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bsd-family-tree revision 1.50
      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          |                DragonFly 2.0.0
    225  |     |    FreeBSD   |      |  4.0.1      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      |               DragonFly 3.0.1
    255  |     |    FreeBSD   |      | |    5.1.2      |                       |
    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      |                       |
    262  |    9.1             |      | | |   5.2       |                       |
    263  |                    |      | |  \            |                       |
    264  |                    |      | |   NetBSD      |                       |
    265  |                    |      | |    6.0.1      |                       |
    266  |                    |      | |      |   OpenBSD 5.3          DragonFly 3.4.1
    267  |                    |      | |   NetBSD      |                       |
    268  |                    |      | |    6.0.2      |                       |
    269  |                    |      | |               |                       |
    270  |                    |      |  `-NetBSD 6.1   |                       |
    271  |                    |      |                 |                       |
    272  |                    |      |                 |                       |
    273  |                    |      |                 |                       |
    274 FreeBSD 10 -current   |  NetBSD -current  OpenBSD -current             |
    275  |                    |      |                 |                       |
    276  v                    v      v                 v                       v
    277 
    278 Time
    279 ----------------
    280 
    281 Time tolerance +/- 6 months, depending on which book/article you read; if it
    282 was the announcement in Usenet or if it was available as tape.
    283 
    284 [44B] McKusick, Marshall Kirk, Keith Bostic, Michael J Karels,
    285 	and John Quarterman. The Design and Implementation of
    286 	the 4.4BSD Operating System.
    287 [APL] Apple website [http://www.apple.com/macosx/]
    288 [BSDI] Berkeley Software Design, Inc.
    289 [DFB] DragonFlyBSD Project, The.
    290 [DOC] README, COPYRIGHT on tape.
    291 [FBD] FreeBSD Project, The.
    292 [KB]  Keith Bostic. BSD2.10 available from Usenix. comp.unix.sources,
    293 	Volume 11, Info 4, April, 1987.
    294 [KKK] Mike Karels, Kirk McKusick, and Keith Bostic. tahoe announcement.
    295 	comp.bugs.4bsd.ucb-fixes, June 15, 1988.
    296 [KSJ] Michael J. Karels, Carl F. Smith, and William F. Jolitz.
    297 	Changes in the Kernel in 2.9BSD. Second Berkeley Software
    298 	Distribution UNIX Version 2.9, July, 1983.
    299 [NBD] NetBSD Project, The.
    300 [OBD] OpenBSD Project, The.
    301 [QCU] Salus, Peter H. A quarter century of UNIX.
    302 [SMS] Steven M. Schultz. 2.11BSD, UNIX for the PDP-11.
    303 [TUHS] The Unix Historical Society.  http://minnie.tuhs.org/Unix_History/.
    304 [USE] Usenet announcement.
    305 [WRS] Wind River Systems, Inc.
