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 |
232 | | | | | DragonFly 2.4.0
233 | | | | OpenBSD 4.6 |
238 | | 7.3 | | | DragonFly 2.6.0
239 | | | | OpenBSD 4.7 |
245 FreeBSD 9 -current | NetBSD -current OpenBSD -current |
252 Time tolerance +/- 6 months, depending on which book/article you read; if it
253 was the announcement in Usenet or if it was available as tape.
255 [44B] McKusick, Marshall Kirk, Keith Bostic, Michael J Karels,
256 and John Quarterman. The Design and Implementation of
257 the 4.4BSD Operating System.
258 [APL] Apple website [http://www.apple.com/macosx/]
259 [BSDI] Berkeley Software Design, Inc.
260 [DFB] DragonFlyBSD Project, The.
261 [DOC] README, COPYRIGHT on tape.
262 [FBD] FreeBSD Project, The.
263 [KB] Keith Bostic. BSD2.10 available from Usenix. comp.unix.sources,
264 Volume 11, Info 4, April, 1987.
265 [KKK] Mike Karels, Kirk McKusick, and Keith Bostic. tahoe announcement.
266 comp.bugs.4bsd.ucb-fixes, June 15, 1988.
267 [KSJ] Michael J. Karels, Carl F. Smith, and William F. Jolitz.
268 Changes in the Kernel in 2.9BSD. Second Berkeley Software
269 Distribution UNIX Version 2.9, July, 1983.
270 [NBD] NetBSD Project, The.
271 [OBD] OpenBSD Project, The.
272 [QCU] Salus, Peter H. A quarter century of UNIX.
273 [SMS] Steven M. Schultz. 2.11BSD, UNIX for the PDP-11.
274 [TUHS] The Unix Historical Society. http://minnie.tuhs.org/Unix_History/.
275 [USE] Usenet announcement.
276 [WRS] Wind River Systems, Inc.
277 [dmr] Dennis Ritchie, via E-Mail
282 First Edition 1971-11-03 [QCU]
283 DEC PDP-11/20, Assembler
284 Second Edition 1972-06-12 [QCU]
285 10 UNIX installations
286 Third Edition 1973-02-xx [QCU]
287 Pipes, 16 installations
288 Fourth Edition 1973-11-xx [QCU]
289 rewriting in C effected,
290 above 30 installations
291 Fifth Edition 1974-06-xx [QCU]
292 above 50 installations
293 Sixth Edition 1975-05-xx [QCU]
295 Seventh Edition 1979-01-xx [QCU]
297 Eighth Edition 1985-02-xx [QCU]
298 VAX 11/750, VAX 11/780 [dmr]
299 descended from 4.1c BSD [dmr]
300 descended from 4.1 BSD [44B]
301 scooping-out and replacement of the character-device
302 and networking part by the streams mechanism
304 Ninth Edition 1986-09-xx [QCU]
305 Tenth Edition 1989-10-xx [QCU]
309 PDP-11, Pascal, ex(1)
310 30 free copies of 1BSD sent out
311 35 tapes sold for 50 USD [QCU]
312 2BSD mid 1978 [QCU] 1979-05-10 [TUHS]
313 75 2BSD tapes shipped
314 2.79BSD 1980-04-xx [TUHS]
315 2.8BSD 1981-07-xx [KSJ]
317 2.8.1BSD 1982-01-xx [QCU]
318 set of performance improvements
319 2.9BSD 1983-07-xx [KSJ]
320 2.9.1BSD 1983-11-xx [TUHS]
321 2.9BSD-Seismo 1985-08-xx [SMS]
322 2.10BSD 1987-04-xx [KKK]
323 2.10.1BSD 1989-01-xx [SMS]
324 2.11BSD 1992-02-xx [SMS]
325 2.11BSD rev #430 1999-12-13 [SMS]
327 32V 1978-1[01]-xx [QCU]
328 3BSD late 1979 [QCU] March 1980 [TUHS]
329 virtual memory, page replacement,
332 4.1BSD 1981-07-08 [DOC]
334 alpha release, 100 sites, networking [44B]
335 4.1bBSD internal release, fast filesystem [44B]
337 beta release, IPC [44B]
338 4.2BSD 1983-09-xx [QCU]
340 4.3BSD 1986-06-xx [QCU]
341 1986-04-05 [KB], [DOC]
342 4.3BSD Tahoe 1988-06-15 [QCU], [DOC]
343 4.3BSD NET/1 1988-11-xx [QCU]
345 4.3BSD Reno 1990-06-29 [QCU], [DOC]
346 4.3BSD NET/2 1991-06-28 [QCU], [DOC]
348 BSD/386 ALPHA 1991-12-xx [BSDI]
349 first code released to people outside BSDI
350 386BSD 0.0 1992-02-xx [DOC]
351 BSD/386 0.3.1 1992-04-xx [BSDI] first ext. beta; B customers
352 BSD/386 0.3.3 1992-06-xx [BSDI] first CDROM version
353 386BSD 0.1 1992-07-28 [DOC]
354 4.4BSD Alpha 1992-07-07
355 BSD/386 0.9.3 1992-10-xx [BSDI]
356 first external gamma; G customers
357 BSD/386 0.9.4 1992-12-xx [BSDI]
358 would have been 1.0 except for request
359 for preliminary injunction
360 BSD/386 1.0 1993-03-xx [BSDI]
361 injunction denied; first official release
362 NetBSD 0.8 1993-04-20 [NBD]
363 4.4BSD 1993-06-01 [USE]
364 NetBSD 0.9 1993-08-23 [NBD]
365 FreeBSD 1.0 1993-11-01 [FBD]
366 FreeBSD 1.0.2 1993-11-14 [FBD]
367 supersedes 1.0 13 days after release.
