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bsd-family-tree revision 1.37
      1 The UNIX system family tree: Research and BSD
      2 ---------------------------------------------
      3 
      4 First Edition (V1)
      5      |
      6 Second Edition (V2)
      7      |
      8 Third Edition (V3)
      9      |
     10 Fourth Edition (V4)
     11      |
     12 Fifth Edition (V5)
     13      |
     14 Sixth Edition (V6) -----*
     15        \                |
     16         \               |
     17          \              |
     18 Seventh Edition (V7)    |
     19             \           |
     20              \        1BSD
     21              32V        |
     22                \      2BSD---------------*
     23                 \    /                   |
     24                  \  /                    |
     25                   \/                     |
     26                  3BSD                    |
     27                   |                      |
     28                4.0BSD               2.7.9BSD
     29                   |                      |
     30                4.1BSD --------------> 2.8BSD
     31                   |                      |
     32               4.1aBSD -----------\       |
     33                   |                \     |
     34               4.1bBSD                \   |
     35                   |                    \ |
     36       *------ 4.1cBSD --------------> 2.9BSD
     37      /            |                      |
     38 Eighth Edition    |                   2.9BSD-Seismo
     39      |            |                      |
     40      +----<--- 4.2BSD               2.9.1BSD
     41      |            |                      |
     42      +----<--- 4.3BSD -------------> 2.10BSD
     43      |            |               /      |
     44 Ninth Edition     |              / 2.10.1BSD
     45      |         4.3BSD Tahoe-----+        |
     46      |            |              \       |
     47      |            |                \     |
     48      v            |                  2.11BSD
     49 Tenth Edition     |                      |
     50                   |                  2.11BSD rev #430
     51                4.3BSD NET/1              |
     52                   |                      v
     53                4.3BSD Reno
     54                   |
     55    *---------- 4.3BSD NET/2 -------------------+-------------*
     56    |                    |                      |             |
     57 386BSD 0.0              |                      |           BSD/386 ALPHA
     58    |                    |                      |             |
     59 386BSD 0.1 ------------>+                      |           BSD/386 0.3.[13]
     60    |     \              |                  4.4BSD Alpha      |
     61    |     386BSD 1.0     |                      |           BSD/386 0.9.[34]
     62    |                    |                  4.4BSD            |
     63    |                    |                    / |             |
     64    |                    |   4.4BSD-Encumbered  |             |
     65    |               - NetBSD 0.8                |           BSD/386 1.0
     66    |              /     |                      |             |
     67 FreeBSD 1.0 <----'   NetBSD 0.9                |           BSD/386 1.1
     68    |                    |           .----- 4.4BSD Lite       |
     69 FreeBSD 1.1             |          /   /       |     \       |
     70    |                    |         /   /        |      \      |
     71 FreeBSD 1.1.5       .---|--------'   /         |       \     |
     72    |               /    |           /          |        \    |
     73 FreeBSD 1.1.5.1   /     |          /           |         \   |
     74    |             /   NetBSD 1.0 <-'            |          \  |
     75    |            /       |                      |           \ |
     76 FreeBSD 2.0 <--'        |                      |           BSD/OS 2.0
     77    |                     \                     |             |
     78 FreeBSD 2.0.5             \                    |           BSD/OS 2.0.1
     79    |                 .-----\------------- 4.4BSD Lite2       |
     80    |                 |      \             |  |   |   |       |
