSD 3.2 2002-11-01 [OBD]
539 FreeBSD 5.0 2003-01-17 [FBD]
540 FreeBSD 5.0 is a separate branch off of
541 -current, similar to 3.0.
542 FreeBSD 4.8 2003-04-03 [FBD]
543 NetBSD 1.6.1 2003-04-21 [NBD] (patch release)
544 OpenBSD 3.3 2003-05-01 [OBD]
545 BSD/OS 5.0 2003-05-?? [WRS]
546 FreeBSD 5.1 2003-06-09 [FBD]
547 Mac OS X 10.3 2003-10-24 [APL]
548 FreeBSD 4.9 2003-10-28 [FBD]
549 BSD/OS 5.1 ISE 2003-10-?? [WRS] (final version)
550 OpenBSD 3.4 2003-11-01 [OBD]
551 FreeBSD 5.2 2004-01-12 [FBD]
552 FreeBSD 5.2.1 2004-02-22 [FBD] (patch release)
553 NetBSD 1.6.2 2004-03-01 [NBD] (patch release)
554 OpenBSD 3.5 2004-04-01 [OBD]
555 FreeBSD 4.10 2004-05-27 [FBD]
556 DragonFly 1.0 2004-07-12 [DFB]
557 OpenBSD 3.6 2004-10-29 [OBD]
558 FreeBSD 5.3 2004-11-06 [FBD]
559 NetBSD 2.0 2004-12-09 [NBD]
560 FreeBSD 4.11 2005-01-25 [FBD]
561 DragonFly 1.2.0 2005-04-08 [DFB]
562 NetBSD 2.0.2 2005-04-14 [NBD] (security/critical release)
563 Mac OS X 10.4 2005-04-29 [APL]
564 FreeBSD 5.4 2005-05-09 [FBD]
565 OpenBSD 3.7 2005-05-19 [OBD]
566 NetBSD 2.0.3 2005-10-31 [NBD] (security/critical release)
567 OpenBSD 3.8 2005-11-01 [OBD]
568 FreeBSD 6.0 2005-11-01 [FBD]
569 NetBSD 2.1 2005-11-02 [NBD]
570 NetBSD 3.0 2005-12-23 [NBD]
571 DragonFly 1.4.0 2006-01-08 [DFB]
572 FreeBSD 2.2.9 2006-04-01 [FBD]
573 OpenBSD 3.9 2006-05-01 [OBD]
574 FreeBSD 6.1 2006-05-08 [FBD]
575 FreeBSD 5.5 2006-05-25 [FBD]
576 NetBSD 3.0.1 2006-07-24 [NBD] (security/critical release)
577 DragonFly 1.6.0 2006-07-24 [DFB]
578 OpenBSD 4.0 2006-11-01 [OBD]
579 NetBSD 3.0.2 2006-11-04 [NBD] (security/critical release)
580 NetBSD 3.1 2006-11-04 [NBD]
581 FreeBSD 6.2 2007-01-15 [FBD]
582 DragonFly 1.8.0 2007-01-30 [DFB]
583 OpenBSD 4.1 2007-05-01 [OBD]
584 DragonFly 1.10.0 2007-08-06 [DFB]
585 Mac OS X 10.5 2007-10-26 [APL]
586 OpenBSD 4.2 2007-11-01 [OBD]
587 NetBSD 4.0 2007-12-19 [NBD]
588 FreeBSD 6.3 2008-01-18 [FBD]
589 DragonFly 1.12.0 2008-02-26 [DFB]
590 FreeBSD 7.0 2008-02-27 [FBD]
591 OpenBSD 4.3 2008-05-01 [OBD]
592 DragonFly 2.0.0 2008-07-21 [DFB]
593 OpenBSD 4.4 2008-11-01 [OBD]
594 FreeBSD 6.4 2008-11-28 [FBD]
595 FreeBSD 7.1 2009-01-04 [FBD]
596 DragonFly 2.2.0 2009-02-17 [DFB]
597 NetBSD 5.0 2009-04-29 [NBD]
598 OpenBSD 4.5 2009-05-01 [OBD]
599 FreeBSD 7.2 2009-05-04 [FBD]
600 Mac OS X 10.6 2009-06-08 [APL]
601 NetBSD 5.0.1 2009-08-02 [NBD] (security/critical release)
602 DragonFly 2.4.0 2009-09-16 [DFB]
603 OpenBSD 4.6 2009-10-18 [OBD]
604 FreeBSD 8.0 2009-11-26 [FBD]
605 NetBSD 5.0.2 2010-02-12 [NBD] (security/critical release)
606 FreeBSD 7.3 2010-03-23 [FBD]
607 DragonFly 2.6.0 2010-03-28 [DFB]
608 OpenBSD 4.7 2010-05-19 [OBD]
609 FreeBSD 8.1 2010-07-24 [FBD]
610 DragonFly 2.8.2 2010-10-30 [DFB]
611 OpenBSD 4.8 2010-11-01 [OBD]
612 NetBSD 5.1 2010-11-19 [NBD]
613 FreeBSD 7.4 2011-02-24 [FBD]
614 FreeBSD 8.2 2011-02-24 [FBD]
615 DragonFly 2.10.1 2011-04-26 [DFB]
616 OpenBSD 4.9 2011-05-01 [OBD]
617 Mac OS X 10.7 2011-07-20 [APL]
618 OpenBSD 5.0 2011-11-01 [OBD]
619 FreeBSD 9.0 2012-01-12 [FBD]
620 NetBSD 5.1.2 2012-02-02 [NBD] (security/critical release)
621 DragonFly 3.0.1 2012-02-21 [DFB]
622 FreeBSD 8.3 2012-04-18 [FBD]
623 OpenBSD 5.1 2012-05-01 [OBD]
624 Mac OS X 10.8 2012-07-25 [APL]
625 NetBSD 6.0 2012-10-17 [NBD]
626 OpenBSD 5.2 2012-11-01 [OBD]
627 DragonFly 3.2.1 2012-11-02 [DFB]
