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bsd-family-tree revision 1.49
      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           |      | |\  NetBSD 5.2  |                       |
    262  |    9.1             |      | | \             |                       |
    263  |                    |      | | NetBSD 6.0.1  |                       |
    264  |                    |      | |      |   OpenBSD 5.3          DragonFly 3.4.1
    265  |                    |      | |      |        |                       |
    266  |                    |      | | NetBSD 6.0.2  |                       |
    267  |                    |      |  `-NetBSD 6.1   |                       |
    268  |                    |      |                 |                       |
    269  |                    |      |                 |                       |
    270  |                    |      |                 |                       |
    271 FreeBSD 10 -current   |  NetBSD -current  OpenBSD -current             |
    272  |                    |      |                 |                       |
    273  v                    v      v                 v                       v
    274 
    275 Time
    276 ----------------
    277 
    278 Time tolerance +/- 6 months, depending on which book/article you read; if it
    279 was the announcement in Usenet or if it was available as tape.
    280 
    281 [44B] McKusick, Marshall Kirk, Keith Bostic, Michael J Karels,
    282 	and John Quarterman. The Design and Implementation of
    283 	the 4.4BSD Operating System.
    284 [APL] Apple website [http://www.apple.com/macosx/]
    285 [BSDI] Berkeley Software Design, Inc.
    286 [DFB] DragonFlyBSD Project, The.
    287 [DOC] README, COPYRIGHT on tape.
    288 [FBD] FreeBSD Project, The.
    289 [KB]  Keith Bostic. BSD2.10 available from Usenix. comp.unix.sources,
    290 	Volume 11, Info 4, April, 1987.
    291 [KKK] Mike Karels, Kirk McKusick, and Keith Bostic. tahoe announcement.
    292 	comp.bugs.4bsd.ucb-fixes, June 15, 1988.
    293 [KSJ] Michael J. Karels, Carl F. Smith, and William F. Jolitz.
    294 	Changes in the Kernel in 2.9BSD. Second Berkeley Software
    295 	Distribution UNIX Version 2.9, July, 1983.
    296 [NBD] NetBSD Project, The.
    297 [OBD] OpenBSD Project, The.
    298 [QCU] Salus, Peter H. A quarter century of UNIX.
    299 [SMS] Steven M. Schultz. 2.11BSD, UNIX for the PDP-11.
    300 [TUHS] The Unix Historical Society.  http://minnie.tuhs.org/Unix_History/.
    301 [USE] Usenet announcement.
    302 [WRS] Wind River Systems, Inc.
    303 [dmr] Dennis Ritchie, via E-Mail
    304 
    305 Multics                 1965
    306 UNIX                    Summer 1969
    307 				DEC PDP-7
    308 First   Edition         1971-11-03 [QCU]
    309 				DEC PDP-11/20, Assembler
    310 Second  Edition         1972-06-12 [QCU]
    311 				10 UNIX installations
    312 Third   Edition         1973-02-xx [QCU]
    313 				Pipes, 16 installations
    314 Fourth  Edition         1973-11-xx [QCU]
    315 				rewriting in C effected,
    316                                 above 30 installations
    317 Fifth   Edition         1974-06-xx [QCU]
    318 				above 50 installations
    319 Sixth   Edition         1975-05-xx [QCU]
    320 				port to DEC Vax
    321 Seventh Edition         1979-01-xx [QCU]
    322 				first portable UNIX
    323 Eighth  Edition         1985-02-xx [QCU]
    324 				VAX 11/750, VAX 11/780 [dmr]
    325 				descended from 4.1c BSD [dmr]
    326 				descended from 4.1 BSD [44B]