     81    |                 | .-----|------Rhapsody |   |   |       |
     82    |                 | |     |        NetBSD 1.3 |   |       |
     83    |                 | |     |           OpenBSD 2.3 |       |
     84    |                 | |     |                BSD/OS 3.0     |
     85 FreeBSD 2.1          | |     |                               |
     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       |
     90  |     |             | |     |   \             |             |
     91  | FreeBSD 2.1.6.1   | |     |    \            |             |
     92  |     |             | |     |     \           |             |
     93  | FreeBSD 2.1.7     | |     |      |          |             |
     94  |     |             | |     |  NetBSD 1.2.1   |             |
     95  | FreeBSD 2.1.7.1   | |     |                 |             |
     96  |                   | |     |                 |             |
     97  |                   | |     |                 |             |
     98  *-FreeBSD 2.2       | |     |                 |             |
     99  |        \          | |     |                 |             |
    100  |     FreeBSD 2.2.1 | |     |                 |             |
    101  |         |         | |     |                 |             |
    102  |     FreeBSD 2.2.2 | |     |             OpenBSD 2.1       |
    103  |         |         | |     |                 |             |
    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  |         v         | |     |    |            |             |
    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       |
    121  |       |          |  |  |  |    |            |             |
    122  |       |          |  |  |  |    |            |             |
    123  |       |          |  |  |  |    |            |             |
    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    |             |
    129  |           |      |  |  |  |    |            |             |
    130  |           |      |  |  |  |    |            |             |
    131  |   FreeBSD 3.5    |  |  |  |    |        OpenBSD 2.7       |
    132  |           |      |  |  |  |    |            |             |
    133  |   FreeBSD 3.5.1  |  |  |  |    |            |             |
    134  |                  |  |  |  |    |            |             |
    135  *---FreeBSD 4.1    |  |  |  |    |            |             |
    136  |      |           |  | (?) |    |            |             |
    137  |   FreeBSD 4.1.1  |  |  /  |    |            |             |
    138  |      |           |  | /   |    |            |             |
    139  |   FreeBSD 4.2   Darwin/   | NetBSD 1.4.3    |             |
    140  |      |         Mac OS X   |             OpenBSD 2.8     BSD/OS 4.2
    141  |      |             |      |                 |             |
    142  |      |             |      |                 |             |
    143  |      |           10.0  NetBSD 1.5           |             |
    144  |   FreeBSD 4.3      |      |    |            |             |
    145  |      |             |      |    |        OpenBSD 2.9       |
    146  |      |             |      | NetBSD 1.5.1    |             |
    147  |      |             |      |    |            |             |
    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  |                 |             |
    156  |      |            10.2    |                 |             |
    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
    162  |      |         \   |      |    |            |             |
    163  |   FreeBSD 4.9   |  |      |    |        OpenBSD 3.4     BSD/OS 5.1 ISE
    164  |      |          |  |      |    |            |
    165  |      |          |  |      | NetBSD 1.6.2    |
    166  |      |          |  |      |    |            |
    167  |      |          |  |      |    |        OpenBSD 3.5
    168  |      |          |  |      |    v            |
    169  |   FreeBSD 4.10  |  |      |                 |
    170  |      |          |  |      |                 |
    171  |   FreeBSD 4.11  |  |      |                 |
    172  |      |          |  |      |                 |
    173  |      v           `-|------|-----------------|---------------------.