    306 [dmr] Dennis Ritchie, via E-Mail
    307 
    308 Multics                 1965
    309 UNIX                    Summer 1969
    310 				DEC PDP-7
    311 First   Edition         1971-11-03 [QCU]
    312 				DEC PDP-11/20, Assembler
    313 Second  Edition         1972-06-12 [QCU]
    314 				10 UNIX installations
    315 Third   Edition         1973-02-xx [QCU]
    316 				Pipes, 16 installations
    317 Fourth  Edition         1973-11-xx [QCU]
    318 				rewriting in C effected,
    319                                 above 30 installations
    320 Fifth   Edition         1974-06-xx [QCU]
    321 				above 50 installations
    322 Sixth   Edition         1975-05-xx [QCU]
    323 				port to DEC Vax
    324 Seventh Edition         1979-01-xx [QCU]
    325 				first portable UNIX
    326 Eighth  Edition         1985-02-xx [QCU]
    327 				VAX 11/750, VAX 11/780 [dmr]
    328 				descended from 4.1c BSD [dmr]
    329 				descended from 4.1 BSD [44B]
    330 			scooping-out and replacement of the character-device
    331 			and networking part by the streams mechanism
    332 
    333 Ninth   Edition         1986-09-xx [QCU]
    334 Tenth   Edition         1989-10-xx [QCU]
    335 
    336 1BSD                    late 1977
    337 			1978-03-09 [QCU]
    338 				PDP-11, Pascal, ex(1)
    339 				30 free copies of 1BSD sent out
    340 				35 tapes sold for 50 USD [QCU]
    341 2BSD                    mid 1978 [QCU] 1979-05-10 [TUHS]
    342 				75 2BSD tapes shipped
    343 2.79BSD			1980-04-xx [TUHS]
    344 2.8BSD			1981-07-xx [KSJ]
    345 
    346 2.8.1BSD		1982-01-xx [QCU]
    347 				set of performance improvements
    348 2.9BSD			1983-07-xx [KSJ]
    349 2.9.1BSD                1983-11-xx [TUHS]
    350 2.9BSD-Seismo		1985-08-xx [SMS]
    351 2.10BSD			1987-04-xx [KKK]
    352 2.10.1BSD		1989-01-xx [SMS]
    353 2.11BSD			1992-02-xx [SMS]
    354 2.11BSD rev #430	1999-12-13 [SMS]
    355 
    356 32V			1978-1[01]-xx [QCU]
    357 3BSD                    late 1979 [QCU] March 1980 [TUHS]
    358 				virtual memory, page replacement,
    359                         	demand paging
    360 4.0BSD                  1980-10-xx
    361 4.1BSD                  1981-07-08 [DOC]
    362 4.1aBSD                 1982-04-xx
    363 				alpha release, 100 sites, networking [44B]
    364 4.1bBSD				internal release, fast filesystem [44B]
    365 4.1cBSD                 late 1982
    366 				beta release, IPC [44B]
    367 4.2BSD                  1983-09-xx [QCU]
    368                         1983-08-03 [DOC]
    369 4.3BSD                  1986-06-xx [QCU]
    370 			1986-04-05 [KB], [DOC]
    371 4.3BSD Tahoe            1988-06-15 [QCU], [DOC]
    372 4.3BSD NET/1            1988-11-xx [QCU]
    373                         1989-01-01 [DOC]
    374 4.3BSD Reno             1990-06-29 [QCU], [DOC]
    375 4.3BSD NET/2            1991-06-28 [QCU], [DOC]
    376 
    377 BSD/386 ALPHA		1991-12-xx [BSDI]
    378 				first code released to people outside BSDI
    379 386BSD 0.0              1992-02-xx [DOC]
    380 BSD/386 0.3.1	        1992-04-xx [BSDI] first ext. beta; B customers
    381 BSD/386 0.3.3		1992-06-xx [BSDI] first CDROM version
    382 386BSD 0.1              1992-07-28 [DOC]
    383 4.4BSD Alpha            1992-07-07
    384 BSD/386 0.9.3		1992-10-xx [BSDI]
    385 				first external gamma; G customers
    386 BSD/386 0.9.4		1992-12-xx [BSDI]
    387 				would have been 1.0 except for request
    388 				for preliminary injunction
    389 BSD/386 1.0 		1993-03-xx [BSDI]
    390 				injunction denied; first official release
    391 NetBSD 0.8              1993-04-20 [NBD]
    392 4.4BSD                  1993-06-01 [USE]
    393 NetBSD 0.9              1993-08-23 [NBD]
    394 FreeBSD 1.0		1993-11-01 [FBD]
    395 FreeBSD 1.0.2		1993-11-14 [FBD]
    396 				supersedes 1.0 13 days after release.
    397 BSD/386 1.1		1994-02-xx [BSDI]
    398 4.4BSD Lite             1994-03-01 [USE]
    399 FreeBSD 1.1		1994-05-07 [FBD]
    400 FreeBSD 1.1.5		1994-06-30 [FBD]
    401 FreeBSD 1.1.5.1		1994-07-05 [FBD]
    402 				supersedes 1.1.5 5 days after release.
