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 | V 7.3 | | | DragonFly 2.6.0
241 FreeBSD 9 -current | NetBSD -current OpenBSD -current |
248 Time tolerance +/- 6 months, depending on which book/article you read; if it
249 was the announcement in Usenet or if it was available as tape.
251 [44B] McKusick, Marshall Kirk, Keith Bostic, Michael J Karels,
252 and John Quarterman. The Design and Implementation of
253 the 4.4BSD Operating System.
254 [APL] Apple website [http://www.apple.com/macosx/]
255 [BSDI] Berkeley Software Design, Inc.
256 [DFB] DragonFlyBSD Project, The.
257 [DOC] README, COPYRIGHT on tape.
258 [FBD] FreeBSD Project, The.
259 [KB] Keith Bostic. BSD2.10 available from Usenix. comp.unix.sources,
260 Volume 11, Info 4, April, 1987.
261 [KKK] Mike Karels, Kirk McKusick, and Keith Bostic. tahoe announcement.
262 comp.bugs.4bsd.ucb-fixes, June 15, 1988.
263 [KSJ] Michael J. Karels, Carl F. Smith, and William F. Jolitz.
264 Changes in the Kernel in 2.9BSD. Second Berkeley Software
265 Distribution UNIX Version 2.9, July, 1983.
266 [NBD] NetBSD Project, The.
267 [OBD] OpenBSD Project, The.
268 [QCU] Salus, Peter H. A quarter century of UNIX.
269 [SMS] Steven M. Schultz. 2.11BSD, UNIX for the PDP-11.
270 [TUHS] The Unix Historical Society. http://minnie.tuhs.org/Unix_History/.
271 [USE] Usenet announcement.
272 [WRS] Wind River Systems, Inc.
273 [dmr] Dennis Ritchie, via E-Mail
278 First Edition 1971-11-03 [QCU]
279 DEC PDP-11/20, Assembler
280 Second Edition 1972-06-12 [QCU]
281 10 UNIX installations
282 Third Edition 1973-02-xx [QCU]
283 Pipes, 16 installations
284 Fourth Edition 1973-11-xx [QCU]
285 rewriting in C effected,
286 above 30 installations
287 Fifth Edition 1974-06-xx [QCU]
288 above 50 installations
289 Sixth Edition 1975-05-xx [QCU]
291 Seventh Edition 1979-01-xx [QCU]
293 Eighth Edition 1985-02-xx [QCU]
294 VAX 11/750, VAX 11/780 [dmr]
295 descended from 4.1c BSD [dmr]
296 descended from 4.1 BSD [44B]
297 scooping-out and replacement of the character-device
298 and networking part by the streams mechanism
300 Ninth Edition 1986-09-xx [QCU]
301 Tenth Edition 1989-10-xx [QCU]
305 PDP-11, Pascal, ex(1)
306 30 free copies of 1BSD sent out
307 35 tapes sold for 50 USD [QCU]
308 2BSD mid 1978 [QCU] 1979-05-10 [TUHS]
309 75 2BSD tapes shipped
310 2.79BSD 1980-04-xx [TUHS]
311 2.8BSD 1981-07-xx [KSJ]
313 2.8.1BSD 1982-01-xx [QCU]
314 set of performance improvements
315 2.9BSD 1983-07-xx [KSJ]
316 2.9.1BSD 1983-11-xx [TUHS]
317 2.9BSD-Seismo 1985-08-xx [SMS]
318 2.10BSD 1987-04-xx [KKK]
319 2.10.1BSD 1989-01-xx [SMS]
320 2.11BSD 1992-02-xx [SMS]
321 2.11BSD rev #430 1999-12-13 [SMS]
323 32V 1978-1[01]-xx [QCU]
324 3BSD late 1979 [QCU] March 1980 [TUHS]
325 virtual memory, page replacement,
328 4.1BSD 1981-07-08 [DOC]
330 alpha release, 100 sites, networking [44B]
331 4.1bBSD internal release, fast filesystem [44B]
333 beta release, IPC [44B]
334 4.2BSD 1983-09-xx [QCU]
336 4.3BSD 1986-06-xx [QCU]
337 1986-04-05 [KB], [DOC]
338 4.3BSD Tahoe 1988-06-15 [QCU], [DOC]
339 4.3BSD NET/1 1988-11-xx [QCU]
341 4.3BSD Reno 1990-06-29 [QCU], [DOC]
342 4.3BSD NET/2 1991-06-28 [QCU], [DOC]
344 BSD/386 ALPHA 1991-12-xx [BSDI]
345 first code released to people outside BSDI
346 386BSD 0.0 1992-02-xx [DOC]
347 BSD/386 0.3.1 1992-04-xx [BSDI] first ext. beta; B customers
348 BSD/386 0.3.3 1992-06-xx [BSDI] first CDROM version
349 386BSD 0.1 1992-07-28 [DOC]
350 4.4BSD Alpha 1992-07-07
351 BSD/386 0.9.3 1992-10-xx [BSDI]
352 first external gamma; G customers
353 BSD/386 0.9.4 1992-12-xx [BSDI]
354 would have been 1.0 except for request
355 for preliminary injunction
356 BSD/386 1.0 1993-03-xx [BSDI]
357 injunction denied; first official release
358 NetBSD 0.8 1993-04-20 [NBD]
359 4.4BSD 1993-06-01 [USE]
360 NetBSD 0.9 1993-08-23 [NBD]
361 FreeBSD 1.0 1993-11-01 [FBD]
362 FreeBSD 1.0.2 1993-11-14 [FBD]
363 supersedes 1.0 13 days after release.