    174  |                    |      |                 |                      \
    175 FreeBSD 5.0           |      |                 |                       |
    176  |                    |      |                 |                       |
    177 FreeBSD 5.1           |      |                 |                  DragonFly 1.0
    178  |          \         |      |                 |                       |
    179  |           ----- Mac OS X  |                 |                       |
    180  |                   10.3    |                 |                       |
    181 FreeBSD 5.2           |      |                 |                       |
    182  |      |             |      |                 |                       |
    183  |   FreeBSD 5.2.1    |      |                 |                       |
    184  |                    |      |                 |                       |
    185  *-------FreeBSD 5.3  |      |                 |                       |
    186  |           |        |      |             OpenBSD 3.6                 |
    187  |           |        |   NetBSD 2.0           |                       |
    188  |           |        |      | |  |            |                 DragonFly 1.2.0
    189  |           |     Mac OS X  | | NetBSD 2.0.2  |                       |
    190  |           |       10.4    | |  |            |                       |
    191  |       FreeBSD 5.4  |      | |  |            |                       |
    192  |           |        |      | |  |        OpenBSD 3.7                 |
    193  |           |        |      | | NetBSD 2.0.3  |                       |
    194  |           |        |      | |  |            |                       |
    195  *--FreeBSD  |        |      | |  v        OpenBSD 3.8                 |
    196  |    6.0    |        |      | |               |                       |
    197  |     |     |        |      |  \              |                       |
    198  |     |     |        |      | NetBSD 2.1      |                       |
    199  |     |     |        |      |                 |                       |
    200  |     |     |        |   NetBSD 3.0           |                       |
    201  |     |     |        |      |    |            |                 DragonFly 1.4.0
    202  |     |     |        |      |    |        OpenBSD 3.9                 |
    203  |  FreeBSD  |        |      |    |            |                       |
    204  |    6.1    |        |      |    |            |                       |
    205  |     |  FreeBSD 5.5 |      |    |            |                       |
    206  |     V              |      |   NetBSD 3.0.1  |                 DragonFly 1.6.0
    207  |                    |      |                 |                       |
    208 FreeBSD 7 -current    |  NetBSD -current  OpenBSD -current             |
    209  |                    |      |                 |                       |
    210  v                    v      v                 v                       v
    211 
    212 Time
    213 ----------------
    214 
    215 Time tolerance +/- 6 months, depending on which book/article you read; if it
    216 was the announcement in Usenet or if it was available as tape.
    217 
    218 [44B] McKusick, Marshall Kirk, Keith Bostic, Michael J Karels,
    219 	and John Quarterman. The Design and Implementation of
    220 	the 4.4BSD Operating System.
    221 [APL] Apple website [http://www.apple.com/macosx/]
    222 [BSDI] Berkeley Software Design, Inc.
    223 [DFB] DragonFlyBSD Project, The.
    224 [DOC] README, COPYRIGHT on tape.
    225 [FBD] FreeBSD Project, The.
    226 [KB]  Keith Bostic. BSD2.10 available from Usenix. comp.unix.sources,
    227 	Volume 11, Info 4, April, 1987.
    228 [KKK] Mike Karels, Kirk McKusick, and Keith Bostic. tahoe announcement.
    229 	comp.bugs.4bsd.ucb-fixes, June 15, 1988.
    230 [KSJ] Michael J. Karels, Carl F. Smith, and William F. Jolitz.
    231 	Changes in the Kernel in 2.9BSD. Second Berkeley Software
    232 	Distribution UNIX Version 2.9, July, 1983.
    233 [NBD] NetBSD Project, The.
    234 [OBD] OpenBSD Project, The.
    235 [QCU] Salus, Peter H. A quarter century of UNIX.
    236 [SMS] Steven M. Schultz. 2.11BSD, UNIX for the PDP-11.
    237 [USE] Usenet announcement.
    238 [WRS] Wind River Systems, Inc.