368 BSD/386 1.1 1994-02-xx [BSDI]
369 4.4BSD Lite 1994-03-01 [USE]
370 FreeBSD 1.1 1994-05-07 [FBD]
371 FreeBSD 1.1.5 1994-06-30 [FBD]
372 FreeBSD 1.1.5.1 1994-07-05 [FBD]
373 supersedes 1.1.5 5 days after release.
374 NetBSD 1.0 1994-10-26 [NBD]
375 386BSD 1.0 1994-11-12 [USE]
376 FreeBSD 2.0 1994-11-23 [FBD]
377 BSD/OS 2.0 1995-01-xx [BSDI] 4.4 lite based
378 FreeBSD 2.0.5 1995-06-10 [FBD]
379 BSD/OS 2.0.1 1995-06-xx [BSDI]
380 4.4BSD Lite Release 2 1995-06-xx [44B]
381 the true final distribution from the CSRG
382 FreeBSD 2.1.0 1995-11-19 [FBD]
383 NetBSD 1.1 1995-11-26 [NBD]
384 BSD/OS 2.1 1996-01-xx [BSDI]
385 FreeBSD 2.1.5 1996-07-14 [FBD]
386 NetBSD 1.2 1996-10-04 [NBD]
387 OpenBSD 2.0 1996-10-18 [OBD]
388 FreeBSD 2.1.6 1996-11-16 [FBD]
389 FreeBSD 2.1.6.1 1996-11-25 [FBD] (sendmail security release)
391 FreeBSD 2.1.7 1997-02-20 [FBD]
392 BSD/OS 3.0 1997-02-xx [BSDI] 4.4 lite2 based
393 FreeBSD 2.2.0 1997-03-16 [FBD]
394 FreeBSD 2.2.1 1997-03-25 [FBD]
395 FreeBSD 2.2.2 1997-05-16 [FBD]
396 NetBSD 1.2.1 1997-05-20 [NBD] (patch release)
397 OpenBSD 2.1 1997-06-01 [OBD]
398 FreeBSD 2.2.5 1997-10-22 [FBD]
399 OpenBSD 2.2 1997-12-01 [OBD]
400 NetBSD 1.3 1998-01-04 [NBD]
401 FreeBSD 2.2.6 1998-03-25 [FBD]
402 NetBSD 1.3.1 1998-03-09 [NBD] (patch release)
403 BSD/OS 3.1 1998-03-xx [BSDI]
404 OpenBSD 2.3 1998-05-19 [OBD]
405 NetBSD 1.3.2 1998-05-29 [NBD] (patch release)
406 FreeBSD 2.2.7 1998-07-22 [FBD]
407 BSD/OS 4.0 1998-08-xx [BSDI]
408 2-lock MP support, ELF executables
409 FreeBSD 3.0 1998-10-16 [FBD]
410 FreeBSD-3.0 is a snapshot from -current,
411 while 3.1 and 3.2 are from 3.x-stable which
412 was branched quite some time after 3.0-release
413 FreeBSD 2.2.8 1998-11-29 [FBD]
414 OpenBSD 2.4 1998-12-01 [OBD]
415 NetBSD 1.3.3 1998-12-23 [NBD] (patch release)
416 FreeBSD 3.1 1999-02-15 [FBD]
417 BSD/OS 4.0.1 1999-03-xx [BSDI]
418 NetBSD 1.4 1999-05-12 [NBD]
419 FreeBSD 3.2 1999-05-17 [FBD]
420 OpenBSD 2.5 1999-05-19 [OBD]
421 NetBSD 1.4.1 1999-08-26 [NBD] (patch release)
422 FreeBSD 3.3 1999-09-17 [FBD]
423 OpenBSD 2.6 1999-12-01 [OBD]
424 FreeBSD 3.4 1999-12-20 [FBD]
425 BSD/OS 4.1 1999-12-xx [BSDI]
426 FreeBSD 4.0 2000-03-13 [FBD]
427 NetBSD 1.4.2 2000-03-19 [NBD] (patch release)
428 OpenBSD 2.7 2000-06-15 [OBD]
429 FreeBSD 3.5 2000-06-24 [FBD]
430 FreeBSD 4.1 2000-07-27 [FBD]
431 FreeBSD 3.5.1 2000-07-28 [FBD]
432 FreeBSD 4.1.1 2000-09-25 [FBD] (a network-only patch release)
433 FreeBSD 4.2 2000-11-21 [FBD]
434 NetBSD 1.4.3 2000-11-25 [NBD] (patch release)
435 BSD/OS 4.2 2000-11-29 [BSDI]
436 OpenBSD 2.8 2000-12-01 [OBD]
437 NetBSD 1.5 2000-12-06 [NBD]