364 BSD/386 1.1 1994-02-xx [BSDI]
365 4.4BSD Lite 1994-03-01 [USE]
366 FreeBSD 1.1 1994-05-07 [FBD]
367 FreeBSD 1.1.5 1994-06-30 [FBD]
368 FreeBSD 1.1.5.1 1994-07-05 [FBD]
369 supersedes 1.1.5 5 days after release.
370 NetBSD 1.0 1994-10-26 [NBD]
371 386BSD 1.0 1994-11-12 [USE]
372 FreeBSD 2.0 1994-11-23 [FBD]
373 BSD/OS 2.0 1995-01-xx [BSDI] 4.4 lite based
374 FreeBSD 2.0.5 1995-06-10 [FBD]
375 BSD/OS 2.0.1 1995-06-xx [BSDI]
376 4.4BSD Lite Release 2 1995-06-xx [44B]
377 the true final distribution from the CSRG
378 FreeBSD 2.1.0 1995-11-19 [FBD]
379 NetBSD 1.1 1995-11-26 [NBD]
380 BSD/OS 2.1 1996-01-xx [BSDI]
381 FreeBSD 2.1.5 1996-07-14 [FBD]
382 NetBSD 1.2 1996-10-04 [NBD]
383 OpenBSD 2.0 1996-10-18 [OBD]
384 FreeBSD 2.1.6 1996-11-16 [FBD]
385 FreeBSD 2.1.6.1 1996-11-25 [FBD] (sendmail security release)
387 FreeBSD 2.1.7 1997-02-20 [FBD]
388 BSD/OS 3.0 1997-02-xx [BSDI] 4.4 lite2 based
389 FreeBSD 2.2.0 1997-03-16 [FBD]
390 FreeBSD 2.2.1 1997-03-25 [FBD]
391 FreeBSD 2.2.2 1997-05-16 [FBD]
392 NetBSD 1.2.1 1997-05-20 [NBD] (patch release)
393 OpenBSD 2.1 1997-06-01 [OBD]
394 FreeBSD 2.2.5 1997-10-22 [FBD]
395 OpenBSD 2.2 1997-12-01 [OBD]
396 NetBSD 1.3 1998-01-04 [NBD]
397 FreeBSD 2.2.6 1998-03-25 [FBD]
398 NetBSD 1.3.1 1998-03-09 [NBD] (patch release)
399 BSD/OS 3.1 1998-03-xx [BSDI]
400 OpenBSD 2.3 1998-05-19 [OBD]
401 NetBSD 1.3.2 1998-05-29 [NBD] (patch release)
402 FreeBSD 2.2.7 1998-07-22 [FBD]
403 BSD/OS 4.0 1998-08-xx [BSDI]
404 2-lock MP support, ELF executables
405 FreeBSD 3.0 1998-10-16 [FBD]
406 FreeBSD-3.0 is a snapshot from -current,
407 while 3.1 and 3.2 are from 3.x-stable which
408 was branched quite some time after 3.0-release
409 FreeBSD 2.2.8 1998-11-29 [FBD]
410 OpenBSD 2.4 1998-12-01 [OBD]
411 NetBSD 1.3.3 1998-12-23 [NBD] (patch release)
412 FreeBSD 3.1 1999-02-15 [FBD]
413 BSD/OS 4.0.1 1999-03-xx [BSDI]
414 NetBSD 1.4 1999-05-12 [NBD]
415 FreeBSD 3.2 1999-05-17 [FBD]
416 OpenBSD 2.5 1999-05-19 [OBD]
417 NetBSD 1.4.1 1999-08-26 [NBD] (patch release)
418 FreeBSD 3.3 1999-09-17 [FBD]
419 OpenBSD 2.6 1999-12-01 [OBD]
420 FreeBSD 3.4 1999-12-20 [FBD]
421 BSD/OS 4.1 1999-12-xx [BSDI]
422 FreeBSD 4.0 2000-03-13 [FBD]
423 NetBSD 1.4.2 2000-03-19 [NBD] (patch release)
424 OpenBSD 2.7 2000-06-15 [OBD]
425 FreeBSD 3.5 2000-06-24 [FBD]
426 FreeBSD 4.1 2000-07-27 [FBD]
427 FreeBSD 3.5.1 2000-07-28 [FBD]
428 FreeBSD 4.1.1 2000-09-25 [FBD] (a network-only patch release)
429 FreeBSD 4.2 2000-11-21 [FBD]
430 NetBSD 1.4.3 2000-11-25 [NBD] (patch release)
431 BSD/OS 4.2 2000-11-29 [BSDI]
432 OpenBSD 2.8 2000-12-01 [OBD]
433 NetBSD 1.5 2000-12-06 [NBD]