    239 [dmr] Dennis Ritchie, via E-Mail
    240 
    241 Multics                 1965
    242 UNIX                    Summer 1969
    243 				DEC PDP-7
    244 First   Edition         1971-11-03 [QCU]
    245 				DEC PDP-11/20, Assembler
    246 Second  Edition         1972-06-12 [QCU]
    247 				10 UNIX installations
    248 Third   Edition         1973-02-xx [QCU]
    249 				Pipes, 16 installations
    250 Fourth  Edition         1973-11-xx [QCU]
    251 				rewriting in C effected,
    252                                 above 30 installations
    253 Fifth   Edition         1974-06-xx [QCU]
    254 				above 50 installations
    255 Sixth   Edition         1975-05-xx [QCU]
    256 				port to DEC Vax
    257 Seventh Edition         1979-01-xx [QCU]
    258 				first portable UNIX
    259 Eighth  Edition         1985-02-xx [QCU]
    260 				VAX 11/750, VAX 11/780 [dmr]
    261 				descended from 4.1c BSD [dmr]
    262 				descended from 4.1 BSD [44B]
    263 			scooping-out and replacement of the character-device
    264 			and networking part by the streams mechanism
    265 
    266 Ninth   Edition         1986-09-xx [QCU]
    267 Tenth   Edition         1989-10-xx [QCU]
    268 
    269 1BSD                    late 1977
    270 			1978-03-09 [QCU]
    271 				PDP-11, Pascal, ex(1)
    272 				30 free copies of 1BSD sent out
    273 				35 tapes sold for 50 USD [QCU]
    274 2BSD                    mid 1978 [QCU]
    275 				75 2BSD tapes shipped
    276 2.7.9BSD		?? [SMS]
    277 2.8BSD			1981-07-xx [KSJ]
    278 
    279 2.8.1BSD		1982-01-xx [QCU]
    280 				set of performance improvements
    281 2.9BSD			1983-07-xx [KSJ]
    282 2.9.1BSD                1983-11-xx
    283 2.9BSD-Seismo		1985-08-xx [SMS]
    284 2.10BSD			1987-04-xx [KKK]
    285 2.10.1BSD		1989-01-xx [SMS]
    286 2.11BSD			1992-02-xx [SMS]
    287 2.11BSD rev #430	1999-12-13 [SMS]
    288 
    289 32V			1978-1[01]-xx [QCU]
    290 3BSD                    late 1979 [QCU]
    291 				virtual memory, page replacement,
    292                         	demand paging
    293 4.0BSD                  1980-10-xx
    294 4.1BSD                  1981-07-08 [DOC]
    295 4.1aBSD                 1982-04-xx
    296 				alpha release, 100 sites, networking [44B]
    297 4.1bBSD				internal release, fast filesystem [44B]
    298 4.1cBSD                 late 1982
    299 				beta release, IPC [44B]
    300 4.2BSD                  1983-09-xx [QCU]
    301                         1983-08-03 [DOC]
    302 4.3BSD                  1986-06-xx [QCU]
    303 			1986-04-05 [KB], [DOC]
    304 4.3BSD Tahoe            1988-06-15 [QCU], [DOC]
    305 4.3BSD NET/1            1988-11-xx [QCU]
    306                         1989-01-01 [DOC]
    307 4.3BSD Reno             1990-06-29 [QCU], [DOC]
    308 4.3BSD NET/2            1991-06-28 [QCU], [DOC]
    309 
    310 BSD/386 ALPHA		1991-12-xx [BSDI]
    311 				first code released to people outside BSDI
    312 386BSD 0.0              1992-02-xx [DOC]
    313 BSD/386 0.3.1	        1992-04-xx [BSDI] first ext. beta; B customers
    314 BSD/386 0.3.3		1992-06-xx [BSDI] first CDROM version
    315 386BSD 0.1              1992-07-28 [DOC]
    316 4.4BSD Alpha            1992-07-07
    317 BSD/386 0.9.3		1992-10-xx [BSDI]
    318 				first external gamma; G customers
    319 BSD/386 0.9.4		1992-12-xx [BSDI]
    320 				would have been 1.0 except for request
    321 				for preliminary injunction
    322 BSD/386 1.0 		1993-03-xx [BSDI]
    323 				injunction denied; first official release
    324 NetBSD 0.8              1993-04-20 [NBD]
    325 4.4BSD                  1993-06-01 [USE]
    326 NetBSD 0.9              1993-08-23 [NBD]
    327 FreeBSD 1.0		1993-11-01 [FBD]
    328 BSD/386 1.1		1994-02-xx [BSDI]
    329 4.4BSD Lite             1994-03-01 [USE]
    330 FreeBSD 1.1		1994-05-07 [FBD]
    331 FreeBSD 1.1.5		1994-06-30 [FBD]
    332 FreeBSD 1.1.5.1		1994-07-05 [FBD]
    333 				supersedes 1.1.5 5 days after release.