438 Mac OS X 10.0 2001-03-24 [APL]
439 FreeBSD 4.3 2001-04-20 [FBD]
440 OpenBSD 2.9 2001-06-01 [OBD]
441 NetBSD 1.5.1 2001-07-11 [NBD] (patch release)
442 NetBSD 1.5.2 2001-09-13 [NBD] (patch release)
443 FreeBSD 4.4 2001-09-18 [FBD]
444 Mac OS X 10.1 2001-09-29 [APL]
445 OpenBSD 3.0 2001-12-01 [OBD]
446 FreeBSD 4.5 2002-01-29 [FBD]
447 BSD/OS 4.3 2002-03-14 [WRS]
448 OpenBSD 3.1 2002-05-19 [OBD]
449 FreeBSD 4.6 2002-06-15 [FBD]
450 NetBSD 1.5.3 2002-07-22 [NBD] (patch release)
451 FreeBSD 4.6.2 2002-08-15 [FBD] (patch release)
452 Mac OS X 10.2 2002-08-23 [APL]
453 NetBSD 1.6 2002-09-14 [NBD]
454 FreeBSD 4.7 2002-10-08 [FBD]
455 OpenBSD 3.2 2002-11-01 [OBD]
456 FreeBSD 5.0 2003-01-17 [FBD]
457 FreeBSD 5.0 is a separate branch off of
458 -current, similar to 3.0.
459 FreeBSD 4.8 2003-04-03 [FBD]
460 NetBSD 1.6.1 2003-04-21 [NBD] (patch release)
461 OpenBSD 3.3 2003-05-01 [OBD]
462 BSD/OS 5.0 2003-05-?? [WRS]
463 FreeBSD 5.1 2003-06-09 [FBD]
464 Mac OS X 10.3 2003-10-24 [APL]
465 FreeBSD 4.9 2003-10-28 [FBD]
466 BSD/OS 5.1 ISE 2003-10-?? [WRS] (final version)
467 OpenBSD 3.4 2003-11-01 [OBD]
468 FreeBSD 5.2 2004-01-12 [FBD]
469 FreeBSD 5.2.1 2004-02-22 [FBD] (patch release)
470 NetBSD 1.6.2 2004-03-01 [NBD] (patch release)
471 OpenBSD 3.5 2004-04-01 [OBD]
472 FreeBSD 4.10 2004-05-27 [FBD]
473 DragonFly 1.0 2004-07-12 [DFB]
474 OpenBSD 3.6 2004-10-29 [OBD]
475 FreeBSD 5.3 2004-11-06 [FBD]
476 NetBSD 2.0 2004-12-09 [NBD]
477 FreeBSD 4.11 2005-01-25 [FBD]
478 DragonFly 1.2.0 2005-04-08 [DFB]
479 NetBSD 2.0.2 2005-04-14 [NBD] (security/critical release)
480 Mac OS X 10.4 2005-04-29 [APL]
481 FreeBSD 5.4 2005-05-09 [FBD]
482 OpenBSD 3.7 2005-05-19 [OBD]
483 NetBSD 2.0.3 2005-10-31 [NBD] (security/critical release)
484 OpenBSD 3.8 2005-11-01 [OBD]
485 FreeBSD 6.0 2005-11-01 [FBD]
486 NetBSD 2.1 2005-11-02 [NBD]
487 NetBSD 3.0 2005-12-23 [NBD]
488 DragonFly 1.4.0 2006-01-08 [DFB]
489 OpenBSD 3.9 2006-05-01 [OBD]
490 FreeBSD 6.1 2006-05-08 [FBD]
491 FreeBSD 5.5 2006-05-25 [FBD]
492 NetBSD 3.0.1 2006-07-24 [NBD] (security/critical release)
493 DragonFly 1.6.0 2006-07-24 [DFB]
494 OpenBSD 4.0 2006-11-01 [OBD]
495 NetBSD 3.0.2 2006-11-04 [NBD] (security/critical release)
496 NetBSD 3.1 2006-11-04 [NBD]
497 FreeBSD 6.2 2007-01-15 [FBD]
498 DragonFly 1.8.0 2007-01-30 [DFB]
499 OpenBSD 4.1 2007-05-01 [OBD]
500 DragonFly 1.10.0 2007-08-06 [DFB]
501 Mac OS X 10.5 2007-10-26 [APL]
502 OpenBSD 4.2 2007-11-01 [OBD]
503 NetBSD 4.0 2007-12-19 [NBD]
504 FreeBSD 6.3 2008-01-18 [FBD]
505 DragonFly 1.12.0 2008-02-26 [DFB]
506 FreeBSD 7.0 2008-02-27 [FBD]
507 OpenBSD 4.3 2008-05-01 [OBD]