    403 NetBSD 1.0              1994-10-26 [NBD]
    404 386BSD 1.0              1994-11-12 [USE]
    405 FreeBSD 2.0		1994-11-23 [FBD]
    406 BSD/OS 2.0		1995-01-xx [BSDI] 4.4 lite based
    407 FreeBSD 2.0.5		1995-06-10 [FBD]
    408 BSD/OS 2.0.1		1995-06-xx [BSDI]
    409 4.4BSD Lite Release 2	1995-06-xx [44B]
    410 				the true final distribution from the CSRG
    411 FreeBSD 2.1.0		1995-11-19 [FBD]
    412 NetBSD 1.1              1995-11-26 [NBD]
    413 BSD/OS 2.1		1996-01-xx [BSDI]
    414 FreeBSD 2.1.5		1996-07-14 [FBD]
    415 NetBSD 1.2              1996-10-04 [NBD]
    416 OpenBSD 2.0             1996-10-18 [OBD]
    417 FreeBSD 2.1.6		1996-11-16 [FBD]
    418 FreeBSD 2.1.6.1		1996-11-25 [FBD] (sendmail security release)
    419 Rhapsody		1997-xx-xx
    420 FreeBSD 2.1.7		1997-02-20 [FBD]
    421 BSD/OS 3.0		1997-02-xx [BSDI] 4.4 lite2 based
    422 FreeBSD 2.2.0		1997-03-16 [FBD]
    423 FreeBSD 2.2.1		1997-03-25 [FBD]
    424 FreeBSD 2.2.2		1997-05-16 [FBD]
    425 NetBSD 1.2.1            1997-05-20 [NBD] (patch release)
    426 OpenBSD 2.1             1997-06-01 [OBD]
    427 FreeBSD 2.2.5		1997-10-22 [FBD]
    428 OpenBSD 2.2             1997-12-01 [OBD]
    429 NetBSD 1.3              1998-01-04 [NBD]
    430 FreeBSD 2.2.6		1998-03-25 [FBD]
    431 NetBSD 1.3.1            1998-03-09 [NBD] (patch release)
    432 BSD/OS 3.1		1998-03-xx [BSDI]
    433 OpenBSD 2.3             1998-05-19 [OBD]
    434 NetBSD 1.3.2            1998-05-29 [NBD] (patch release)
    435 FreeBSD 2.2.7		1998-07-22 [FBD]
    436 BSD/OS 4.0		1998-08-xx [BSDI]
    437 				2-lock MP support, ELF executables
    438 FreeBSD 3.0		1998-10-16 [FBD]
    439 				FreeBSD-3.0 is a snapshot from -current,
    440 				while 3.1 and 3.2 are from 3.x-stable which
    441 				was branched quite some time after 3.0-release
    442 FreeBSD 2.2.8           1998-11-29 [FBD]
    443 OpenBSD 2.4             1998-12-01 [OBD]
    444 NetBSD 1.3.3            1998-12-23 [NBD] (patch release)
    445 FreeBSD 3.1		1999-02-15 [FBD]
    446 BSD/OS 4.0.1		1999-03-xx [BSDI]
    447 NetBSD 1.4              1999-05-12 [NBD]
    448 FreeBSD 3.2             1999-05-17 [FBD]
    449 OpenBSD 2.5             1999-05-19 [OBD]
    450 NetBSD 1.4.1            1999-08-26 [NBD] (patch release)
    451 FreeBSD 3.3             1999-09-17 [FBD]
    452 OpenBSD 2.6             1999-12-01 [OBD]
    453 FreeBSD 3.4             1999-12-20 [FBD]
    454 BSD/OS 4.1		1999-12-xx [BSDI]
    455 FreeBSD 4.0             2000-03-13 [FBD]
    456 NetBSD 1.4.2            2000-03-19 [NBD] (patch release)