    334 NetBSD 1.0              1994-10-26 [NBD]
    335 386BSD 1.0              1994-11-12 [USE]
    336 FreeBSD 2.0		1994-11-23 [FBD]
    337 BSD/OS 2.0		1995-01-xx [BSDI] 4.4 lite based
    338 FreeBSD 2.0.5		1995-06-10 [FBD]
    339 BSD/OS 2.0.1		1995-06-xx [BSDI]
    340 4.4BSD Lite Release 2	1995-06-xx [44B]
    341 				the true final distribution from the CSRG
    342 FreeBSD 2.1.0		1995-11-19 [FBD]
    343 NetBSD 1.1              1995-11-26 [NBD]
    344 BSD/OS 2.1		1996-01-xx [BSDI]
    345 FreeBSD 2.1.5		1996-07-14 [FBD]
    346 NetBSD 1.2              1996-10-04 [NBD]
    347 OpenBSD 2.0             1996-10-18 [OBD]
    348 FreeBSD 2.1.6		1996-11-16 [FBD]
    349 FreeBSD 2.1.6.1		1996-11-25 [FBD] (sendmail security release)
    350 Rhapsody		1997-xx-xx
    351 FreeBSD 2.1.7		1997-02-20 [FBD]
    352 BSD/OS 3.0		1997-02-xx [BSDI] 4.4 lite2 based
    353 FreeBSD 2.2.0		1997-03-16 [FBD]
    354 FreeBSD 2.2.1		1997-03-25 [FBD]
    355 FreeBSD 2.2.2		1997-05-16 [FBD]
    356 NetBSD 1.2.1            1997-05-20 [NBD] (patch release)
    357 OpenBSD 2.1             1997-06-01 [OBD]
    358 FreeBSD 2.2.5		1997-10-22 [FBD]
    359 OpenBSD 2.2             1997-12-01 [OBD]
    360 NetBSD 1.3              1998-01-04 [NBD]
    361 FreeBSD 2.2.6		1998-03-25 [FBD]
    362 NetBSD 1.3.1            1998-03-09 [NBD] (patch release)
    363 BSD/OS 3.1		1998-03-xx [BSDI]
    364 OpenBSD 2.3             1998-05-19 [OBD]
    365 NetBSD 1.3.2            1998-05-29 [NBD] (patch release)
    366 FreeBSD 2.2.7		1998-07-22 [FBD]
    367 BSD/OS 4.0		1998-08-xx [BSDI]
    368 				2-lock MP support, ELF executables
    369 FreeBSD 3.0		1998-10-16 [FBD]
    370 				FreeBSD-3.0 is a snapshot from -current,
    371 				while 3.1 and 3.2 are from 3.x-stable which
    372 				was branched quite some time after 3.0-release
    373 FreeBSD 2.2.8           1998-11-29 [FBD]
    374 OpenBSD 2.4             1998-12-01 [OBD]
    375 NetBSD 1.3.3            1998-12-23 [NBD] (patch release)
    376 FreeBSD 3.1		1999-02-15 [FBD]
    377 BSD/OS 4.0.1		1999-03-xx [BSDI]
    378 NetBSD 1.4              1999-05-12 [NBD]
    379 FreeBSD 3.2             1999-05-17 [FBD]
    380 OpenBSD 2.5             1999-05-19 [OBD]
    381 NetBSD 1.4.1            1999-08-26 [NBD] (patch release)
    382 FreeBSD 3.3             1999-09-17 [FBD]
    383 OpenBSD 2.6             1999-12-01 [OBD]
    384 FreeBSD 3.4             1999-12-20 [FBD]
    385 BSD/OS 4.1		1999-12-xx [BSDI]
    386 FreeBSD 4.0             2000-03-13 [FBD]
    387 NetBSD 1.4.2            2000-03-19 [NBD] (patch release)
    388 OpenBSD 2.7             2000-06-15 [OBD]
    389 FreeBSD 3.5		2000-06-24 [FBD]
