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bsd-family-tree revision 1.48
      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                2.79BSD
     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  |                  `-|------|-----------------|---------------------.
    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  |     |              |      | |  |        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
    215  |     |           Mac OS X  |                 |                       |
    216  |     |             10.5    |                 |                       |
    217  |     |              |      |             OpenBSD 4.2                 |
    218  |     |              |   NetBSD 4.0           |                       |
    219  | FreeBSD 6.3        |      |    |            |                       |
    220  |            \       |      |    |            |                       |
    221  *--FreeBSD    |      |      |    |            |                DragonFly 1.12.0
    222  |    7.0      |      |      |    |            |                       |
    223  |     |       |      |      |    |        OpenBSD 4.3                 |
    224  |     |       |      |      | NetBSD 4.0.1    |                DragonFly 2.0.0
    225  |     |    FreeBSD   |      |             OpenBSD 4.4                 |
    226  |     |      6.4     |      |                 |                       |
    227  |     |              |      |                 |                       |
    228  |  FreeBSD 7.1       |      |                 |                       |
    229  |     |              |      |                 |                DragonFly 2.2.0
    230  |  FreeBSD 7.2       |   NetBSD 5.0       OpenBSD 4.5                 |
    231  |             \      |      | |    \          |                       |
    232  |              |  Mac OS X  | |     \         |                       |
    233  |              |    10.6    | |      \        |                       |
    234  |              |     |      | |   NetBSD      |                DragonFly 2.4.0
    235  |              |     |      | |    5.0.1  OpenBSD 4.6                 |
    236  |              |     |      | |       |       |                       |
    237  *--FreeBSD     |     |      | |       |       |                       |
    238  |    8.0       |     |      | |       |       |                       |
    239  |     |     FreeBSD  |      | |   NetBSD      |                       |
    240  |     |       7.3    |      | |    5.0.2      |                DragonFly 2.6.0
    241  |     |        |     |      | |           OpenBSD 4.7                 |
    242  |  FreeBSD     |     |      | |               |                       |
    243  |    8.1       |     |      | |               |                       |
    244  |     |        |     |      | |               |                DragonFly 2.8.2
    245  |     |        |     |      |  \          OpenBSD 4.8                 |
    246  |     |        |     |      |  NetBSD         |                       |
    247  |  FreeBSD  FreeBSD  |      |    5.1          |                       |
    248  |    8.2      7.4    |      |     |           |               DragonFly 2.10.1
    249  |     |              |      |     |       OpenBSD 4.9                 |
    250  |     `-----.     Mac OS X  |     |           |                       |
    251  |            \      10.7    |     |           |                       |
    252  |             |      |      |     |       OpenBSD 5.0                 |
    253  *--FreeBSD    |      |      |     |           |                       |
    254  |    9.0      |      |      |  NetBSD 5.1.2   |               DragonFly 3.0.1
    255  |     |    FreeBSD   |      |                 |                       |
    256  |     |      8.3     |      |             OpenBSD 5.1                 |
    257  |     |           Mac OS X  |                 |                       |
    258  |     |             10.8    |                 |                       |
    259  |     |              |   NetBSD 6.0           |                       |
    260  |     |              |      |             OpenBSD 5.2         DragonFly 3.2.1
    261  |  FreeBSD           |      |                 |                       |
    262  |    9.1             |      |                 |                       |
    263  |                    |      |                 |                       |
    264  |                    |      |            OpenBSD 5.3          DragonFly 3.4.1
    265  |                    |      |                 |                       |
    266  |                    |      |                 |                       |
    267  |                    |      |                 |                       |
    268 FreeBSD 10 -current   |  NetBSD -current  OpenBSD -current             |
    269  |                    |      |                 |                       |
    270  v                    v      v                 v                       v
    271 
    272 Time
    273 ----------------
    274 
    275 Time tolerance +/- 6 months, depending on which book/article you read; if it
    276 was the announcement in Usenet or if it was available as tape.
    277 
    278 [44B] McKusick, Marshall Kirk, Keith Bostic, Michael J Karels,
    279 	and John Quarterman. The Design and Implementation of
    280 	the 4.4BSD Operating System.
    281 [APL] Apple website [http://www.apple.com/macosx/]
    282 [BSDI] Berkeley Software Design, Inc.