434 Mac OS X 10.0 2001-03-24 [APL]
435 FreeBSD 4.3 2001-04-20 [FBD]
436 OpenBSD 2.9 2001-06-01 [OBD]
437 NetBSD 1.5.1 2001-07-11 [NBD] (patch release)
438 NetBSD 1.5.2 2001-09-13 [NBD] (patch release)
439 FreeBSD 4.4 2001-09-18 [FBD]
440 Mac OS X 10.1 2001-09-29 [APL]
441 OpenBSD 3.0 2001-12-01 [OBD]
442 FreeBSD 4.5 2002-01-29 [FBD]
443 BSD/OS 4.3 2002-03-14 [WRS]
444 OpenBSD 3.1 2002-05-19 [OBD]
445 FreeBSD 4.6 2002-06-15 [FBD]
446 NetBSD 1.5.3 2002-07-22 [NBD] (patch release)
447 FreeBSD 4.6.2 2002-08-15 [FBD] (patch release)
448 Mac OS X 10.2 2002-08-23 [APL]
449 NetBSD 1.6 2002-09-14 [NBD]
450 FreeBSD 4.7 2002-10-08 [FBD]
451 OpenBSD 3.2 2002-11-01 [OBD]
452 FreeBSD 5.0 2003-01-17 [FBD]
453 FreeBSD 5.0 is a separate branch off of
454 -current, similar to 3.0.
455 FreeBSD 4.8 2003-04-03 [FBD]
456 NetBSD 1.6.1 2003-04-21 [NBD] (patch release)
457 OpenBSD 3.3 2003-05-01 [OBD]
458 BSD/OS 5.0 2003-05-?? [WRS]
459 FreeBSD 5.1 2003-06-09 [FBD]
460 Mac OS X 10.3 2003-10-24 [APL]
461 FreeBSD 4.9 2003-10-28 [FBD]
462 BSD/OS 5.1 ISE 2003-10-?? [WRS] (final version)
463 OpenBSD 3.4 2003-11-01 [OBD]
464 FreeBSD 5.2 2004-01-12 [FBD]
465 FreeBSD 5.2.1 2004-02-22 [FBD] (patch release)
466 NetBSD 1.6.2 2004-03-01 [NBD] (patch release)
467 OpenBSD 3.5 2004-04-01 [OBD]
468 FreeBSD 4.10 2004-05-27 [FBD]
469 DragonFly 1.0 2004-07-12 [DFB]
470 OpenBSD 3.6 2004-10-29 [OBD]
471 FreeBSD 5.3 2004-11-06 [FBD]
472 NetBSD 2.0 2004-12-09 [NBD]
473 FreeBSD 4.11 2005-01-25 [FBD]
474 DragonFly 1.2.0 2005-04-08 [DFB]
475 NetBSD 2.0.2 2005-04-14 [NBD] (security/critical release)
476 Mac OS X 10.4 2005-04-29 [APL]
477 FreeBSD 5.4 2005-05-09 [FBD]
478 OpenBSD 3.7 2005-05-19 [OBD]
479 NetBSD 2.0.3 2005-10-31 [NBD] (security/critical release)
480 OpenBSD 3.8 2005-11-01 [OBD]
481 FreeBSD 6.0 2005-11-01 [FBD]
482 NetBSD 2.1 2005-11-02 [NBD]
483 NetBSD 3.0 2005-12-23 [NBD]
484 DragonFly 1.4.0 2006-01-08 [DFB]
485 OpenBSD 3.9 2006-05-01 [OBD]
486 FreeBSD 6.1 2006-05-08 [FBD]
487 FreeBSD 5.5 2006-05-25 [FBD]
488 NetBSD 3.0.1 2006-07-24 [NBD] (security/critical release)
489 DragonFly 1.6.0 2006-07-24 [DFB]
490 OpenBSD 4.0 2006-11-01 [OBD]
491 NetBSD 3.0.2 2006-11-04 [NBD] (security/critical release)
492 NetBSD 3.1 2006-11-04 [NBD]
493 FreeBSD 6.2 2007-01-15 [FBD]
494 DragonFly 1.8.0 2007-01-30 [DFB]
495 OpenBSD 4.1 2007-05-01 [OBD]
496 DragonFly 1.10.0 2007-08-06 [DFB]
497 Mac OS X 10.5 2007-10-26 [APL]
498 OpenBSD 4.2 2007-11-01 [OBD]
499 NetBSD 4.0 2007-12-19 [NBD]
500 FreeBSD 6.3 2008-01-18 [FBD]
501 DragonFly 1.12.0 2008-02-26 [DFB]
502 FreeBSD 7.0 2008-02-27 [FBD]
