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bsd-family-tree revision 1.38
      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  |     |              |      | | NetBSD 3.0.1  |                 DragonFly 1.6.0
    207  |     |              |      | |  |            |                       |
    208  |     V              |      | |  |        OpenBSD 4.0                 |
    209  |                    |      | | NetBSD 3.0.2  |                       |
    210  |                    |      | NetBSD 3.1      |                       |
    211  |                    |      |                 |                       |
    212 FreeBSD 7 -current    |  NetBSD -current  OpenBSD -current             |
    213  |                    |      |                 |                       |
    214  v                    v      v                 v                       v
    215 
    216 Time
    217 ----------------
    218 
    219 Time tolerance +/- 6 months, depending on which book/article you read; if it
    220 was the announcement in Usenet or if it was available as tape.
    221 
    222 [44B] McKusick, Marshall Kirk, Keith Bostic, Michael J Karels,
    223 	and John Quarterman. The Design and Implementation of
    224 	the 4.4BSD Operating System.
    225 [APL] Apple website [http://www.apple.com/macosx/]
    226 [BSDI] Berkeley Software Design, Inc.
    227 [DFB] DragonFlyBSD Project, The.
    228 [DOC] README, COPYRIGHT on tape.
    229 [FBD] FreeBSD Project, The.
    230 [KB]  Keith Bostic. BSD2.10 available from Usenix. comp.unix.sources,
    231 	Volume 11, Info 4, April, 1987.
    232 [KKK] Mike Karels, Kirk McKusick, and Keith Bostic. tahoe announcement.
    233 	comp.bugs.4bsd.ucb-fixes, June 15, 1988.
    234 [KSJ] Michael J. Karels, Carl F. Smith, and William F. Jolitz.
    235 	Changes in the Kernel in 2.9BSD. Second Berkeley Software
    236 	Distribution UNIX Version 2.9, July, 1983.
    237 [NBD] NetBSD Project, The.
    238 [OBD] OpenBSD Project, The.
    239 [QCU] Salus, Peter H. A quarter century of UNIX.
    240 [SMS] Steven M. Schultz. 2.11BSD, UNIX for the PDP-11.
    241 [USE] Usenet announcement.
    242 [WRS] Wind River Systems, Inc.
    243 [dmr] Dennis Ritchie, via E-Mail
    244 
    245 Multics                 1965
    246 UNIX                    Summer 1969
    247 				DEC PDP-7
    248 First   Edition         1971-11-03 [QCU]
    249 				DEC PDP-11/20, Assembler
    250 Second  Edition         1972-06-12 [QCU]
    251 				10 UNIX installations
    252 Third   Edition         1973-02-xx [QCU]
    253 				Pipes, 16 installations
    254 Fourth  Edition         1973-11-xx [QCU]
    255 				rewriting in C effected,
    256                                 above 30 installations
    257 Fifth   Edition         1974-06-xx [QCU]
    258 				above 50 installations
    259 Sixth   Edition         1975-05-xx [QCU]
    260 				port to DEC Vax
    261 Seventh Edition         1979-01-xx [QCU]
    262 				first portable UNIX
    263 Eighth  Edition         1985-02-xx [QCU]
    264 				VAX 11/750, VAX 11/780 [dmr]
    265 				descended from 4.1c BSD [dmr]
    266 				descended from 4.1 BSD [44B]
    267 			scooping-out and replacement of the character-device
    268 			and networking part by the streams mechanism
    269 
    270 Ninth   Edition         1986-09-xx [QCU]
    271 Tenth   Edition         1989-10-xx [QCU]