    283 [DFB] DragonFlyBSD Project, The.
    284 [DOC] README, COPYRIGHT on tape.
    285 [FBD] FreeBSD Project, The.
    286 [KB]  Keith Bostic. BSD2.10 available from Usenix. comp.unix.sources,
    287 	Volume 11, Info 4, April, 1987.
    288 [KKK] Mike Karels, Kirk McKusick, and Keith Bostic. tahoe announcement.
    289 	comp.bugs.4bsd.ucb-fixes, June 15, 1988.
    290 [KSJ] Michael J. Karels, Carl F. Smith, and William F. Jolitz.
    291 	Changes in the Kernel in 2.9BSD. Second Berkeley Software
    292 	Distribution UNIX Version 2.9, July, 1983.
    293 [NBD] NetBSD Project, The.
    294 [OBD] OpenBSD Project, The.
    295 [QCU] Salus, Peter H. A quarter century of UNIX.
    296 [SMS] Steven M. Schultz. 2.11BSD, UNIX for the PDP-11.
    297 [TUHS] The Unix Historical Society.  http://minnie.tuhs.org/Unix_History/.
    298 [USE] Usenet announcement.
    299 [WRS] Wind River Systems, Inc.
    300 [dmr] Dennis Ritchie, via E-Mail
    301 
    302 Multics                 1965
    303 UNIX                    Summer 1969
    304 				DEC PDP-7
    305 First   Edition         1971-11-03 [QCU]
    306 				DEC PDP-11/20, Assembler
    307 Second  Edition         1972-06-12 [QCU]
    308 				10 UNIX installations
    309 Third   Edition         1973-02-xx [QCU]
    310 				Pipes, 16 installations
    311 Fourth  Edition         1973-11-xx [QCU]
    312 				rewriting in C effected,
    313                                 above 30 installations
    314 Fifth   Edition         1974-06-xx [QCU]
    315 				above 50 installations
    316 Sixth   Edition         1975-05-xx [QCU]
    317 				port to DEC Vax
    318 Seventh Edition         1979-01-xx [QCU]
    319 				first portable UNIX
    320 Eighth  Edition         1985-02-xx [QCU]
    321 				VAX 11/750, VAX 11/780 [dmr]
    322 				descended from 4.1c BSD [dmr]
    323 				descended from 4.1 BSD [44B]
    324 			scooping-out and replacement of the character-device
    325 			and networking part by the streams mechanism
    326 
    327 Ninth   Edition         1986-09-xx [QCU]
    328 Tenth   Edition         1989-10-xx [QCU]
    329 
    330 1BSD                    late 1977
    331 			1978-03-09 [QCU]
    332 				PDP-11, Pascal, ex(1)
    333 				30 free copies of 1BSD sent out
    334 				35 tapes sold for 50 USD [QCU]
    335 2BSD                    mid 1978 [QCU] 1979-05-10 [TUHS]
    336 				75 2BSD tapes shipped
    337 2.79BSD			1980-04-xx [TUHS]
    338 2.8BSD			1981-07-xx [KSJ]
    339 
    340 2.8.1BSD		1982-01-xx [QCU]
    341 				set of performance improvements
    342 2.9BSD			1983-07-xx [KSJ]
    343 2.9.1BSD                1983-11-xx [TUHS]
    344 2.9BSD-Seismo		1985-08-xx [SMS]
    345 2.10BSD			1987-04-xx [KKK]
    346 2.10.1BSD		1989-01-xx [SMS]
    347 2.11BSD			1992-02-xx [SMS]
    348 2.11BSD rev #430	1999-12-13 [SMS]
    349 
    350 32V			1978-1[01]-xx [QCU]
    351 3BSD                    late 1979 [QCU] March 1980 [TUHS]
    352 				virtual memory, page replacement,