    327 			scooping-out and replacement of the character-device
    328 			and networking part by the streams mechanism
    329 
    330 Ninth   Edition         1986-09-xx [QCU]
    331 Tenth   Edition         1989-10-xx [QCU]
    332 
    333 1BSD                    late 1977
    334 			1978-03-09 [QCU]
    335 				PDP-11, Pascal, ex(1)
    336 				30 free copies of 1BSD sent out
    337 				35 tapes sold for 50 USD [QCU]
    338 2BSD                    mid 1978 [QCU] 1979-05-10 [TUHS]
    339 				75 2BSD tapes shipped
    340 2.79BSD			1980-04-xx [TUHS]
    341 2.8BSD			1981-07-xx [KSJ]
    342 
    343 2.8.1BSD		1982-01-xx [QCU]
    344 				set of performance improvements
    345 2.9BSD			1983-07-xx [KSJ]
    346 2.9.1BSD                1983-11-xx [TUHS]
    347 2.9BSD-Seismo		1985-08-xx [SMS]
    348 2.10BSD			1987-04-xx [KKK]
    349 2.10.1BSD		1989-01-xx [SMS]
    350 2.11BSD			1992-02-xx [SMS]
    351 2.11BSD rev #430	1999-12-13 [SMS]
    352 
    353 32V			1978-1[01]-xx [QCU]
    354 3BSD                    late 1979 [QCU] March 1980 [TUHS]
    355 				virtual memory, page replacement,
    356                         	demand paging
    357 4.0BSD                  1980-10-xx
    358 4.1BSD                  1981-07-08 [DOC]
    359 4.1aBSD                 1982-04-xx
    360 				alpha release, 100 sites, networking [44B]
    361 4.1bBSD				internal release, fast filesystem [44B]
    362 4.1cBSD                 late 1982
    363 				beta release, IPC [44B]
    364 4.2BSD                  1983-09-xx [QCU]
    365                         1983-08-03 [DOC]
    366 4.3BSD                  1986-06-xx [QCU]
    367 			1986-04-05 [KB], [DOC]
    368 4.3BSD Tahoe            1988-06-15 [QCU], [DOC]
    369 4.3BSD NET/1            1988-11-xx [QCU]
    370                         1989-01-01 [DOC]
    371 4.3BSD Reno             1990-06-29 [QCU], [DOC]
    372 4.3BSD NET/2            1991-06-28 [QCU], [DOC]
    373 
    374 BSD/386 ALPHA		1991-12-xx [BSDI]
    375 				first code released to people outside BSDI
    376 386BSD 0.0              1992-02-xx [DOC]
    377 BSD/386 0.3.1	        1992-04-xx [BSDI] first ext. beta; B customers
    378 BSD/386 0.3.3		1992-06-xx [BSDI] first CDROM version
    379 386BSD 0.1              1992-07-28 [DOC]
    380 4.4BSD Alpha            1992-07-07
    381 BSD/386 0.9.3		1992-10-xx [BSDI]
    382 				first external gamma; G customers
    383 BSD/386 0.9.4		1992-12-xx [BSDI]
    384 				would have been 1.0 except for request
    385 				for preliminary injunction
    386 BSD/386 1.0 		1993-03-xx [BSDI]
    387 				injunction denied; first official release
    388 NetBSD 0.8              1993-04-20 [NBD]
    389 4.4BSD                  1993-06-01 [USE]
    390 NetBSD 0.9              1993-08-23 [NBD]
    391 FreeBSD 1.0		1993-11-01 [FBD]
    392 FreeBSD 1.0.2		1993-11-14 [FBD]
    393 				supersedes 1.0 13 days after release.
    394 BSD/386 1.1		1994-02-xx [BSDI]
    395 4.4BSD Lite             1994-03-01 [USE]
    396 FreeBSD 1.1		1994-05-07 [FBD]
    397 FreeBSD 1.1.5		1994-06-30 [FBD]
    398 FreeBSD 1.1.5.1		1994-07-05 [FBD]
    399 				supersedes 1.1.5 5 days after release.
    400 NetBSD 1.0              1994-10-26 [NBD]
    401 386BSD 1.0              1994-11-12 [USE]
    402 FreeBSD 2.0		1994-11-23 [FBD]
    403 BSD/OS 2.0		1995-01-xx [BSDI] 4.4 lite based
    404 FreeBSD 2.0.5		1995-06-10 [FBD]
    405 BSD/OS 2.0.1		1995-06-xx [BSDI]
    406 4.4BSD Lite Release 2	1995-06-xx [44B]
    407 				the true final distribution from the CSRG