628 NetBSD 5.2 2012-12-03 [NBD]
629 NetBSD 6.0.1 2012-12-26 [NBD] (security/critical release)
630 FreeBSD 9.1 2012-12-30 [FBD]
631 DragonFly 3.4.1 2013-04-29 [DFB]
632 OpenBSD 5.3 2013-05-01 [OBD]
633 NetBSD 6.0.2 2013-05-18 [NBD] (security/critical release)
634 NetBSD 6.1 2013-05-18 [NBD]
635 FreeBSD 8.4 2013-06-07 [FBD]
636 NetBSD 6.1.1 2013-08-22 [NBD]
637 NetBSD 5.1.3 2013-09-29 [NBD]
638 NetBSD 5.2.1 2013-09-29 [NBD]
639 FreeBSD 9.2 2013-09-30 [FBD]
640 NetBSD 6.0.3 2013-09-30 [NBD]
641 NetBSD 6.1.2 2013-09-30 [NBD]
642 Mac OS X 10.9 2013-10-22 [APL]
643 OpenBSD 5.4 2013-11-01 [OBD]
644 DragonFly 3.6.0 2013-11-25 [DFB]
645 FreeBSD 10.0 2014-01-20 [FBD]
646 NetBSD 6.0.4 2014-01-27 [NBD]
647 NetBSD 6.1.3 2014-01-27 [NBD]
648 DragonFly 3.6.1 2014-02-22 [DFB]
649 DragonFly 3.6.2 2014-04-10 [DFB]
650 NetBSD 6.0.5 2014-04-19 [NDB]
651 NetBSD 6.1.4 2014-04-19 [NDB]
652 OpenBSD 5.5 2014-05-01 [OBD]
653 DragonFly 3.8.0 2014-06-04 [DFB]
654 DragonFly 3.8.1 2014-06-16 [DFB]
655 DragonFly 3.6.3 2014-06-17 [DFB]
656 FreeBSD 9.3 2014-07-05 [FBD]
657 DragonFly 3.8.2 2014-08-08 [DFB]
658 NetBSD 6.1.5 2014-09-22 [NDB]
659 Mac OS X 10.10 2014-10-16 [APL]
660 OpenBSD 5.6 2014-11-01 [OBD]
661 FreeBSD 10.1 2014-11-14 [FBD]
662 DragonFly 4.0.1 2014-11-25 [DFB]
665 ------------------------
667 Leffler, Samuel J., Marshall Kirk McKusick, Michael J Karels and John
668 Quarterman. The Design and Implementation of the 4.3BSD UNIX Operating
669 System. Reading, Mass. Addison-Wesley, 1989. ISBN 0-201-06196-1
671 Salus, Peter H. A quarter century of UNIX. Addison-Wesley Publishing
672 Company, Inc., 1994. ISBN 0-201-54777-5
674 McKusick, Marshall Kirk, Keith Bostic, Michael J Karels, and John
675 Quarterman. The Design and Implementation of the 4.4BSD Operating
676 System. Reading, Mass. Addison-Wesley, 1996. ISBN 0-201-54979-4
678 McKusick, Marshall Kirk, George Neville-Neil. The Design and
679 Implementation of the FreeBSD Operating System.
680 Addison-Wesley Professional, Published: Aug 2, 2004. ISBN 0-201-70245-2
682 Doug McIlroy. Research Unix Reader.
684 Michael G. Brown. The Role of BSD in the Development of Unix.
685 Presented to the Tasmanian Unix Special Interest Group of the
686 Australian Computer Society, Hobart, August 1993.
688 Peter H. Salus. Unix at 25. Byte Magazine, October 1994.
689 URL: http://www.byte.com/art/9410/sec8/art3.htm
691 Andreas Klemm, Lars Köller. If you're going to San Francisco ...
692 Die freien BSD-Varianten von Unix. c't April 1997, page 368ff.
694 BSD Release Announcements collection.
695 URL: http://www.FreeBSD.org/releases/
697 BSD Hypertext Man Pages
698 URL: http://www.FreeBSD.org/cgi/man.cgi
700 UNIX history graphing project
701 URL: http://minnie.tuhs.org/Unix_History/index.html
704 URL: http://www.levenez.com/unix/
706 James Howard: The BSD Family Tree
707 URL: http://ezine.daemonnews.org/200104/bsd_family.html
708 ("what are the differences between FreeBSD, NetBSD, and OpenBSD?")
714 Josh Gilliam for suggestions, bug fixes, and finding very old
715 original BSD announcements from Usenet or tapes.
717 Steven M. Schultz for providing 2.8BSD, 2.10BSD, 2.11BSD manual pages.
720 Copyright (c) 1997-2012 Wolfram Schneider <wosch@FreeBSD.ORG>
721 URL: http://svnweb.freebsd.org/base/head/share/misc/bsd-family-tree