    353                         	demand paging
    354 4.0BSD                  1980-10-xx
    355 4.1BSD                  1981-07-08 [DOC]
    356 4.1aBSD                 1982-04-xx
    357 				alpha release, 100 sites, networking [44B]
    358 4.1bBSD				internal release, fast filesystem [44B]
    359 4.1cBSD                 late 1982
    360 				beta release, IPC [44B]
    361 4.2BSD                  1983-09-xx [QCU]
    362                         1983-08-03 [DOC]
    363 4.3BSD                  1986-06-xx [QCU]
    364 			1986-04-05 [KB], [DOC]
    365 4.3BSD Tahoe            1988-06-15 [QCU], [DOC]
    366 4.3BSD NET/1            1988-11-xx [QCU]
    367                         1989-01-01 [DOC]
    368 4.3BSD Reno             1990-06-29 [QCU], [DOC]
    369 4.3BSD NET/2            1991-06-28 [QCU], [DOC]
    370 
    371 BSD/386 ALPHA		1991-12-xx [BSDI]
    372 				first code released to people outside BSDI
    373 386BSD 0.0              1992-02-xx [DOC]
    374 BSD/386 0.3.1	        1992-04-xx [BSDI] first ext. beta; B customers
    375 BSD/386 0.3.3		1992-06-xx [BSDI] first CDROM version
    376 386BSD 0.1              1992-07-28 [DOC]
    377 4.4BSD Alpha            1992-07-07
    378 BSD/386 0.9.3		1992-10-xx [BSDI]
    379 				first external gamma; G customers
    380 BSD/386 0.9.4		1992-12-xx [BSDI]
    381 				would have been 1.0 except for request
    382 				for preliminary injunction
    383 BSD/386 1.0 		1993-03-xx [BSDI]
    384 				injunction denied; first official release
    385 NetBSD 0.8              1993-04-20 [NBD]
    386 4.4BSD                  1993-06-01 [USE]
    387 NetBSD 0.9              1993-08-23 [NBD]
    388 FreeBSD 1.0		1993-11-01 [FBD]
    389 FreeBSD 1.0.2		1993-11-14 [FBD]
    390 				supersedes 1.0 13 days after release.
    391 BSD/386 1.1		1994-02-xx [BSDI]
    392 4.4BSD Lite             1994-03-01 [USE]
    393 FreeBSD 1.1		1994-05-07 [FBD]
    394 FreeBSD 1.1.5		1994-06-30 [FBD]
    395 FreeBSD 1.1.5.1		1994-07-05 [FBD]
    396 				supersedes 1.1.5 5 days after release.
    397 NetBSD 1.0              1994-10-26 [NBD]
    398 386BSD 1.0              1994-11-12 [USE]
    399 FreeBSD 2.0		1994-11-23 [FBD]
    400 BSD/OS 2.0		1995-01-xx [BSDI] 4.4 lite based
    401 FreeBSD 2.0.5		1995-06-10 [FBD]
    402 BSD/OS 2.0.1		1995-06-xx [BSDI]
    403 4.4BSD Lite Release 2	1995-06-xx [44B]
    404 				the true final distribution from the CSRG
    405 FreeBSD 2.1.0		1995-11-19 [FBD]
    406 NetBSD 1.1              1995-11-26 [NBD]
    407 BSD/OS 2.1		1996-01-xx [BSDI]
    408 FreeBSD 2.1.5		1996-07-14 [FBD]
    409 NetBSD 1.2              1996-10-04 [NBD]
    410 OpenBSD 2.0             1996-10-18 [OBD]
    411 FreeBSD 2.1.6		1996-11-16 [FBD]
    412 FreeBSD 2.1.6.1		1996-11-25 [FBD] (sendmail security release)
    413 Rhapsody		1997-xx-xx
    414 FreeBSD 2.1.7		1997-02-20 [FBD]
    415 BSD/OS 3.0		1997-02-xx [BSDI] 4.4 lite2 based
    416 FreeBSD 2.2.0		1997-03-16 [FBD]
    417 FreeBSD 2.2.1		1997-03-25 [FBD]
