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bsd-family-tree revision 1.63
      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  |     FreeBSD 2.2.8 | |     |    |            |             |
    114  |         |         | |     |    |            |             |
    115  |         v         | |     |    |        OpenBSD 2.4       |
    116  |     FreeBSD 2.2.9 | |     |    |            |             |
    117  |                   | |     |    |            |             |
    118 FreeBSD 3.0 <--------* |     |    v            |             |
    119  |                     |     | NetBSD 1.3.3    |             |
    120  *---FreeBSD 3.1       |     |                 |             |
    121  |       |             |     |                 |           BSD/OS 4.0.1
    122  |   FreeBSD 3.2----*  |  NetBSD 1.4       OpenBSD 2.5       |
    123  |       |          |  |  |  |    |            |             |
    124  |       |          |  |  |  |    |            |             |
    125  |       |          |  |  |  |    |            |             |
    126  |   FreeBSD 3.3    |  |  |  | NetBSD 1.4.1    |             |
    127  |       |          |  |  |  |    |        OpenBSD 2.6       |
    128  |   FreeBSD 3.4    |  |  |  |    |            |             |
    129  |           |      |  |  |  |    |            |           BSD/OS 4.1
    130 FreeBSD 4.0  |      |  |  |  | NetBSD 1.4.2    |             |
    131  |           |      |  |  |  |    |            |             |
    132  |           |      |  |  |  |    |            |             |
    133  |   FreeBSD 3.5    |  |  |  |    |        OpenBSD 2.7       |
    134  |           |      |  |  |  |    |            |             |
    135  |   FreeBSD 3.5.1  |  |  |  |    |            |             |
    136  |                  |  |  |  |    |            |             |
    137  *---FreeBSD 4.1    |  |  |  |    |            |             |
    138  |      |           |  | (?) |    |            |             |
    139  |   FreeBSD 4.1.1  |  |  /  |    |            |             |
    140  |      |           |  | /   |    |            |             |
    141  |   FreeBSD 4.2   Darwin/   | NetBSD 1.4.3    |             |
    142  |      |         Mac OS X   |             OpenBSD 2.8     BSD/OS 4.2
    143  |      |             |      |                 |             |
    144  |      |             |      |                 |             |
    145  |      |           10.0  NetBSD 1.5           |             |
    146  |   FreeBSD 4.3      |      |    |            |             |
    147  |      |             |      |    |        OpenBSD 2.9       |
    148  |      |             |      | NetBSD 1.5.1    |             |
    149  |      |             |      |    |            |             |
    150  |   FreeBSD 4.4-.    |      | NetBSD 1.5.2    |             |
    151  |      |        | Mac OS X  |    |            |             |
    152  |      |        |   10.1    |    |        OpenBSD 3.0       |
    153  |   FreeBSD 4.5 |    |      |    |            |             |
    154  |      |         \   |      |    |            |           BSD/OS 4.3
    155  |   FreeBSD 4.6   \  |      |    |        OpenBSD 3.1       |
    156  |      |           \ |      | NetBSD 1.5.3    |             |
    157  |   FreeBSD 4.6.2 Mac OS X  |                 |             |
    158  |      |            10.2    |                 |             |
    159  |   FreeBSD 4.7      |      |                 |             |
    160  |      |             |   NetBSD 1.6       OpenBSD 3.2       |
    161  |   FreeBSD 4.8      |      |    |            |             |
    162  |      |             |      | NetBSD 1.6.1    |             |
    163  |      |--------.    |      |    |        OpenBSD 3.3     BSD/OS 5.0
    164  |      |         \   |      |    |            |             |
    165  |   FreeBSD 4.9   |  |      |    |        OpenBSD 3.4     BSD/OS 5.1 ISE
    166  |      |          |  |      |    |            |
    167  |      |          |  |      | NetBSD 1.6.2    |
    168  |      |          |  |      |    |            |
    169  |      |          |  |      |    |        OpenBSD 3.5
    170  |      |          |  |      |    v            |
    171  |   FreeBSD 4.10  |  |      |                 |
    172  |      |          |  |      |                 |
    173  |   FreeBSD 4.11  |  |      |                 |
    174  |                 |  |      |                 |
    175  |                  `-|------|-----------------|---------------------.