    408 FreeBSD 2.1.0		1995-11-19 [FBD]
    409 NetBSD 1.1              1995-11-26 [NBD]
    410 BSD/OS 2.1		1996-01-xx [BSDI]
    411 FreeBSD 2.1.5		1996-07-14 [FBD]
    412 NetBSD 1.2              1996-10-04 [NBD]
    413 OpenBSD 2.0             1996-10-18 [OBD]
    414 FreeBSD 2.1.6		1996-11-16 [FBD]
    415 FreeBSD 2.1.6.1		1996-11-25 [FBD] (sendmail security release)
    416 Rhapsody		1997-xx-xx
    417 FreeBSD 2.1.7		1997-02-20 [FBD]
    418 BSD/OS 3.0		1997-02-xx [BSDI] 4.4 lite2 based
    419 FreeBSD 2.2.0		1997-03-16 [FBD]
    420 FreeBSD 2.2.1		1997-03-25 [FBD]
    421 FreeBSD 2.2.2		1997-05-16 [FBD]
    422 NetBSD 1.2.1            1997-05-20 [NBD] (patch release)
    423 OpenBSD 2.1             1997-06-01 [OBD]
    424 FreeBSD 2.2.5		1997-10-22 [FBD]
    425 OpenBSD 2.2             1997-12-01 [OBD]
    426 NetBSD 1.3              1998-01-04 [NBD]
    427 FreeBSD 2.2.6		1998-03-25 [FBD]
    428 NetBSD 1.3.1            1998-03-09 [NBD] (patch release)
    429 BSD/OS 3.1		1998-03-xx [BSDI]
    430 OpenBSD 2.3             1998-05-19 [OBD]
    431 NetBSD 1.3.2            1998-05-29 [NBD] (patch release)
    432 FreeBSD 2.2.7		1998-07-22 [FBD]
    433 BSD/OS 4.0		1998-08-xx [BSDI]
    434 				2-lock MP support, ELF executables
    435 FreeBSD 3.0		1998-10-16 [FBD]
    436 				FreeBSD-3.0 is a snapshot from -current,
    437 				while 3.1 and 3.2 are from 3.x-stable which
    438 				was branched quite some time after 3.0-release
    439 FreeBSD 2.2.8           1998-11-29 [FBD]
    440 OpenBSD 2.4             1998-12-01 [OBD]
    441 NetBSD 1.3.3            1998-12-23 [NBD] (patch release)
    442 FreeBSD 3.1		1999-02-15 [FBD]
    443 BSD/OS 4.0.1		1999-03-xx [BSDI]
    444 NetBSD 1.4              1999-05-12 [NBD]
    445 FreeBSD 3.2             1999-05-17 [FBD]
    446 OpenBSD 2.5             1999-05-19 [OBD]
    447 NetBSD 1.4.1            1999-08-26 [NBD] (patch release)
    448 FreeBSD 3.3             1999-09-17 [FBD]
    449 OpenBSD 2.6             1999-12-01 [OBD]
    450 FreeBSD 3.4             1999-12-20 [FBD]
    451 BSD/OS 4.1		1999-12-xx [BSDI]
    452 FreeBSD 4.0             2000-03-13 [FBD]
    453 NetBSD 1.4.2            2000-03-19 [NBD] (patch release)
    454 OpenBSD 2.7             2000-06-15 [OBD]
    455 FreeBSD 3.5		2000-06-24 [FBD]
    456 FreeBSD 4.1		2000-07-27 [FBD]
    457 FreeBSD 3.5.1		2000-07-28 [FBD]
    458 FreeBSD 4.1.1		2000-09-25 [FBD] (a network-only patch release)
    459 FreeBSD 4.2  		2000-11-21 [FBD]
    460 NetBSD 1.4.3		2000-11-25 [NBD] (patch release)
    461 BSD/OS 4.2		2000-11-29 [BSDI]
    462 OpenBSD 2.8		2000-12-01 [OBD]
    463 NetBSD 1.5              2000-12-06 [NBD]
    464 Mac OS X 10.0           2001-03-24 [APL]
    465 FreeBSD 4.3  		2001-04-20 [FBD]
    466 OpenBSD 2.9  		2001-06-01 [OBD]
    467 NetBSD 1.5.1		2001-07-11 [NBD] (patch release)
    468 NetBSD 1.5.2		2001-09-13 [NBD] (patch release)
    469 FreeBSD 4.4  		2001-09-18 [FBD]
    470 Mac OS X 10.1		2001-09-29 [APL]
    471 OpenBSD 3.0		2001-12-01 [OBD]
    472 FreeBSD 4.5  		2002-01-29 [FBD]
    473 BSD/OS 4.3		2002-03-14 [WRS]
    474 OpenBSD 3.1		2002-05-19 [OBD]
    475 FreeBSD 4.6  		2002-06-15 [FBD]
    476 NetBSD 1.5.3		2002-07-22 [NBD] (patch release)
    477 FreeBSD 4.6.2		2002-08-15 [FBD] (patch release)
    478 Mac OS X 10.2		2002-08-23 [APL]
    479 NetBSD 1.6		2002-09-14 [NBD]
    480 FreeBSD 4.7		2002-10-08 [FBD]
    481 OpenBSD 3.2		2002-11-01 [OBD]
    482 FreeBSD 5.0		2003-01-17 [FBD]
    483 				FreeBSD 5.0 is a separate branch off of
    484 				-current, similar to 3.0.