    418 FreeBSD 2.2.2		1997-05-16 [FBD]
    419 NetBSD 1.2.1            1997-05-20 [NBD] (patch release)
    420 OpenBSD 2.1             1997-06-01 [OBD]
    421 FreeBSD 2.2.5		1997-10-22 [FBD]
    422 OpenBSD 2.2             1997-12-01 [OBD]
    423 NetBSD 1.3              1998-01-04 [NBD]
    424 FreeBSD 2.2.6		1998-03-25 [FBD]
    425 NetBSD 1.3.1            1998-03-09 [NBD] (patch release)
    426 BSD/OS 3.1		1998-03-xx [BSDI]
    427 OpenBSD 2.3             1998-05-19 [OBD]
    428 NetBSD 1.3.2            1998-05-29 [NBD] (patch release)
    429 FreeBSD 2.2.7		1998-07-22 [FBD]
    430 BSD/OS 4.0		1998-08-xx [BSDI]
    431 				2-lock MP support, ELF executables
    432 FreeBSD 3.0		1998-10-16 [FBD]
    433 				FreeBSD-3.0 is a snapshot from -current,
    434 				while 3.1 and 3.2 are from 3.x-stable which
    435 				was branched quite some time after 3.0-release
    436 FreeBSD 2.2.8           1998-11-29 [FBD]
    437 OpenBSD 2.4             1998-12-01 [OBD]
    438 NetBSD 1.3.3            1998-12-23 [NBD] (patch release)
    439 FreeBSD 3.1		1999-02-15 [FBD]
    440 BSD/OS 4.0.1		1999-03-xx [BSDI]
    441 NetBSD 1.4              1999-05-12 [NBD]
    442 FreeBSD 3.2             1999-05-17 [FBD]
    443 OpenBSD 2.5             1999-05-19 [OBD]
    444 NetBSD 1.4.1            1999-08-26 [NBD] (patch release)
    445 FreeBSD 3.3             1999-09-17 [FBD]
    446 OpenBSD 2.6             1999-12-01 [OBD]
    447 FreeBSD 3.4             1999-12-20 [FBD]
    448 BSD/OS 4.1		1999-12-xx [BSDI]
    449 FreeBSD 4.0             2000-03-13 [FBD]
    450 NetBSD 1.4.2            2000-03-19 [NBD] (patch release)
    451 OpenBSD 2.7             2000-06-15 [OBD]
    452 FreeBSD 3.5		2000-06-24 [FBD]
    453 FreeBSD 4.1		2000-07-27 [FBD]
    454 FreeBSD 3.5.1		2000-07-28 [FBD]
    455 FreeBSD 4.1.1		2000-09-25 [FBD] (a network-only patch release)
    456 FreeBSD 4.2  		2000-11-21 [FBD]
    457 NetBSD 1.4.3		2000-11-25 [NBD] (patch release)
    458 BSD/OS 4.2		2000-11-29 [BSDI]
    459 OpenBSD 2.8		2000-12-01 [OBD]
    460 NetBSD 1.5              2000-12-06 [NBD]
    461 Mac OS X 10.0           2001-03-24 [APL]
    462 FreeBSD 4.3  		2001-04-20 [FBD]
    463 OpenBSD 2.9  		2001-06-01 [OBD]
    464 NetBSD 1.5.1		2001-07-11 [NBD] (patch release)
    465 NetBSD 1.5.2		2001-09-13 [NBD] (patch release)
    466 FreeBSD 4.4  		2001-09-18 [FBD]
    467 Mac OS X 10.1		2001-09-29 [APL]
    468 OpenBSD 3.0		2001-12-01 [OBD]
    469 FreeBSD 4.5  		2002-01-29 [FBD]
    470 BSD/OS 4.3		2002-03-14 [WRS]
    471 OpenBSD 3.1		2002-05-19 [OBD]
    472 FreeBSD 4.6  		2002-06-15 [FBD]
    473 NetBSD 1.5.3		2002-07-22 [NBD] (patch release)
    474 FreeBSD 4.6.2		2002-08-15 [FBD] (patch release)
    475 Mac OS X 10.2		2002-08-23 [APL]
    476 NetBSD 1.6		2002-09-14 [NBD]
    477 FreeBSD 4.7		2002-10-08 [FBD]
    478 OpenBSD 3.2		2002-11-01 [OBD]
    479 FreeBSD 5.0		2003-01-17 [FBD]
    480 				FreeBSD 5.0 is a separate branch off of
    481 				-current, similar to 3.0.