    176  |                    |      |                 |                      \
    177 FreeBSD 5.0           |      |                 |                       |
    178  |                    |      |                 |                       |
    179 FreeBSD 5.1           |      |                 |                DragonFly 1.0
    180  |          \         |      |                 |                       |
    181  |           ----- Mac OS X  |                 |                       |
    182  |                   10.3    |                 |                       |
    183 FreeBSD 5.2           |      |                 |                       |
    184  |      |             |      |                 |                       |
    185  |   FreeBSD 5.2.1    |      |                 |                       |
    186  |                    |      |                 |                       |
    187  *-------FreeBSD 5.3  |      |                 |                       |
    188  |           |        |      |             OpenBSD 3.6                 |
    189  |           |        |   NetBSD 2.0           |                       |
    190  |           |        |      | |  |            |               DragonFly 1.2.0
    191  |           |     Mac OS X  | | NetBSD 2.0.2  |                       |
    192  |           |       10.4    | |  |            |                       |
    193  |       FreeBSD 5.4  |      | |  |            |                       |
    194  |           |        |      | |  |        OpenBSD 3.7                 |
    195  |           |        |      | | NetBSD 2.0.3  |                       |
    196  |           |        |      | |  |            |                       |
    197  *--FreeBSD  |        |      | |  v        OpenBSD 3.8                 |
    198  |    6.0    |        |      | |               |                       |
    199  |     |     |        |      |  \              |                       |
    200  |     |     |        |      | NetBSD 2.1      |                       |
    201  |     |     |        |      |                 |                       |
    202  |     |     |        |   NetBSD 3.0           |                       |
    203  |     |     |        |      | |  |            |               DragonFly 1.4.0
    204  |     |     |        |      | |  |        OpenBSD 3.9                 |
    205  |  FreeBSD  |        |      | |  |            |                       |
    206  |    6.1    |        |      | |  |            |                       |
    207  |     |  FreeBSD 5.5 |      | |  |            |                       |
    208  |     |              |      | | NetBSD 3.0.1  |               DragonFly 1.6.0
    209  |     |              |      | |  |            |                       |
    210  |     |              |      | |  |        OpenBSD 4.0                 |
    211  |     |              |      | | NetBSD 3.0.2  |                       |
    212  |     |              |      | NetBSD 3.1      |                       |
    213  | FreeBSD 6.2        |      |                 |                       |
    214  |     |              |      |                 |               DragonFly 1.8.0
    215  |     |              |      |             OpenBSD 4.1                 |
    216  |     |              |      |                 |               DragonFly 1.10.0
    217  |     |           Mac OS X  |                 |                       |
    218  |     |             10.5    |                 |                       |
    219  |     |              |      |             OpenBSD 4.2                 |
    220  |     |              |   NetBSD 4.0           |                       |
    221  | FreeBSD 6.3        |      |    |            |                       |
    222  |            \       |      |    |            |                       |
    223  *--FreeBSD    |      |      |    |            |               DragonFly 1.12.0
    224  |    7.0      |      |      |    |            |                       |
    225  |     |       |      |      |    |        OpenBSD 4.3                 |
    226  |     |       |      |      | NetBSD          |               DragonFly 2.0.0
    227  |     |    FreeBSD   |      |  4.0.1      OpenBSD 4.4                 |
    228  |     |      6.4     |      |                 |                       |
    229  |     |              |      |                 |                       |
    230  |  FreeBSD 7.1       |      |                 |                       |
    231  |     |              |      |                 |               DragonFly 2.2.0
    232  |  FreeBSD 7.2       |   NetBSD 5.0       OpenBSD 4.5                 |
    233  |             \      |      | |    \          |                       |
    234  |              |  Mac OS X  | |     \         |                       |
    235  |              |    10.6    | |      \        |                       |
    236  |              |     |      | |   NetBSD      |               DragonFly 2.4.0
    237  |              |     |      | |    5.0.1  OpenBSD 4.6                 |
    238  |              |     |      | |       |       |                       |
    239  *--FreeBSD     |     |      | |       |       |                       |
    240  |    8.0       |     |      | |       |       |                       |
    241  |     |     FreeBSD  |      | |   NetBSD      |                       |