    485 FreeBSD 4.8		2003-04-03 [FBD]
    486 NetBSD 1.6.1		2003-04-21 [NBD] (patch release)
    487 OpenBSD 3.3		2003-05-01 [OBD]
    488 BSD/OS 5.0		2003-05-?? [WRS]
    489 FreeBSD 5.1		2003-06-09 [FBD]
    490 Mac OS X 10.3		2003-10-24 [APL]
    491 FreeBSD 4.9		2003-10-28 [FBD]
    492 BSD/OS 5.1 ISE		2003-10-?? [WRS] (final version)
    493 OpenBSD 3.4		2003-11-01 [OBD]
    494 FreeBSD 5.2		2004-01-12 [FBD]
    495 FreeBSD 5.2.1		2004-02-22 [FBD] (patch release)
    496 NetBSD 1.6.2		2004-03-01 [NBD] (patch release)
    497 OpenBSD 3.5		2004-04-01 [OBD]
    498 FreeBSD 4.10		2004-05-27 [FBD]
    499 DragonFly 1.0		2004-07-12 [DFB]
    500 OpenBSD 3.6		2004-10-29 [OBD]
    501 FreeBSD 5.3		2004-11-06 [FBD]
    502 NetBSD 2.0		2004-12-09 [NBD]
    503 FreeBSD 4.11		2005-01-25 [FBD]
    504 DragonFly 1.2.0		2005-04-08 [DFB]
    505 NetBSD 2.0.2		2005-04-14 [NBD] (security/critical release)
    506 Mac OS X 10.4		2005-04-29 [APL]
    507 FreeBSD 5.4		2005-05-09 [FBD]
    508 OpenBSD 3.7		2005-05-19 [OBD]
    509 NetBSD 2.0.3		2005-10-31 [NBD] (security/critical release)
    510 OpenBSD 3.8		2005-11-01 [OBD]
    511 FreeBSD 6.0		2005-11-01 [FBD]
    512 NetBSD 2.1		2005-11-02 [NBD]
    513 NetBSD 3.0		2005-12-23 [NBD]
    514 DragonFly 1.4.0		2006-01-08 [DFB]
    515 OpenBSD 3.9		2006-05-01 [OBD]
    516 FreeBSD 6.1		2006-05-08 [FBD]
    517 FreeBSD 5.5		2006-05-25 [FBD]
    518 NetBSD 3.0.1		2006-07-24 [NBD] (security/critical release)
    519 DragonFly 1.6.0		2006-07-24 [DFB]
    520 OpenBSD 4.0		2006-11-01 [OBD]
    521 NetBSD 3.0.2		2006-11-04 [NBD] (security/critical release)
    522 NetBSD 3.1		2006-11-04 [NBD]
    523 FreeBSD 6.2		2007-01-15 [FBD]
    524 DragonFly 1.8.0		2007-01-30 [DFB]
    525 OpenBSD 4.1		2007-05-01 [OBD]
    526 DragonFly 1.10.0	2007-08-06 [DFB]
    527 Mac OS X 10.5		2007-10-26 [APL]
    528 OpenBSD 4.2		2007-11-01 [OBD]
    529 NetBSD 4.0		2007-12-19 [NBD]
    530 FreeBSD 6.3		2008-01-18 [FBD]
    531 DragonFly 1.12.0	2008-02-26 [DFB]
    532 FreeBSD 7.0		2008-02-27 [FBD]
    533 OpenBSD 4.3		2008-05-01 [OBD]
    534 DragonFly 2.0.0		2008-07-21 [DFB]
    535 OpenBSD 4.4		2008-11-01 [OBD]
    536 FreeBSD 6.4		2008-11-28 [FBD]
    537 FreeBSD 7.1		2009-01-04 [FBD]
    538 DragonFly 2.2.0		2009-02-17 [DFB]
    539 NetBSD 5.0		2009-04-29 [NBD]
    540 OpenBSD 4.5		2009-05-01 [OBD]
    541 FreeBSD 7.2		2009-05-04 [FBD]
    542 Mac OS X 10.6		2009-06-08 [APL]
    543 NetBSD 5.0.1		2009-08-02 [NBD] (security/critical release)
    544 DragonFly 2.4.0		2009-09-16 [DFB]
    545 OpenBSD 4.6		2009-10-18 [OBD]
    546 FreeBSD 8.0		2009-11-26 [FBD]
    547 NetBSD 5.0.2		2010-02-12 [NBD] (security/critical release)
    548 FreeBSD 7.3		2010-03-23 [FBD]
    549 DragonFly 2.6.0		2010-03-28 [DFB]
    550 OpenBSD 4.7		2010-05-19 [OBD]
    551 FreeBSD 8.1		2010-07-24 [FBD]
    552 DragonFly 2.8.2		2010-10-30 [DFB]
    553 OpenBSD 4.8		2010-11-01 [OBD]
    554 NetBSD 5.1		2010-11-19 [NBD]
    555 FreeBSD 7.4		2011-02-24 [FBD]
    556 FreeBSD 8.2		2011-02-24 [FBD]
    557 DragonFly 2.10.1	2011-04-26 [DFB]
    558 OpenBSD 4.9		2011-05-01 [OBD]
    559 Mac OS X 10.7		2011-07-20 [APL]
    560 OpenBSD 5.0		2011-11-01 [OBD]
