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bsd-family-tree revision 1.35
      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              |      |                 |                       |
    207 FreeBSD 7 -current    |  NetBSD -current  OpenBSD -current             |
    208  |                    |      |                 |                       |
    209  v                    v      v                 v                       v
    210 
    211 Time
    212 ----------------
    213 
    214 Time tolerance +/- 6 months, depending on which book/article you read; if it
    215 was the announcement in Usenet or if it was available as tape.
    216 
    217 [44B] McKusick, Marshall Kirk, Keith Bostic, Michael J Karels,
    218 	and John Quarterman. The Design and Implementation of
    219 	the 4.4BSD Operating System.
    220 [APL] Apple website [http://www.apple.com/macosx/]
    221 [BSDI] Berkeley Software Design, Inc.
    222 [DFB] DragonFlyBSD Project, The.
    223 [DOC] README, COPYRIGHT on tape.
    224 [FBD] FreeBSD Project, The.
    225 [KB]  Keith Bostic. BSD2.10 available from Usenix. comp.unix.sources,
    226 	Volume 11, Info 4, April, 1987.
    227 [KKK] Mike Karels, Kirk McKusick, and Keith Bostic. tahoe announcement.
    228 	comp.bugs.4bsd.ucb-fixes, June 15, 1988.
    229 [KSJ] Michael J. Karels, Carl F. Smith, and William F. Jolitz.
    230 	Changes in the Kernel in 2.9BSD. Second Berkeley Software
    231 	Distribution UNIX Version 2.9, July, 1983.
    232 [NBD] NetBSD Project, The.
    233 [OBD] OpenBSD Project, The.
    234 [QCU] Salus, Peter H. A quarter century of UNIX.
    235 [SMS] Steven M. Schultz. 2.11BSD, UNIX for the PDP-11.
    236 [USE] Usenet announcement.
    237 [WRS] Wind River Systems, Inc.
    238 [dmr] Dennis Ritchie, via E-Mail
    239 
    240 Multics                 1965
    241 UNIX                    Summer 1969
    242 				DEC PDP-7
    243 First   Edition         1971-11-03 [QCU]
    244 				DEC PDP-11/20, Assembler
    245 Second  Edition         1972-06-12 [QCU]
    246 				10 UNIX installations
    247 Third   Edition         1973-02-xx [QCU]
    248 				Pipes, 16 installations
    249 Fourth  Edition         1973-11-xx [QCU]
    250 				rewriting in C effected,
    251                                 above 30 installations
    252 Fifth   Edition         1974-06-xx [QCU]
    253 				above 50 installations
    254 Sixth   Edition         1975-05-xx [QCU]
    255 				port to DEC Vax
    256 Seventh Edition         1979-01-xx [QCU]
    257 				first portable UNIX
    258 Eighth  Edition         1985-02-xx [QCU]
    259 				VAX 11/750, VAX 11/780 [dmr]
    260 				descended from 4.1c BSD [dmr]
    261 				descended from 4.1 BSD [44B]
    262 			scooping-out and replacement of the character-device
    263 			and networking part by the streams mechanism
    264 
    265 Ninth   Edition         1986-09-xx [QCU]
    266 Tenth   Edition         1989-10-xx [QCU]
    267 
    268 1BSD                    late 1977
    269 			1978-03-09 [QCU]
    270 				PDP-11, Pascal, ex(1)
    271 				30 free copies of 1BSD sent out
    272 				35 tapes sold for 50 USD [QCU]
    273 2BSD                    mid 1978 [QCU]
    274 				75 2BSD tapes shipped