    242  |     |       7.3    |      | |    5.0.2      |               DragonFly 2.6.0
    243  |     |        |     |      | |           OpenBSD 4.7                 |
    244  |  FreeBSD     |     |      | |               |                       |
    245  |    8.1       |     |      | |               |                       |
    246  |     |        |     |      | |               |               DragonFly 2.8.2
    247  |     |        |     |      | |           OpenBSD 4.8                 |
    248  |     |        |     |      | *--NetBSD       |                       |
    249  |  FreeBSD  FreeBSD  |      | |    5.1        |                       |
    250  |    8.2      7.4    |      | |      |        |               DragonFly 2.10.1
    251  |     |              |      | |      |    OpenBSD 4.9                 |
    252  |     `-----.     Mac OS X  | |      |        |                       |
    253  |            \      10.7    | |      |        |                       |
    254  |             |      |      | |      |    OpenBSD 5.0                 |
    255  *--FreeBSD    |      |      | |      |        |                       |
    256  |    9.0      |      |      | |   NetBSD      |               DragonFly 3.0.1
    257  |     |    FreeBSD   |      | |    5.1.2      |                       |
    258  |     |      8.3     |      | |      |        |                       |
    259  |     |       |      |      | |   NetBSD      |                       |
    260  |     |       |      |      | |    5.1.3      |                       |
    261  |     |       |      |      | |      |        |                       |
    262  |     |       |      |      | |   NetBSD      |                       |
    263  |     |       |      |      | |    5.1.4      |                       |
    264  |     |       |      |      | |           OpenBSD 5.1                 |
    265  |     |       |   Mac OS X  | `----.          |                       |
    266  |     |       |     10.8    |       \         |                       |
    267  |     |       |      |   NetBSD 6.0  |        |                       |
    268  |     |       |      |      | | |    |    OpenBSD 5.2         DragonFly 3.2.1
    269  |  FreeBSD    |      |      | | | NetBSD      |                       |
    270  |    9.1      |      |      | | |   5.2       |                       |
    271  |     |       |      |      | | |    |        |                       |
    272  |     |       |      |      | | | NetBSD      |                       |
    273  |     |       |      |      | | |  5.2.1      |                       |
    274  |     |       |      |      | | |    |        |                       |
    275  |     |       |      |      | | | NetBSD      |                       |
    276  |     |       |      |      | | |  5.2.2      |                       |
    277  |     |       |      |      | | |             |                       |
    278  |     |       |      |      | |  \            |                       |
    279  |     |       |      |      | |   NetBSD      |                       |
    280  |     |       |      |      | |    6.0.1      |                       |
    281  |     |       |      |      | |      |   OpenBSD 5.3          DragonFly 3.4.1
    282  |     |       |      |      | |   NetBSD      |                       |
    283  |     |       |      |      | |    6.0.2      |                       |
    284  |     |       |      |      | |      |        |                       |
    285  |     |       |      |      | |   NetBSD      |                       |
    286  |     |       |      |      | |    6.0.3      |                       |
    287  |     |       |      |      | |      |        |                       |
    288  |     |       |      |      | |   NetBSD      |                       |
    289  |     |       |      |      | |    6.0.4      |                       |
    290  |     |       |      |      | |      |        |                       |
    291  |     |       |      |      | |   NetBSD      |                       |
    292  |     |       |      |      | |    6.0.5      |                       |
    293  |     |       |      |      | |               |                       |
    294  |     |       |      |      | |`-NetBSD 6.1   |                       |
    295  |     |    FreeBSD   |      |       |         |                       |
    296  |     |      8.4     |      |    NetBSD 6.1.1 |                       |
    297  |     |              |      |       |         |                       |
    298  |  FreeBSD           |      |    NetBSD 6.1.2 |                       |
    299  |    9.2          Mac OS X  |       |         |                       |
    300  |     |             10.9    |       |    OpenBSD 5.4                  |
    301  |     `-----.        |      |       |         |               DragonFly 3.6.0
    302  |            \       |      |       |         |                       |
    303  *--FreeBSD    |      |      |    NetBSD 6.1.3 |                       |
    304  |   10.0      |      |      |       |         |                       |
    305  |     |       |      |      |       |         |               DragonFly 3.6.1
    306  |     |       |      |      |       |         |                       |
    307  |     |       |      |      |       |         |                       |