    272 
    273 1BSD                    late 1977
    274 			1978-03-09 [QCU]
    275 				PDP-11, Pascal, ex(1)
    276 				30 free copies of 1BSD sent out
    277 				35 tapes sold for 50 USD [QCU]
    278 2BSD                    mid 1978 [QCU]
    279 				75 2BSD tapes shipped
    280 2.7.9BSD		?? [SMS]
    281 2.8BSD			1981-07-xx [KSJ]
    282 
    283 2.8.1BSD		1982-01-xx [QCU]
    284 				set of performance improvements
    285 2.9BSD			1983-07-xx [KSJ]
    286 2.9.1BSD                1983-11-xx
    287 2.9BSD-Seismo		1985-08-xx [SMS]
    288 2.10BSD			1987-04-xx [KKK]
    289 2.10.1BSD		1989-01-xx [SMS]
    290 2.11BSD			1992-02-xx [SMS]
    291 2.11BSD rev #430	1999-12-13 [SMS]
    292 
    293 32V			1978-1[01]-xx [QCU]
    294 3BSD                    late 1979 [QCU]
    295 				virtual memory, page replacement,
    296                         	demand paging
    297 4.0BSD                  1980-10-xx
    298 4.1BSD                  1981-07-08 [DOC]
    299 4.1aBSD                 1982-04-xx
    300 				alpha release, 100 sites, networking [44B]
    301 4.1bBSD				internal release, fast filesystem [44B]
    302 4.1cBSD                 late 1982
    303 				beta release, IPC [44B]
    304 4.2BSD                  1983-09-xx [QCU]
    305                         1983-08-03 [DOC]
    306 4.3BSD                  1986-06-xx [QCU]
    307 			1986-04-05 [KB], [DOC]
    308 4.3BSD Tahoe            1988-06-15 [QCU], [DOC]
    309 4.3BSD NET/1            1988-11-xx [QCU]
    310                         1989-01-01 [DOC]
    311 4.3BSD Reno             1990-06-29 [QCU], [DOC]
    312 4.3BSD NET/2            1991-06-28 [QCU], [DOC]
    313 
    314 BSD/386 ALPHA		1991-12-xx [BSDI]
    315 				first code released to people outside BSDI
    316 386BSD 0.0              1992-02-xx [DOC]
    317 BSD/386 0.3.1	        1992-04-xx [BSDI] first ext. beta; B customers
    318 BSD/386 0.3.3		1992-06-xx [BSDI] first CDROM version
    319 386BSD 0.1              1992-07-28 [DOC]
    320 4.4BSD Alpha            1992-07-07
    321 BSD/386 0.9.3		1992-10-xx [BSDI]
    322 				first external gamma; G customers
    323 BSD/386 0.9.4		1992-12-xx [BSDI]
    324 				would have been 1.0 except for request
    325 				for preliminary injunction
    326 BSD/386 1.0 		1993-03-xx [BSDI]
    327 				injunction denied; first official release
    328 NetBSD 0.8              1993-04-20 [NBD]
    329 4.4BSD                  1993-06-01 [USE]
    330 NetBSD 0.9              1993-08-23 [NBD]
    331 FreeBSD 1.0		1993-11-01 [FBD]
    332 BSD/386 1.1		1994-02-xx [BSDI]
    333 4.4BSD Lite             1994-03-01 [USE]
    334 FreeBSD 1.1		1994-05-07 [FBD]
    335 FreeBSD 1.1.5		1994-06-30 [FBD]
    336 FreeBSD 1.1.5.1		1994-07-05 [FBD]
    337 				supersedes 1.1.5 5 days after release.
    338 NetBSD 1.0              1994-10-26 [NBD]
    339 386BSD 1.0              1994-11-12 [USE]
    340 FreeBSD 2.0		1994-11-23 [FBD]
    341 BSD/OS 2.0		1995-01-xx [BSDI] 4.4 lite based
    342 FreeBSD 2.0.5		1995-06-10 [FBD]
    343 BSD/OS 2.0.1		1995-06-xx [BSDI]
    344 4.4BSD Lite Release 2	1995-06-xx [44B]
    345 				the true final distribution from the CSRG
    346 FreeBSD 2.1.0		1995-11-19 [FBD]
    347 NetBSD 1.1              1995-11-26 [NBD]
    348 BSD/OS 2.1		1996-01-xx [BSDI]
    349 FreeBSD 2.1.5		1996-07-14 [FBD]
    350 NetBSD 1.2              1996-10-04 [NBD]