508 DragonFly 2.0.0 2008-07-21 [DFB]
509 OpenBSD 4.4 2008-11-01 [OBD]
510 FreeBSD 6.4 2008-11-28 [FBD]
511 FreeBSD 7.1 2009-01-04 [FBD]
512 DragonFly 2.2.0 2009-02-17 [DFB]
513 NetBSD 5.0 2009-04-29 [NBD]
514 OpenBSD 4.5 2009-05-01 [OBD]
515 FreeBSD 7.2 2009-05-04 [FBD]
516 DragonFly 2.4.0 2009-09-16 [DFB]
517 OpenBSD 4.6 2009-10-18 [OBD]
518 FreeBSD 8.0 2009-11-26 [FBD]
519 FreeBSD 7.3 2010-03-23 [FBD]
520 DragonFly 2.6.0 2010-03-28 [DFB]
521 OpenBSD 4.7 2010-05-19 [OBD]
522 FreeBSD 8.1 2010-07-24 [FBD]
525 ------------------------
527 Leffler, Samuel J., Marshall Kirk McKusick, Michael J Karels and John
528 Quarterman. The Design and Implementation of the 4.3BSD UNIX Operating
529 System. Reading, Mass. Addison-Wesley, 1989. ISBN 0-201-06196-1
531 Salus, Peter H. A quarter century of UNIX. Addison-Wesley Publishing
532 Company, Inc., 1994. ISBN 0-201-54777-5
534 McKusick, Marshall Kirk, Keith Bostic, Michael J Karels, and John
535 Quarterman. The Design and Implementation of the 4.4BSD Operating
536 System. Reading, Mass. Addison-Wesley, 1996. ISBN 0-201-54979-4
538 McKusick, Marshall Kirk, George Neville-Neil. The Design and
539 Implementation of the FreeBSD Operating System.
540 Addison-Wesley Professional, Published: Aug 2, 2004. ISBN 0-201-70245-2
542 Doug McIlroy. Research Unix Reader.
544 Michael G. Brown. The Role of BSD in the Development of Unix.
545 Presented to the Tasmanian Unix Special Interest Group of the
546 Australian Computer Society, Hobart, August 1993.
548 Peter H. Salus. Unix at 25. Byte Magazine, October 1994.
549 URL: http://www.byte.com/art/9410/sec8/art3.htm
551 Andreas Klemm, Lars Köller. If you're going to San Francisco ...
552 Die freien BSD-Varianten von Unix. c't April 1997, page 368ff.
554 BSD Release Announcements collection.
555 URL: http://www.FreeBSD.org/releases/
557 BSD Hypertext Man Pages
558 URL: http://www.FreeBSD.org/cgi/man.cgi
560 UNIX history graphing project
561 URL: http://minnie.tuhs.org/Unix_History/index.html
564 URL: http://www.levenez.com/unix/
566 James Howard: The BSD Family Tree
567 URL: http://ezine.daemonnews.org/200104/bsd_family.html
568 ("what are the differences between FreeBSD, NetBSD, and OpenBSD?")
574 Josh Gilliam for suggestions, bug fixes, and finding very old
575 original BSD announcements from Usenet or tapes.
577 Steven M. Schultz for providing 2.8BSD, 2.10BSD, 2.11BSD manual pages.
580 Copyright (c) 1997-2007 Wolfram Schneider <wosch@FreeBSD.ORG>
581 URL: http://cvsweb.freebsd.org/src/share/misc/bsd-family-tree
583 $FreeBSD: src/share/misc/bsd-family-tree,v 1.139 2010/08/05 18:05:37 maxim Exp $