    482 FreeBSD 4.8		2003-04-03 [FBD]
    483 NetBSD 1.6.1		2003-04-21 [NBD] (patch release)
    484 OpenBSD 3.3		2003-05-01 [OBD]
    485 BSD/OS 5.0		2003-05-?? [WRS]
    486 FreeBSD 5.1		2003-06-09 [FBD]
    487 Mac OS X 10.3		2003-10-24 [APL]
    488 FreeBSD 4.9		2003-10-28 [FBD]
    489 BSD/OS 5.1 ISE		2003-10-?? [WRS] (final version)
    490 OpenBSD 3.4		2003-11-01 [OBD]
    491 FreeBSD 5.2		2004-01-12 [FBD]
    492 FreeBSD 5.2.1		2004-02-22 [FBD] (patch release)
    493 NetBSD 1.6.2		2004-03-01 [NBD] (patch release)
    494 OpenBSD 3.5		2004-04-01 [OBD]
    495 FreeBSD 4.10		2004-05-27 [FBD]
    496 DragonFly 1.0		2004-07-12 [DFB]
    497 OpenBSD 3.6		2004-10-29 [OBD]
    498 FreeBSD 5.3		2004-11-06 [FBD]
    499 NetBSD 2.0		2004-12-09 [NBD]
    500 FreeBSD 4.11		2005-01-25 [FBD]
    501 DragonFly 1.2.0		2005-04-08 [DFB]
    502 NetBSD 2.0.2		2005-04-14 [NBD] (security/critical release)
    503 Mac OS X 10.4		2005-04-29 [APL]
    504 FreeBSD 5.4		2005-05-09 [FBD]
    505 OpenBSD 3.7		2005-05-19 [OBD]
    506 NetBSD 2.0.3		2005-10-31 [NBD] (security/critical release)
    507 OpenBSD 3.8		2005-11-01 [OBD]
    508 FreeBSD 6.0		2005-11-01 [FBD]
    509 NetBSD 2.1		2005-11-02 [NBD]
    510 NetBSD 3.0		2005-12-23 [NBD]
    511 DragonFly 1.4.0		2006-01-08 [DFB]
    512 OpenBSD 3.9		2006-05-01 [OBD]
    513 FreeBSD 6.1		2006-05-08 [FBD]
    514 FreeBSD 5.5		2006-05-25 [FBD]
    515 NetBSD 3.0.1		2006-07-24 [NBD] (security/critical release)
    516 DragonFly 1.6.0		2006-07-24 [DFB]
    517 OpenBSD 4.0		2006-11-01 [OBD]
    518 NetBSD 3.0.2		2006-11-04 [NBD] (security/critical release)
    519 NetBSD 3.1		2006-11-04 [NBD]
    520 FreeBSD 6.2		2007-01-15 [FBD]
    521 DragonFly 1.8.0		2007-01-30 [DFB]
    522 OpenBSD 4.1		2007-05-01 [OBD]
    523 DragonFly 1.10.0	2007-08-06 [DFB]
    524 Mac OS X 10.5		2007-10-26 [APL]
    525 OpenBSD 4.2		2007-11-01 [OBD]
    526 NetBSD 4.0		2007-12-19 [NBD]
    527 FreeBSD 6.3		2008-01-18 [FBD]
    528 DragonFly 1.12.0	2008-02-26 [DFB]
    529 FreeBSD 7.0		2008-02-27 [FBD]
    530 OpenBSD 4.3		2008-05-01 [OBD]
    531 DragonFly 2.0.0		2008-07-21 [DFB]
    532 OpenBSD 4.4		2008-11-01 [OBD]
    533 FreeBSD 6.4		2008-11-28 [FBD]
    534 FreeBSD 7.1		2009-01-04 [FBD]
    535 DragonFly 2.2.0		2009-02-17 [DFB]
    536 NetBSD 5.0		2009-04-29 [NBD]
    537 OpenBSD 4.5		2009-05-01 [OBD]
    538 FreeBSD 7.2		2009-05-04 [FBD]
    539 Mac OS X 10.6		2009-06-08 [APL]
    540 NetBSD 5.0.1		2009-08-02 [NBD] (security/critical release)
    541 DragonFly 2.4.0		2009-09-16 [DFB]
    542 OpenBSD 4.6		2009-10-18 [OBD]
    543 FreeBSD 8.0		2009-11-26 [FBD]
    544 NetBSD 5.0.2		2010-02-12 [NBD] (security/critical release)
    545 FreeBSD 7.3		2010-03-23 [FBD]
    546 DragonFly 2.6.0		2010-03-28 [DFB]
    547 OpenBSD 4.7		2010-05-19 [OBD]
    548 FreeBSD 8.1		2010-07-24 [FBD]
    549 DragonFly 2.8.2		2010-10-30 [DFB]
    550 OpenBSD 4.8		2010-11-01 [OBD]
    551 NetBSD 5.1		2010-11-19 [NBD]
    552 FreeBSD 7.4		2011-02-24 [FBD]
    553 FreeBSD 8.2		2011-02-24 [FBD]
    554 DragonFly 2.10.1	2011-04-26 [DFB]