503 OpenBSD 4.3 2008-05-01 [OBD]
504 DragonFly 2.0.0 2008-07-21 [DFB]
505 OpenBSD 4.4 2008-11-01 [OBD]
506 FreeBSD 6.4 2008-11-28 [FBD]
507 FreeBSD 7.1 2009-01-04 [FBD]
508 DragonFly 2.2.0 2009-02-17 [DFB]
509 NetBSD 5.0 2009-04-29 [NBD]
510 OpenBSD 4.5 2009-05-01 [OBD]
511 FreeBSD 7.2 2009-05-04 [FBD]
512 DragonFly 2.4.0 2009-09-16 [DFB]
513 OpenBSD 4.6 2009-10-18 [OBD]
514 FreeBSD 8.0 2009-11-26 [FBD]
515 FreeBSD 7.3 2010-03-23 [FBD]
516 DragonFly 2.6.0 2010-03-28 [DFB]
517 OpenBSD 4.7 2010-05-19 [OBD]
520 ------------------------
522 Leffler, Samuel J., Marshall Kirk McKusick, Michael J Karels and John
523 Quarterman. The Design and Implementation of the 4.3BSD UNIX Operating
524 System. Reading, Mass. Addison-Wesley, 1989. ISBN 0-201-06196-1
526 Salus, Peter H. A quarter century of UNIX. Addison-Wesley Publishing
527 Company, Inc., 1994. ISBN 0-201-54777-5
529 McKusick, Marshall Kirk, Keith Bostic, Michael J Karels, and John
530 Quarterman. The Design and Implementation of the 4.4BSD Operating
531 System. Reading, Mass. Addison-Wesley, 1996. ISBN 0-201-54979-4
533 McKusick, Marshall Kirk, George Neville-Neil. The Design and
534 Implementation of the FreeBSD Operating System.
535 Addison-Wesley Professional, Published: Aug 2, 2004. ISBN 0-201-70245-2
537 Doug McIlroy. Research Unix Reader.
539 Michael G. Brown. The Role of BSD in the Development of Unix.
540 Presented to the Tasmanian Unix Special Interest Group of the
541 Australian Computer Society, Hobart, August 1993.
543 Peter H. Salus. Unix at 25. Byte Magazine, October 1994.
544 URL: http://www.byte.com/art/9410/sec8/art3.htm
546 Andreas Klemm, Lars Köller. If you're going to San Francisco ...
547 Die freien BSD-Varianten von Unix. c't April 1997, page 368ff.
549 BSD Release Announcements collection.
550 URL: http://www.FreeBSD.org/releases/
552 BSD Hypertext Man Pages
553 URL: http://www.FreeBSD.org/cgi/man.cgi
555 UNIX history graphing project
556 URL: http://minnie.tuhs.org/Unix_History/index.html
559 URL: http://www.levenez.com/unix/
561 James Howard: The BSD Family Tree
562 URL: http://ezine.daemonnews.org/200104/bsd_family.html
563 ("what are the differences between FreeBSD, NetBSD, and OpenBSD?")
569 Josh Gilliam for suggestions, bug fixes, and finding very old
570 original BSD announcements from Usenet or tapes.
572 Steven M. Schultz for providing 2.8BSD, 2.10BSD, 2.11BSD manual pages.
575 Copyright (c) 1997-2007 Wolfram Schneider <wosch@FreeBSD.ORG>
576 URL: http://cvsweb.freebsd.org/src/share/misc/bsd-family-tree
578 $FreeBSD: src/share/misc/bsd-family-tree,v 1.138 2010/05/20 08:07:25 maxim Exp $