    390 FreeBSD 4.1		2000-07-27 [FBD]
    391 FreeBSD 3.5.1		2000-07-28 [FBD]
    392 FreeBSD 4.1.1		2000-09-25 [FBD] (a network-only patch release)
    393 FreeBSD 4.2  		2000-11-21 [FBD]
    394 NetBSD 1.4.3		2000-11-25 [NBD] (patch release)
    395 BSD/OS 4.2		2000-11-29 [BSDI]
    396 OpenBSD 2.8		2000-12-01 [OBD]
    397 NetBSD 1.5              2000-12-06 [NBD]
    398 Mac OS X 10.0           2001-03-24 [APL]
    399 FreeBSD 4.3  		2001-04-20 [FBD]
    400 OpenBSD 2.9  		2001-06-01 [OBD]
    401 NetBSD 1.5.1		2001-07-11 [NBD] (patch release)
    402 NetBSD 1.5.2		2001-09-13 [NBD] (patch release)
    403 FreeBSD 4.4  		2001-09-18 [FBD]
    404 Mac OS X 10.1		2001-09-29 [APL]
    405 OpenBSD 3.0		2001-12-01 [OBD]
    406 FreeBSD 4.5  		2002-01-29 [FBD]
    407 BSD/OS 4.3		2002-03-14 [WRS]
    408 OpenBSD 3.1		2002-05-19 [OBD]
    409 FreeBSD 4.6  		2002-06-15 [FBD]
    410 NetBSD 1.5.3		2002-07-22 [NBD] (patch release)
    411 FreeBSD 4.6.2		2002-08-15 [FBD] (patch release)
    412 Mac OS X 10.2		2002-08-23 [APL]
    413 NetBSD 1.6		2002-09-14 [NBD]
    414 FreeBSD 4.7		2002-10-08 [FBD]
    415 OpenBSD 3.2		2002-11-01 [OBD]
    416 FreeBSD 5.0		2003-01-17 [FBD]
    417 				FreeBSD 5.0 is a separate branch off of
    418 				-current, similar to 3.0.
    419 FreeBSD 4.8		2003-04-03 [FBD]
    420 NetBSD 1.6.1		2003-04-21 [NBD] (patch release)
    421 OpenBSD 3.3		2003-05-01 [OBD]
    422 BSD/OS 5.0		2003-05-?? [WRS]
    423 FreeBSD 5.1		2003-06-09 [FBD]
    424 Mac OS X 10.3		2003-10-24 [APL]
    425 FreeBSD 4.9		2003-10-28 [FBD]
    426 BSD/OS 5.1 ISE		2003-10-?? [WRS] (final version)
    427 OpenBSD 3.4		2003-11-01 [OBD]
    428 FreeBSD 5.2		2004-01-12 [FBD]
    429 FreeBSD 5.2.1		2004-02-22 [FBD] (patch release)
    430 NetBSD 1.6.2		2004-03-01 [NBD] (patch release)
    431 OpenBSD 3.5		2004-04-01 [OBD]
    432 FreeBSD 4.10		2004-05-27 [FBD]
    433 DragonFly 1.0		2004-07-12 [DFB]
    434 OpenBSD 3.6		2004-10-29 [OBD]
    435 FreeBSD 5.3		2004-11-06 [FBD]
    436 NetBSD 2.0		2004-12-09 [NBD]
    437 FreeBSD 4.11		2005-01-25 [FBD]
    438 DragonFly 1.2.0		2005-04-08 [DFB]
    439 NetBSD 2.0.2		2005-04-14 [NBD] (security/critical release)
    440 Mac OS X 10.4		2005-04-29 [APL]
    441 FreeBSD 5.4		2005-05-09 [FBD]
    442 OpenBSD 3.7		2005-05-19 [OBD]
    443 NetBSD 2.0.3		2005-10-31 [NBD] (security/critical release)
    444 OpenBSD 3.8		2005-11-01 [OBD]
    445 FreeBSD 6.0		2005-11-01 [FBD]
    446 NetBSD 2.1		2005-11-02 [NBD]
    447 NetBSD 3.0		2005-12-23 [NBD]
    448 DragonFly 1.4.0		2006-01-08 [DFB]
    449 OpenBSD 3.9		2006-05-01 [OBD]
    450 FreeBSD 6.1		2006-05-08 [FBD]
    451 FreeBSD 5.5		2006-05-25 [FBD]