    561 FreeBSD 9.0		2012-01-12 [FBD]
    562 NetBSD 5.1.2		2012-02-02 [NBD] (security/critical release)
    563 DragonFly 3.0.1		2012-02-21 [DFB]
    564 FreeBSD 8.3		2012-04-18 [FBD]
    565 OpenBSD 5.1		2012-05-01 [OBD]
    566 Mac OS X 10.8		2012-07-25 [APL]
    567 NetBSD 6.0		2012-10-17 [NBD]
    568 OpenBSD 5.2		2012-11-01 [OBD]
    569 DragonFly 3.2.1		2012-11-02 [DFB]
    570 NetBSD 5.2		2012-12-03 [NBD]
    571 NetBSD 6.0.1		2012-12-26 [NBD] (security/critical release)
    572 FreeBSD 9.1		2012-12-30 [FBD]
    573 DragonFly 3.4.1		2013-04-29 [DFB]
    574 OpenBSD 5.3		2013-05-01 [OBD]
    575 NetBSD 6.0.2		2013-05-18 [NBD] (security/critical release)
    576 NetBSD 6.1		2013-05-18 [NBD]
    577 
    578 Bibliography
    579 ------------------------
    580 
    581 Leffler, Samuel J., Marshall Kirk McKusick, Michael J Karels and John
    582 Quarterman. The Design and Implementation of the 4.3BSD UNIX Operating
    583 System. Reading, Mass. Addison-Wesley, 1989. ISBN 0-201-06196-1
    584 
    585 Salus, Peter H. A quarter century of UNIX. Addison-Wesley Publishing
    586 Company, Inc., 1994. ISBN 0-201-54777-5
    587 
    588 McKusick, Marshall Kirk, Keith Bostic, Michael J Karels, and John
    589 Quarterman. The Design and Implementation of the 4.4BSD Operating
    590 System. Reading, Mass. Addison-Wesley, 1996. ISBN 0-201-54979-4
    591 
    592 McKusick, Marshall Kirk, George Neville-Neil. The Design and
    593 Implementation of the FreeBSD Operating System.
    594 Addison-Wesley Professional, Published: Aug 2, 2004. ISBN 0-201-70245-2
    595 
    596 Doug McIlroy. Research Unix Reader.
    597 
    598 Michael G. Brown. The Role of BSD in the Development of Unix.
    599 Presented to the Tasmanian Unix Special Interest Group of the
    600 Australian Computer Society, Hobart, August 1993.
    601 
    602 Peter H. Salus. Unix at 25. Byte Magazine, October 1994.
    603 URL: http://www.byte.com/art/9410/sec8/art3.htm
    604 
    605 Andreas Klemm, Lars Kller. If you're going to San Francisco ...
    606 Die freien BSD-Varianten von Unix. c't April 1997, page 368ff.
    607 
    608 BSD Release Announcements collection.
    609 URL: http://www.FreeBSD.org/releases/
    610 
    611 BSD Hypertext Man Pages
    612 URL: http://www.FreeBSD.org/cgi/man.cgi
    613 
    614 UNIX history graphing project
    615 URL: http://minnie.tuhs.org/Unix_History/index.html
    616 
    617 UNIX history
    618 URL: http://www.levenez.com/unix/
    619 
    620 James Howard: The BSD Family Tree
    621 URL: http://ezine.daemonnews.org/200104/bsd_family.html
    622 ("what are the differences between FreeBSD, NetBSD, and OpenBSD?")
    623 
    624 
    625 Acknowledgments
    626 ---------------
    627 
    628 Josh Gilliam for suggestions, bug fixes, and finding very old
    629 original BSD announcements from Usenet or tapes.
    630 
    631 Steven M. Schultz for providing 2.8BSD, 2.10BSD, 2.11BSD manual pages.
    632 
    633 --
    634 Copyright (c) 1997-2012 Wolfram Schneider <wosch (a] FreeBSD.ORG>
    635 URL: http://cvsweb.freebsd.org/src/share/misc/bsd-family-tree
    636 
    637 $FreeBSD$
    638