    457 OpenBSD 2.7             2000-06-15 [OBD]
    458 FreeBSD 3.5		2000-06-24 [FBD]
    459 FreeBSD 4.1		2000-07-27 [FBD]
    460 FreeBSD 3.5.1		2000-07-28 [FBD]
    461 FreeBSD 4.1.1		2000-09-25 [FBD] (a network-only patch release)
    462 FreeBSD 4.2  		2000-11-21 [FBD]
    463 NetBSD 1.4.3		2000-11-25 [NBD] (patch release)
    464 BSD/OS 4.2		2000-11-29 [BSDI]
    465 OpenBSD 2.8		2000-12-01 [OBD]
    466 NetBSD 1.5              2000-12-06 [NBD]
    467 Mac OS X 10.0           2001-03-24 [APL]
    468 FreeBSD 4.3  		2001-04-20 [FBD]
    469 OpenBSD 2.9  		2001-06-01 [OBD]
    470 NetBSD 1.5.1		2001-07-11 [NBD] (patch release)
    471 NetBSD 1.5.2		2001-09-13 [NBD] (patch release)
    472 FreeBSD 4.4  		2001-09-18 [FBD]
    473 Mac OS X 10.1		2001-09-29 [APL]
    474 OpenBSD 3.0		2001-12-01 [OBD]
    475 FreeBSD 4.5  		2002-01-29 [FBD]
    476 BSD/OS 4.3		2002-03-14 [WRS]
    477 OpenBSD 3.1		2002-05-19 [OBD]
    478 FreeBSD 4.6  		2002-06-15 [FBD]
    479 NetBSD 1.5.3		2002-07-22 [NBD] (patch release)
    480 FreeBSD 4.6.2		2002-08-15 [FBD] (patch release)
    481 Mac OS X 10.2		2002-08-23 [APL]
    482 NetBSD 1.6		2002-09-14 [NBD]
    483 FreeBSD 4.7		2002-10-08 [FBD]
    484 OpenBSD 3.2		2002-11-01 [OBD]
    485 FreeBSD 5.0		2003-01-17 [FBD]
    486 				FreeBSD 5.0 is a separate branch off of
    487 				-current, similar to 3.0.
    488 FreeBSD 4.8		2003-04-03 [FBD]
    489 NetBSD 1.6.1		2003-04-21 [NBD] (patch release)
    490 OpenBSD 3.3		2003-05-01 [OBD]
    491 BSD/OS 5.0		2003-05-?? [WRS]
    492 FreeBSD 5.1		2003-06-09 [FBD]
    493 Mac OS X 10.3		2003-10-24 [APL]
    494 FreeBSD 4.9		2003-10-28 [FBD]
    495 BSD/OS 5.1 ISE		2003-10-?? [WRS] (final version)
    496 OpenBSD 3.4		2003-11-01 [OBD]
    497 FreeBSD 5.2		2004-01-12 [FBD]
    498 FreeBSD 5.2.1		2004-02-22 [FBD] (patch release)
    499 NetBSD 1.6.2		2004-03-01 [NBD] (patch release)
    500 OpenBSD 3.5		2004-04-01 [OBD]
    501 FreeBSD 4.10		2004-05-27 [FBD]
    502 DragonFly 1.0		2004-07-12 [DFB]
    503 OpenBSD 3.6		2004-10-29 [OBD]
    504 FreeBSD 5.3		2004-11-06 [FBD]
    505 NetBSD 2.0		2004-12-09 [NBD]
    506 FreeBSD 4.11		2005-01-25 [FBD]
    507 DragonFly 1.2.0		2005-04-08 [DFB]
    508 NetBSD 2.0.2		2005-04-14 [NBD] (security/critical release)
    509 Mac OS X 10.4		2005-04-29 [APL]
    510 FreeBSD 5.4		2005-05-09 [FBD]
    511 OpenBSD 3.7		2005-05-19 [OBD]
    512 NetBSD 2.0.3		2005-10-31 [NBD] (security/critical release)
    513 OpenBSD 3.8		2005-11-01 [OBD]
    514 FreeBSD 6.0		2005-11-01 [FBD]
    515 NetBSD 2.1		2005-11-02 [NBD]