    452 NetBSD 3.0.1		2006-07-24 [NBD] (security/critical release)
    453 DragonFly 1.6.0		2006-07-24 [DFB]
    454 
    455 Bibliography
    456 ------------------------
    457 
    458 Leffler, Samuel J., Marshall Kirk McKusick, Michael J Karels and John
    459 Quarterman. The Design and Implementation of the 4.3BSD UNIX Operating
    460 System. Reading, Mass. Addison-Wesley, 1989. ISBN 0-201-06196-1
    461 
    462 Salus, Peter H. A quarter century of UNIX. Addison-Wesley Publishing
    463 Company, Inc., 1994. ISBN 0-201-54777-5
    464 
    465 McKusick, Marshall Kirk, Keith Bostic, Michael J Karels, and John
    466 Quarterman. The Design and Implementation of the 4.4BSD Operating
    467 System. Reading, Mass. Addison-Wesley, 1996. ISBN 0-201-54979-4
    468 
    469 McKusick, Marshall Kirk, George Neville-Neil. The Design and
    470 Implementation of the FreeBSD Operating System.
    471 Addison-Wesley Professional, Published: Aug 2, 2004. ISBN 0-201-70245-2
    472 
    473 Doug McIlroy. Research Unix Reader.
    474 
    475 Michael G. Brown. The Role of BSD in the Development of Unix.
    476 Presented to the Tasmanian Unix Special Interest Group of the
    477 Australian Computer Society, Hobart, August 1993.
    478 
    479 Peter H. Salus. Unix at 25. Byte Magazine, October 1994.
    480 URL: http://www.byte.com/art/9410/sec8/art3.htm
    481 
    482 Andreas Klemm, Lars Kller. If you're going to San Francisco ...
    483 Die freien BSD-Varianten von Unix. c't April 1997, page 368ff.
    484 
    485 BSD Release Announcements collection.
    486 URL: http://www.de.FreeBSD.org/de/ftp/releases/
    487 
    488 BSD Hypertext Man Pages
    489 URL: http://www.FreeBSD.org/cgi/man.cgi
    490 
    491 UNIX history graphing project
    492 URL: http://minnie.tuhs.org/Unix_History/index.html
    493 
    494 UNIX history
    495 URL: http://www.levenez.com/unix/
    496 
    497 James Howard: The BSD Family Tree
    498 URL: http://ezine.daemonnews.org/200104/bsd_family.html
    499 ("what are the differences between FreeBSD, NetBSD, and OpenBSD?")
    500 
    501 
    502 Acknowledgments
    503 ---------------
    504 
    505 Josh Gilliam for suggestions, bug fixes, and finding very old
    506 original BSD announcements from Usenet or tapes.
    507 
    508 Steven M. Schultz for providing 2.8BSD, 2.10BSD, 2.11BSD manual pages.
    509 
    510 --
    511 Copyright (c) 1997-2004 Wolfram Schneider <wosch (a] FreeBSD.ORG>
    512 URL: http://cvsweb.freebsd.org/src/share/misc/bsd-family-tree
    513 
    514 $FreeBSD: src/share/misc/bsd-family-tree,v 1.107 2006/08/01 15:26:09 maxim Exp $
    515