    555 OpenBSD 4.9		2011-05-01 [OBD]
    556 Mac OS X 10.7		2011-07-20 [APL]
    557 OpenBSD 5.0		2011-11-01 [OBD]
    558 FreeBSD 9.0		2012-01-12 [FBD]
    559 NetBSD 5.1.2		2012-02-02 [NBD] (security/critical release)
    560 DragonFly 3.0.1		2012-02-21 [DFB]
    561 FreeBSD 8.3		2012-04-18 [FBD]
    562 OpenBSD 5.1		2012-05-01 [OBD]
    563 Mac OS X 10.8		2012-07-25 [APL]
    564 NetBSD 6.0		2012-10-17 [NBD]
    565 OpenBSD 5.2		2012-11-01 [OBD]
    566 DragonFly 3.2.1		2012-11-02 [DFB]
    567 FreeBSD 9.1		2012-12-30 [FBD]
    568 DragonFly 3.4.1		2013-04-29 [DFB]
    569 OpenBSD 5.3		2013-05-01 [OBD]
    570 
    571 Bibliography
    572 ------------------------
    573 
    574 Leffler, Samuel J., Marshall Kirk McKusick, Michael J Karels and John
    575 Quarterman. The Design and Implementation of the 4.3BSD UNIX Operating
    576 System. Reading, Mass. Addison-Wesley, 1989. ISBN 0-201-06196-1
    577 
    578 Salus, Peter H. A quarter century of UNIX. Addison-Wesley Publishing
    579 Company, Inc., 1994. ISBN 0-201-54777-5
    580 
    581 McKusick, Marshall Kirk, Keith Bostic, Michael J Karels, and John
    582 Quarterman. The Design and Implementation of the 4.4BSD Operating
    583 System. Reading, Mass. Addison-Wesley, 1996. ISBN 0-201-54979-4
    584 
    585 McKusick, Marshall Kirk, George Neville-Neil. The Design and
    586 Implementation of the FreeBSD Operating System.
    587 Addison-Wesley Professional, Published: Aug 2, 2004. ISBN 0-201-70245-2
    588 
    589 Doug McIlroy. Research Unix Reader.
    590 
    591 Michael G. Brown. The Role of BSD in the Development of Unix.
    592 Presented to the Tasmanian Unix Special Interest Group of the
    593 Australian Computer Society, Hobart, August 1993.
    594 
    595 Peter H. Salus. Unix at 25. Byte Magazine, October 1994.
    596 URL: http://www.byte.com/art/9410/sec8/art3.htm
    597 
    598 Andreas Klemm, Lars Kller. If you're going to San Francisco ...
    599 Die freien BSD-Varianten von Unix. c't April 1997, page 368ff.
    600 
    601 BSD Release Announcements collection.
    602 URL: http://www.FreeBSD.org/releases/
    603 
    604 BSD Hypertext Man Pages
    605 URL: http://www.FreeBSD.org/cgi/man.cgi
    606 
    607 UNIX history graphing project
    608 URL: http://minnie.tuhs.org/Unix_History/index.html
    609 
    610 UNIX history
    611 URL: http://www.levenez.com/unix/
    612 
    613 James Howard: The BSD Family Tree
    614 URL: http://ezine.daemonnews.org/200104/bsd_family.html
    615 ("what are the differences between FreeBSD, NetBSD, and OpenBSD?")
    616 
    617 
    618 Acknowledgments
    619 ---------------
    620 
    621 Josh Gilliam for suggestions, bug fixes, and finding very old
    622 original BSD announcements from Usenet or tapes.
    623 
    624 Steven M. Schultz for providing 2.8BSD, 2.10BSD, 2.11BSD manual pages.
    625 
    626 --
    627 Copyright (c) 1997-2012 Wolfram Schneider <wosch (a] FreeBSD.ORG>
    628 URL: http://cvsweb.freebsd.org/src/share/misc/bsd-family-tree
    629 
    630 $FreeBSD$
    631