    308  |     |       |      |      |       |         |               DragonFly 3.6.2
    309  |     |       |      |      |    NetBSD 6.1.4 |                       |
    310  |     |       |      |      |       |         |                       |
    311  |     |       |      |      |       |    OpenBSD 5.5                  |
    312  |     |       |      |      |       |         |                       |
    313  |     |       |      |      |       |         |               DragonFly 3.8.0
    314  |     |       |      |      |       |         |                       |
    315  |     |       |      |      |       |         |                       |
    316  |     |       |      |      |       |         |               DragonFly 3.8.1
    317  |     |       |      |      |       |         |                       |
    318  |     |       |      |      |       |         |                       |
    319  |     |       |      |      |       |         |               DragonFly 3.6.3
    320  |     |       |      |      |       |         |                       |
    321  |     |    FreeBSD   |      |       |         |                       |
    322  |     |      9.3     |      |       |         |                       |
    323  |     |              |      |    NetBSD 6.1.5 |               DragonFly 3.8.2
    324  |     |           Mac OS X  |                 |                       |
    325  |     |             10.10   |                 |                       |
    326  |     |              |      |            OpenBSD 5.6                  |
    327  |  FreeBSD           |      |                 |                       |
    328  |   10.1             |      |                 |               DragonFly 4.0.1
    329  |     |              |      |                 |                       |
    330  |     |              |      |                 |               DragonFly 4.0.2
    331  |     |              |      |                 |                       |
    332  |     |              |      |                 |               DragonFly 4.0.3
    333  |     |              |      |                 |                       |
    334  |     |              |      |                 |               DragonFly 4.0.4
    335  |     |              |      |                 |                       |
    336  |     |              |      |                 |               DragonFly 4.0.5
    337  |     |              |      |                 |                       |
    338  |     |              |      |            OpenBSD 5.7                  |
    339  |     |              |      |                 |               DragonFly 4.2.0
    340  |  FreeBSD           |      |                 |                       |
    341  |   10.2             |      |                 |                       |
    342  |     |            macOS  NetBSD 7.0          |                       |
    343  |     |            10.11   | | |         OpenBSD 5.8                  |
    344  |     |              |     | | `--.           |               DragonFly 4.4.1
    345  |  FreeBSD           |     | |    |      OpenBSD 5.9                  |
    346  |   10.3             |     | |    |           |                       |
    347  |     |              |     | | NetBSD 7.0.1   |                       |
    348  |     `------.       |     | |    |           |               DragonFly 4.6.0
    349  |            |       |     | |    |           |                       |
    350  |            |       |     | |    |           |                       |
    351  *--FreeBSD   |     macOS   | |    |      OpenBSD 6.0                  |
    352  |   11.0     |     10.12   | | NetBSD 7.0.2   |                       |
    353  |     |      |       |     | |                |                       |
    354  |     |      |       |     | *- NetBSD 7.1    |                       |
    355  |     |      |     macOS   |                  |               DragonFly 4.8.0
    356  |     |      |     10.13   |             OpenBSD 6.1                  |
    357  |  FreeBSD   |       |     |                  |                       |
    358  |   11.1  FreeBSD    |     |                  |                       |
    359  |     |    10.4      |     |             OpenBSD 6.2                  |
    360  |     |              |     |                  |                       |
    361  |     v              |     |                  |               DragonFly 5.0.0
    362  |                    |     |                  |                       |
    363  |                    |     |                  |               DragonFly 5.0.1
    364  |                    |     |                  |                       |
    365  |                    |     |                  |               DragonFly 5.0.2
    366  |                    |     |                  |                       |
    367 FreeBSD 12 -current   | NetBSD -current   OpenBSD -current    DragonFly -current
    368  |                    |     |                  |                       |
    369  v                    v     v                  v                       v
    370 
    371 Time
    372 ----------------
    373 
    374 Time tolerance +/- 6 months, depending on which book/article you read; if it
    375 was the announcement in Usenet or if it was available as tape.