    275 2.7.9BSD		?? [SMS]
    276 2.8BSD			1981-07-xx [KSJ]
    277 
    278 2.8.1BSD		1982-01-xx [QCU]
    279 				set of performance improvements
    280 2.9BSD			1983-07-xx [KSJ]
    281 2.9.1BSD                1983-11-xx
    282 2.9BSD-Seismo		1985-08-xx [SMS]
    283 2.10BSD			1987-04-xx [KKK]
    284 2.10.1BSD		1989-01-xx [SMS]
    285 2.11BSD			1992-02-xx [SMS]
    286 2.11BSD rev #430	1999-12-13 [SMS]
    287 
    288 32V			1978-1[01]-xx [QCU]
    289 3BSD                    late 1979 [QCU]
    290 				virtual memory, page replacement,
    291                         	demand paging
    292 4.0BSD                  1980-10-xx
    293 4.1BSD                  1981-07-08 [DOC]
    294 4.1aBSD                 1982-04-xx
    295 				alpha release, 100 sites, networking [44B]
    296 4.1bBSD				internal release, fast filesystem [44B]
    297 4.1cBSD                 late 1982
    298 				beta release, IPC [44B]
    299 4.2BSD                  1983-09-xx [QCU]
    300                         1983-08-03 [DOC]
    301 4.3BSD                  1986-06-xx [QCU]
    302 			1986-04-05 [KB], [DOC]
    303 4.3BSD Tahoe            1988-06-15 [QCU], [DOC]
    304 4.3BSD NET/1            1988-11-xx [QCU]
    305                         1989-01-01 [DOC]
    306 4.3BSD Reno             1990-06-29 [QCU], [DOC]
    307 4.3BSD NET/2            1991-06-28 [QCU], [DOC]
    308 
    309 BSD/386 ALPHA		1991-12-xx [BSDI]
    310 				first code released to people outside BSDI
    311 386BSD 0.0              1992-02-xx [DOC]
    312 BSD/386 0.3.1	        1992-04-xx [BSDI] first ext. beta; B customers
    313 BSD/386 0.3.3		1992-06-xx [BSDI] first CDROM version
    314 386BSD 0.1              1992-07-28 [DOC]
    315 4.4BSD Alpha            1992-07-07
    316 BSD/386 0.9.3		1992-10-xx [BSDI]
    317 				first external gamma; G customers
    318 BSD/386 0.9.4		1992-12-xx [BSDI]
    319 				would have been 1.0 except for request
    320 				for preliminary injunction
    321 BSD/386 1.0 		1993-03-xx [BSDI]
    322 				injunction denied; first official release
    323 NetBSD 0.8              1993-04-20 [NBD]
    324 4.4BSD                  1993-06-01 [USE]
    325 NetBSD 0.9              1993-08-23 [NBD]
    326 FreeBSD 1.0		1993-11-01 [FBD]
    327 BSD/386 1.1		1994-02-xx [BSDI]
    328 4.4BSD Lite             1994-03-01 [USE]
    329 FreeBSD 1.1		1994-05-07 [FBD]
    330 FreeBSD 1.1.5		1994-06-30 [FBD]
    331 FreeBSD 1.1.5.1		1994-07-05 [FBD]
    332 				supersedes 1.1.5 5 days after release.
    333 NetBSD 1.0              1994-10-26 [NBD]
    334 386BSD 1.0              1994-11-12 [USE]
    335 FreeBSD 2.0		1994-11-23 [FBD]
    336 BSD/OS 2.0		1995-01-xx [BSDI] 4.4 lite based
    337 FreeBSD 2.0.5		1995-06-10 [FBD]
    338 BSD/OS 2.0.1		1995-06-xx [BSDI]
    339 4.4BSD Lite Release 2	1995-06-xx [44B]
    340 				the true final distribution from the CSRG
    341 FreeBSD 2.1.0		1995-11-19 [FBD]
    342 NetBSD 1.1              1995-11-26 [NBD]
    343 BSD/OS 2.1		1996-01-xx [BSDI]
    344 FreeBSD 2.1.5		1996-07-14 [FBD]
    345 NetBSD 1.2              1996-10-04 [NBD]
    346 OpenBSD 2.0             1996-10-18 [OBD]
    347 FreeBSD 2.1.6		1996-11-16 [FBD]