    516 NetBSD 3.0		2005-12-23 [NBD]
    517 DragonFly 1.4.0		2006-01-08 [DFB]
    518 OpenBSD 3.9		2006-05-01 [OBD]
    519 FreeBSD 6.1		2006-05-08 [FBD]
    520 FreeBSD 5.5		2006-05-25 [FBD]
    521 NetBSD 3.0.1		2006-07-24 [NBD] (security/critical release)
    522 DragonFly 1.6.0		2006-07-24 [DFB]
    523 OpenBSD 4.0		2006-11-01 [OBD]
    524 NetBSD 3.0.2		2006-11-04 [NBD] (security/critical release)
    525 NetBSD 3.1		2006-11-04 [NBD]
    526 FreeBSD 6.2		2007-01-15 [FBD]
    527 DragonFly 1.8.0		2007-01-30 [DFB]
    528 OpenBSD 4.1		2007-05-01 [OBD]
    529 DragonFly 1.10.0	2007-08-06 [DFB]
    530 Mac OS X 10.5		2007-10-26 [APL]
    531 OpenBSD 4.2		2007-11-01 [OBD]
    532 NetBSD 4.0		2007-12-19 [NBD]
    533 FreeBSD 6.3		2008-01-18 [FBD]
    534 DragonFly 1.12.0	2008-02-26 [DFB]
    535 FreeBSD 7.0		2008-02-27 [FBD]
    536 OpenBSD 4.3		2008-05-01 [OBD]
    537 DragonFly 2.0.0		2008-07-21 [DFB]
    538 OpenBSD 4.4		2008-11-01 [OBD]
    539 FreeBSD 6.4		2008-11-28 [FBD]
    540 FreeBSD 7.1		2009-01-04 [FBD]
    541 DragonFly 2.2.0		2009-02-17 [DFB]
    542 NetBSD 5.0		2009-04-29 [NBD]
    543 OpenBSD 4.5		2009-05-01 [OBD]
    544 FreeBSD 7.2		2009-05-04 [FBD]
    545 Mac OS X 10.6		2009-06-08 [APL]
    546 NetBSD 5.0.1		2009-08-02 [NBD] (security/critical release)
    547 DragonFly 2.4.0		2009-09-16 [DFB]
    548 OpenBSD 4.6		2009-10-18 [OBD]
    549 FreeBSD 8.0		2009-11-26 [FBD]
    550 NetBSD 5.0.2		2010-02-12 [NBD] (security/critical release)
    551 FreeBSD 7.3		2010-03-23 [FBD]
    552 DragonFly 2.6.0		2010-03-28 [DFB]
    553 OpenBSD 4.7		2010-05-19 [OBD]
    554 FreeBSD 8.1		2010-07-24 [FBD]
    555 DragonFly 2.8.2		2010-10-30 [DFB]
    556 OpenBSD 4.8		2010-11-01 [OBD]
    557 NetBSD 5.1		2010-11-19 [NBD]
    558 FreeBSD 7.4		2011-02-24 [FBD]
    559 FreeBSD 8.2		2011-02-24 [FBD]
    560 DragonFly 2.10.1	2011-04-26 [DFB]
    561 OpenBSD 4.9		2011-05-01 [OBD]
    562 Mac OS X 10.7		2011-07-20 [APL]
    563 OpenBSD 5.0		2011-11-01 [OBD]
    564 FreeBSD 9.0		2012-01-12 [FBD]
    565 NetBSD 5.1.2		2012-02-02 [NBD] (security/critical release)
    566 DragonFly 3.0.1		2012-02-21 [DFB]
    567 FreeBSD 8.3		2012-04-18 [FBD]
    568 OpenBSD 5.1		2012-05-01 [OBD]
    569 Mac OS X 10.8		2012-07-25 [APL]
    570 NetBSD 6.0		2012-10-17 [NBD]
    571 OpenBSD 5.2		2012-11-01 [OBD]
    572 DragonFly 3.2.1		2012-11-02 [DFB]
    573 NetBSD 5.2		2012-12-03 [NBD]
    574 NetBSD 6.0.1		2012-12-26 [NBD] (security/critical release)
    575 FreeBSD 9.1		2012-12-30 [FBD]
    576 DragonFly 3.4.1		2013-04-29 [DFB]
    577 OpenBSD 5.3		2013-05-01 [OBD]