    351 OpenBSD 2.0             1996-10-18 [OBD]
    352 FreeBSD 2.1.6		1996-11-16 [FBD]
    353 FreeBSD 2.1.6.1		1996-11-25 [FBD] (sendmail security release)
    354 Rhapsody		1997-xx-xx
    355 FreeBSD 2.1.7		1997-02-20 [FBD]
    356 BSD/OS 3.0		1997-02-xx [BSDI] 4.4 lite2 based
    357 FreeBSD 2.2.0		1997-03-16 [FBD]
    358 FreeBSD 2.2.1		1997-03-25 [FBD]
    359 FreeBSD 2.2.2		1997-05-16 [FBD]
    360 NetBSD 1.2.1            1997-05-20 [NBD] (patch release)
    361 OpenBSD 2.1             1997-06-01 [OBD]
    362 FreeBSD 2.2.5		1997-10-22 [FBD]
    363 OpenBSD 2.2             1997-12-01 [OBD]
    364 NetBSD 1.3              1998-01-04 [NBD]
    365 FreeBSD 2.2.6		1998-03-25 [FBD]
    366 NetBSD 1.3.1            1998-03-09 [NBD] (patch release)
    367 BSD/OS 3.1		1998-03-xx [BSDI]
    368 OpenBSD 2.3             1998-05-19 [OBD]
    369 NetBSD 1.3.2            1998-05-29 [NBD] (patch release)
    370 FreeBSD 2.2.7		1998-07-22 [FBD]
    371 BSD/OS 4.0		1998-08-xx [BSDI]
    372 				2-lock MP support, ELF executables
    373 FreeBSD 3.0		1998-10-16 [FBD]
    374 				FreeBSD-3.0 is a snapshot from -current,
    375 				while 3.1 and 3.2 are from 3.x-stable which
    376 				was branched quite some time after 3.0-release
    377 FreeBSD 2.2.8           1998-11-29 [FBD]
    378 OpenBSD 2.4             1998-12-01 [OBD]
    379 NetBSD 1.3.3            1998-12-23 [NBD] (patch release)
    380 FreeBSD 3.1		1999-02-15 [FBD]
    381 BSD/OS 4.0.1		1999-03-xx [BSDI]
    382 NetBSD 1.4              1999-05-12 [NBD]
    383 FreeBSD 3.2             1999-05-17 [FBD]
    384 OpenBSD 2.5             1999-05-19 [OBD]
    385 NetBSD 1.4.1            1999-08-26 [NBD] (patch release)
    386 FreeBSD 3.3             1999-09-17 [FBD]
    387 OpenBSD 2.6             1999-12-01 [OBD]
    388 FreeBSD 3.4             1999-12-20 [FBD]
    389 BSD/OS 4.1		1999-12-xx [BSDI]
    390 FreeBSD 4.0             2000-03-13 [FBD]
    391 NetBSD 1.4.2            2000-03-19 [NBD] (patch release)
    392 OpenBSD 2.7             2000-06-15 [OBD]
    393 FreeBSD 3.5		2000-06-24 [FBD]
    394 FreeBSD 4.1		2000-07-27 [FBD]
    395 FreeBSD 3.5.1		2000-07-28 [FBD]
    396 FreeBSD 4.1.1		2000-09-25 [FBD] (a network-only patch release)
    397 FreeBSD 4.2  		2000-11-21 [FBD]
    398 NetBSD 1.4.3		2000-11-25 [NBD] (patch release)
    399 BSD/OS 4.2		2000-11-29 [BSDI]
    400 OpenBSD 2.8		2000-12-01 [OBD]
    401 NetBSD 1.5              2000-12-06 [NBD]
    402 Mac OS X 10.0           2001-03-24 [APL]
    403 FreeBSD 4.3  		2001-04-20 [FBD]
    404 OpenBSD 2.9  		2001-06-01 [OBD]
    405 NetBSD 1.5.1		2001-07-11 [NBD] (patch release)
    406 NetBSD 1.5.2		2001-09-13 [NBD] (patch release)
    407 FreeBSD 4.4  		2001-09-18 [FBD]
    408 Mac OS X 10.1		2001-09-29 [APL]
    409 OpenBSD 3.0		2001-12-01 [OBD]
    410 FreeBSD 4.5  		2002-01-29 [FBD]
    411 BSD/OS 4.3		2002-03-14 [WRS]
    412 OpenBSD 3.1		2002-05-19 [OBD]
    413 FreeBSD 4.6  		2002-06-15 [FBD]
    414 NetBSD 1.5.3		2002-07-22 [NBD] (patch release)
    415 FreeBSD 4.6.2		2002-08-15 [FBD] (patch release)
    416 Mac OS X 10.2		2002-08-23 [APL]
    417 NetBSD 1.6		2002-09-14 [NBD]
    418 FreeBSD 4.7		2002-10-08 [FBD]
    419 OpenBSD 3.2		2002-11-01 [OBD]
    420 FreeBSD 5.0		2003-01-17 [FBD]
    421 				FreeBSD 5.0 is a separate branch off of
    422 				-current, similar to 3.0.