    348 FreeBSD 2.1.6.1		1996-11-25 [FBD] (sendmail security release)
    349 Rhapsody		1997-xx-xx
    350 FreeBSD 2.1.7		1997-02-20 [FBD]
    351 BSD/OS 3.0		1997-02-xx [BSDI] 4.4 lite2 based
    352 FreeBSD 2.2.0		1997-03-16 [FBD]
    353 FreeBSD 2.2.1		1997-03-25 [FBD]
    354 FreeBSD 2.2.2		1997-05-16 [FBD]
    355 NetBSD 1.2.1            1997-05-20 [NBD] (patch release)
    356 OpenBSD 2.1             1997-06-01 [OBD]
    357 FreeBSD 2.2.5		1997-10-22 [FBD]
    358 OpenBSD 2.2             1997-12-01 [OBD]
    359 NetBSD 1.3              1998-01-04 [NBD]
    360 FreeBSD 2.2.6		1998-03-25 [FBD]
    361 NetBSD 1.3.1            1998-03-09 [NBD] (patch release)
    362 BSD/OS 3.1		1998-03-xx [BSDI]
    363 OpenBSD 2.3             1998-05-19 [OBD]
    364 NetBSD 1.3.2            1998-05-29 [NBD] (patch release)
    365 FreeBSD 2.2.7		1998-07-22 [FBD]
    366 BSD/OS 4.0		1998-08-xx [BSDI]
    367 				2-lock MP support, ELF executables
    368 FreeBSD 3.0		1998-10-16 [FBD]
    369 				FreeBSD-3.0 is a snapshot from -current,
    370 				while 3.1 and 3.2 are from 3.x-stable which
    371 				was branched quite some time after 3.0-release
    372 FreeBSD 2.2.8           1998-11-29 [FBD]
    373 OpenBSD 2.4             1998-12-01 [OBD]
    374 NetBSD 1.3.3            1998-12-23 [NBD] (patch release)
    375 FreeBSD 3.1		1999-02-15 [FBD]
    376 BSD/OS 4.0.1		1999-03-xx [BSDI]
    377 NetBSD 1.4              1999-05-12 [NBD]
    378 FreeBSD 3.2             1999-05-17 [FBD]
    379 OpenBSD 2.5             1999-05-19 [OBD]
    380 NetBSD 1.4.1            1999-08-26 [NBD] (patch release)
    381 FreeBSD 3.3             1999-09-17 [FBD]
    382 OpenBSD 2.6             1999-12-01 [OBD]
    383 FreeBSD 3.4             1999-12-20 [FBD]
    384 BSD/OS 4.1		1999-12-xx [BSDI]
    385 FreeBSD 4.0             2000-03-13 [FBD]
    386 NetBSD 1.4.2            2000-03-19 [NBD] (patch release)
    387 OpenBSD 2.7             2000-06-15 [OBD]
    388 FreeBSD 3.5		2000-06-24 [FBD]
    389 FreeBSD 4.1		2000-07-27 [FBD]
    390 FreeBSD 3.5.1		2000-07-28 [FBD]
    391 FreeBSD 4.1.1		2000-09-25 [FBD] (a network-only patch release)
    392 FreeBSD 4.2  		2000-11-21 [FBD]
    393 NetBSD 1.4.3		2000-11-25 [NBD] (patch release)
    394 BSD/OS 4.2		2000-11-29 [BSDI]
    395 OpenBSD 2.8		2000-12-01 [OBD]
    396 NetBSD 1.5              2000-12-06 [NBD]
    397 Mac OS X 10.0           2001-03-24 [APL]
    398 FreeBSD 4.3  		2001-04-20 [FBD]
    399 OpenBSD 2.9  		2001-06-01 [OBD]
    400 NetBSD 1.5.1		2001-07-11 [NBD] (patch release)
    401 NetBSD 1.5.2		2001-09-13 [NBD] (patch release)
    402 FreeBSD 4.4  		2001-09-18 [FBD]
    403 Mac OS X 10.1		2001-09-29 [APL]
    404 OpenBSD 3.0		2001-12-01 [OBD]
    405 FreeBSD 4.5  		2002-01-29 [FBD]
    406 BSD/OS 4.3		2002-03-14 [WRS]
    407 OpenBSD 3.1		2002-05-19 [OBD]
    408 FreeBSD 4.6  		2002-06-15 [FBD]
    409 NetBSD 1.5.3		2002-07-22 [NBD] (patch release)
    410 FreeBSD 4.6.2		2002-08-15 [FBD] (patch release)
    411 Mac OS X 10.2		2002-08-23 [APL]
    412 NetBSD 1.6		2002-09-14 [NBD]
    413 FreeBSD 4.7		2002-10-08 [FBD]
    414 OpenBSD 3.2		2002-11-01 [OBD]
    415 FreeBSD 5.0		2003-01-17 [FBD]
    416 				FreeBSD 5.0 is a separate branch off of
    417 				-current, similar to 3.0.