    578 NetBSD 6.0.2		2013-05-18 [NBD] (security/critical release)
    579 NetBSD 6.1		2013-05-18 [NBD]
    580 
    581 Bibliography
    582 ------------------------
    583 
    584 Leffler, Samuel J., Marshall Kirk McKusick, Michael J Karels and John
    585 Quarterman. The Design and Implementation of the 4.3BSD UNIX Operating
    586 System. Reading, Mass. Addison-Wesley, 1989. ISBN 0-201-06196-1
    587 
    588 Salus, Peter H. A quarter century of UNIX. Addison-Wesley Publishing
    589 Company, Inc., 1994. ISBN 0-201-54777-5
    590 
    591 McKusick, Marshall Kirk, Keith Bostic, Michael J Karels, and John
    592 Quarterman. The Design and Implementation of the 4.4BSD Operating
    593 System. Reading, Mass. Addison-Wesley, 1996. ISBN 0-201-54979-4
    594 
    595 McKusick, Marshall Kirk, George Neville-Neil. The Design and
    596 Implementation of the FreeBSD Operating System.
    597 Addison-Wesley Professional, Published: Aug 2, 2004. ISBN 0-201-70245-2
    598 
    599 Doug McIlroy. Research Unix Reader.
    600 
    601 Michael G. Brown. The Role of BSD in the Development of Unix.
    602 Presented to the Tasmanian Unix Special Interest Group of the
    603 Australian Computer Society, Hobart, August 1993.
    604 
    605 Peter H. Salus. Unix at 25. Byte Magazine, October 1994.
    606 URL: http://www.byte.com/art/9410/sec8/art3.htm
    607 
    608 Andreas Klemm, Lars Kller. If you're going to San Francisco ...
    609 Die freien BSD-Varianten von Unix. c't April 1997, page 368ff.
    610 
    611 BSD Release Announcements collection.
    612 URL: http://www.FreeBSD.org/releases/
    613 
    614 BSD Hypertext Man Pages
    615 URL: http://www.FreeBSD.org/cgi/man.cgi
    616 
    617 UNIX history graphing project
    618 URL: http://minnie.tuhs.org/Unix_History/index.html
    619 
    620 UNIX history
    621 URL: http://www.levenez.com/unix/
    622 
    623 James Howard: The BSD Family Tree
    624 URL: http://ezine.daemonnews.org/200104/bsd_family.html
    625 ("what are the differences between FreeBSD, NetBSD, and OpenBSD?")
    626 
    627 
    628 Acknowledgments
    629 ---------------
    630 
    631 Josh Gilliam for suggestions, bug fixes, and finding very old
    632 original BSD announcements from Usenet or tapes.
    633 
    634 Steven M. Schultz for providing 2.8BSD, 2.10BSD, 2.11BSD manual pages.
    635 
    636 --
    637 Copyright (c) 1997-2012 Wolfram Schneider <wosch (a] FreeBSD.ORG>
    638 URL: http://cvsweb.freebsd.org/src/share/misc/bsd-family-tree
    639 
    640 $FreeBSD$
    641