    423 FreeBSD 4.8		2003-04-03 [FBD]
    424 NetBSD 1.6.1		2003-04-21 [NBD] (patch release)
    425 OpenBSD 3.3		2003-05-01 [OBD]
    426 BSD/OS 5.0		2003-05-?? [WRS]
    427 FreeBSD 5.1		2003-06-09 [FBD]
    428 Mac OS X 10.3		2003-10-24 [APL]
    429 FreeBSD 4.9		2003-10-28 [FBD]
    430 BSD/OS 5.1 ISE		2003-10-?? [WRS] (final version)
    431 OpenBSD 3.4		2003-11-01 [OBD]
    432 FreeBSD 5.2		2004-01-12 [FBD]
    433 FreeBSD 5.2.1		2004-02-22 [FBD] (patch release)
    434 NetBSD 1.6.2		2004-03-01 [NBD] (patch release)
    435 OpenBSD 3.5		2004-04-01 [OBD]
    436 FreeBSD 4.10		2004-05-27 [FBD]
    437 DragonFly 1.0		2004-07-12 [DFB]
    438 OpenBSD 3.6		2004-10-29 [OBD]
    439 FreeBSD 5.3		2004-11-06 [FBD]
    440 NetBSD 2.0		2004-12-09 [NBD]
    441 FreeBSD 4.11		2005-01-25 [FBD]
    442 DragonFly 1.2.0		2005-04-08 [DFB]
    443 NetBSD 2.0.2		2005-04-14 [NBD] (security/critical release)
    444 Mac OS X 10.4		2005-04-29 [APL]
    445 FreeBSD 5.4		2005-05-09 [FBD]
    446 OpenBSD 3.7		2005-05-19 [OBD]
    447 NetBSD 2.0.3		2005-10-31 [NBD] (security/critical release)
    448 OpenBSD 3.8		2005-11-01 [OBD]
    449 FreeBSD 6.0		2005-11-01 [FBD]
    450 NetBSD 2.1		2005-11-02 [NBD]
    451 NetBSD 3.0		2005-12-23 [NBD]
    452 DragonFly 1.4.0		2006-01-08 [DFB]
    453 OpenBSD 3.9		2006-05-01 [OBD]
    454 FreeBSD 6.1		2006-05-08 [FBD]
    455 FreeBSD 5.5		2006-05-25 [FBD]
    456 NetBSD 3.0.1		2006-07-24 [NBD] (security/critical release)
    457 DragonFly 1.6.0		2006-07-24 [DFB]
    458 OpenBSD 4.0		2006-11-01 [OBD]
    459 NetBSD 3.0.2		2006-11-04 [NBD] (security/critical release)
    460 NetBSD 3.1		2006-11-04 [NBD]
    461 
    462 Bibliography
    463 ------------------------
    464 
    465 Leffler, Samuel J., Marshall Kirk McKusick, Michael J Karels and John
    466 Quarterman. The Design and Implementation of the 4.3BSD UNIX Operating
    467 System. Reading, Mass. Addison-Wesley, 1989. ISBN 0-201-06196-1
    468 
    469 Salus, Peter H. A quarter century of UNIX. Addison-Wesley Publishing
    470 Company, Inc., 1994. ISBN 0-201-54777-5
    471 
    472 McKusick, Marshall Kirk, Keith Bostic, Michael J Karels, and John
    473 Quarterman. The Design and Implementation of the 4.4BSD Operating
    474 System. Reading, Mass. Addison-Wesley, 1996. ISBN 0-201-54979-4
    475 
    476 McKusick, Marshall Kirk, George Neville-Neil. The Design and
    477 Implementation of the FreeBSD Operating System.
    478 Addison-Wesley Professional, Published: Aug 2, 2004. ISBN 0-201-70245-2
    479 
    480 Doug McIlroy. Research Unix Reader.
    481 
    482 Michael G. Brown. The Role of BSD in the Development of Unix.
    483 Presented to the Tasmanian Unix Special Interest Group of the
    484 Australian Computer Society, Hobart, August 1993.
    485 
    486 Peter H. Salus. Unix at 25. Byte Magazine, October 1994.
    487 URL: http://www.byte.com/art/9410/sec8/art3.htm
    488 
    489 Andreas Klemm, Lars Kller. If you're going to San Francisco ...
    490 Die freien BSD-Varianten von Unix. c't April 1997, page 368ff.
    491 
    492 BSD Release Announcements collection.
    493 URL: http://www.de.FreeBSD.org/de/ftp/releases/
    494 
    495 BSD Hypertext Man Pages
    496 URL: http://www.FreeBSD.org/cgi/man.cgi
    497 
    498 UNIX history graphing project
    499 URL: http://minnie.tuhs.org/Unix_History/index.html
    500 
    501 UNIX history
    502 URL: http://www.levenez.com/unix/
    503 
    504 James Howard: The BSD Family Tree
    505 URL: http://ezine.daemonnews.org/200104/bsd_family.html
    506 ("what are the differences between FreeBSD, NetBSD, and OpenBSD?")
    507 
    508 
    509 Acknowledgments
    510 ---------------
    511 
    512 Josh Gilliam for suggestions, bug fixes, and finding very old
    513 original BSD announcements from Usenet or tapes.
    514 
    515 Steven M. Schultz for providing 2.8BSD, 2.10BSD, 2.11BSD manual pages.
    516 
    517 --
    518 Copyright (c) 1997-2004 Wolfram Schneider <wosch (a] FreeBSD.ORG>
    519 URL: http://cvsweb.freebsd.org/src/share/misc/bsd-family-tree
    520 
    521 $FreeBSD: src/share/misc/bsd-family-tree,v 1.109 2006/11/05 15:56:45 maxim Exp $
    522