    418 FreeBSD 4.8		2003-04-03 [FBD]
    419 NetBSD 1.6.1		2003-04-21 [NBD] (patch release)
    420 OpenBSD 3.3		2003-05-01 [OBD]
    421 BSD/OS 5.0		2003-05-?? [WRS]
    422 FreeBSD 5.1		2003-06-09 [FBD]
    423 Mac OS X 10.3		2003-10-24 [APL]
    424 FreeBSD 4.9		2003-10-28 [FBD]
    425 BSD/OS 5.1 ISE		2003-10-?? [WRS] (final version)
    426 OpenBSD 3.4		2003-11-01 [OBD]
    427 FreeBSD 5.2		2004-01-12 [FBD]
    428 FreeBSD 5.2.1		2004-02-22 [FBD] (patch release)
    429 NetBSD 1.6.2		2004-03-01 [NBD] (patch release)
    430 OpenBSD 3.5		2004-04-01 [OBD]
    431 FreeBSD 4.10		2004-05-27 [FBD]
    432 DragonFly 1.0		2004-07-12 [DFB]
    433 OpenBSD 3.6		2004-10-29 [OBD]
    434 FreeBSD 5.3		2004-11-06 [FBD]
    435 NetBSD 2.0		2004-12-09 [NBD]
    436 FreeBSD 4.11		2005-01-25 [FBD]
    437 DragonFly 1.2.0		2005-04-08 [DFB]
    438 NetBSD 2.0.2		2005-04-14 [NBD] (security/critical release)
    439 Mac OS X 10.4		2005-04-29 [APL]
    440 FreeBSD 5.4		2005-05-09 [FBD]
    441 OpenBSD 3.7		2005-05-19 [OBD]
    442 NetBSD 2.0.3		2005-10-31 [NBD] (security/critical release)
    443 OpenBSD 3.8		2005-11-01 [OBD]
    444 FreeBSD 6.0		2005-11-01 [FBD]
    445 NetBSD 2.1		2005-11-02 [NBD]
    446 NetBSD 3.0		2005-12-23 [NBD]
    447 DragonFly 1.4.0		2006-01-08 [DFB]
    448 OpenBSD 3.9		2006-05-01 [OBD]
    449 FreeBSD 6.1		2006-05-08 [FBD]
    450 FreeBSD 5.5		2006-05-25 [FBD]
    451 
    452 Bibliography
    453 ------------------------
    454 
    455 Leffler, Samuel J., Marshall Kirk McKusick, Michael J Karels and John
    456 Quarterman. The Design and Implementation of the 4.3BSD UNIX Operating
    457 System. Reading, Mass. Addison-Wesley, 1989. ISBN 0-201-06196-1
    458 
    459 Salus, Peter H. A quarter century of UNIX. Addison-Wesley Publishing
    460 Company, Inc., 1994. ISBN 0-201-54777-5
    461 
    462 McKusick, Marshall Kirk, Keith Bostic, Michael J Karels, and John
    463 Quarterman. The Design and Implementation of the 4.4BSD Operating
    464 System. Reading, Mass. Addison-Wesley, 1996. ISBN 0-201-54979-4
    465 
    466 McKusick, Marshall Kirk, George Neville-Neil. The Design and
    467 Implementation of the FreeBSD Operating System.
    468 Addison-Wesley Professional, Published: Aug 2, 2004. ISBN 0-201-70245-2
    469 
    470 Doug McIlroy. Research Unix Reader.
    471 
    472 Michael G. Brown. The Role of BSD in the Development of Unix.
    473 Presented to the Tasmanian Unix Special Interest Group of the
    474 Australian Computer Society, Hobart, August 1993.
    475 
    476 Peter H. Salus. Unix at 25. Byte Magazine, October 1994.
    477 URL: http://www.byte.com/art/9410/sec8/art3.htm
    478 
    479 Andreas Klemm, Lars Kller. If you're going to San Francisco ...
    480 Die freien BSD-Varianten von Unix. c't April 1997, page 368ff.
    481 
    482 BSD Release Announcements collection.
    483 URL: http://www.de.FreeBSD.org/de/ftp/releases/
    484 
    485 BSD Hypertext Man Pages
    486 URL: http://www.FreeBSD.org/cgi/man.cgi
    487 
    488 UNIX history graphing project
    489 URL: http://minnie.tuhs.org/Unix_History/index.html
    490 
    491 UNIX history
    492 URL: http://www.levenez.com/unix/
    493 
    494 James Howard: The BSD Family Tree
    495 URL: http://ezine.daemonnews.org/200104/bsd_family.html
    496 ("what are the differences between FreeBSD, NetBSD, and OpenBSD?")
    497 
    498 
    499 Acknowledgments
    500 ---------------
    501 
    502 Josh Gilliam for suggestions, bug fixes, and finding very old
    503 original BSD announcements from Usenet or tapes.
    504 
    505 Steven M. Schultz for providing 2.8BSD, 2.10BSD, 2.11BSD manual pages.
    506 
    507 --
    508 Copyright (c) 1997-2004 Wolfram Schneider <wosch (a] FreeBSD.ORG>
    509 URL: http://cvsweb.freebsd.org/src/share/misc/bsd-family-tree
    510 
    511 $FreeBSD: src/share/misc/bsd-family-tree,v 1.105 2006/05/26 13:19:46 maxim Exp $
    512