    376 
    377 [44B] McKusick, Marshall Kirk, Keith Bostic, Michael J Karels,
    378 	and John Quarterman. The Design and Implementation of
    379 	the 4.4BSD Operating System.
    380 [APL] Apple website [https://www.apple.com/macosx/]
    381 [BSDI] Berkeley Software Design, Inc.
    382 [DFB] DragonFlyBSD Project, The.
    383 [DOC] README, COPYRIGHT on tape.
    384 [FBD] FreeBSD Project, The.
    385 [KB]  Keith Bostic. BSD2.10 available from Usenix. comp.unix.sources,
    386 	Volume 11, Info 4, April, 1987.
    387 [KKK] Mike Karels, Kirk McKusick, and Keith Bostic. tahoe announcement.
    388 	comp.bugs.4bsd.ucb-fixes, June 15, 1988.
    389 [KSJ] Michael J. Karels, Carl F. Smith, and William F. Jolitz.
    390 	Changes in the Kernel in 2.9BSD. Second Berkeley Software
    391 	Distribution UNIX Version 2.9, July, 1983.
    392 [NBD] NetBSD Project, The.
    393 [OBD] OpenBSD Project, The.
    394 [QCU] Salus, Peter H. A quarter century of UNIX.
    395 [SMS] Steven M. Schultz. 2.11BSD, UNIX for the PDP-11.
    396 [TUHS] The Unix Historical Society.  http://minnie.tuhs.org/Unix_History/.
    397 [USE] Usenet announcement.
    398 [WRS] Wind River Systems, Inc.
    399 [dmr] Dennis Ritchie, via E-Mail
    400 
    401 Multics                 1965
    402 UNIX                    Summer 1969
    403 				DEC PDP-7
    404 First   Edition         1971-11-03 [QCU]
    405 				DEC PDP-11/20, Assembler
    406 Second  Edition         1972-06-12 [QCU]
    407 				10 UNIX installations
    408 Third   Edition         1973-02-xx [QCU]
    409 				Pipes, 16 installations
    410 Fourth  Edition         1973-11-xx [QCU]
    411 				rewriting in C effected,
    412                                 above 30 installations
    413 Fifth   Edition         1974-06-xx [QCU]
    414 				above 50 installations
    415 Sixth   Edition         1975-05-xx [QCU]
    416 				port to DEC Vax
    417 Seventh Edition         1979-01-xx [QCU] 1979-01-10 [TUHS]
    418 				first portable UNIX
    419 Eighth  Edition         1985-02-xx [QCU]
    420 				VAX 11/750, VAX 11/780 [dmr]
    421 				descended from 4.1c BSD [dmr]
    422 				descended from 4.1 BSD [44B]
    423 			scooping-out and replacement of the character-device
    424 			and networking part by the streams mechanism
    425 
    426 Ninth   Edition         1986-09-xx [QCU]
    427 Tenth   Edition         1989-10-xx [QCU]
    428 
    429 1BSD                    late 1977
    430 			1978-03-09 [QCU]
    431 				PDP-11, Pascal, ex(1)
    432 				30 free copies of 1BSD sent out
    433 				35 tapes sold for 50 USD [QCU]
    434 2BSD                    mid 1978 [QCU] 1979-05-10 [TUHS]
    435 				75 2BSD tapes shipped
    436 2.79BSD			1980-04-xx [TUHS]
    437 2.8BSD			1981-07-xx [KSJ]
    438 
    439 2.8.1BSD		1982-01-xx [QCU]
    440 				set of performance improvements
    441 2.9BSD			1983-07-xx [KSJ]
    442 2.9.1BSD                1983-11-xx [TUHS]
    443 2.9BSD-Seismo		1985-08-xx [SMS]
    444 2.10BSD			1987-04-xx [KKK]
    445 2.10.1BSD		1989-01-xx [SMS]
    446 2.11BSD			1992-02-xx [SMS]
    447 2.11BSD rev #430	1999-12-13 [SMS]
    448 
    449 32V			1978-1[01]-xx [QCU] 1979-03-26 [TUHS]
    450 3BSD                    late 1979 [QCU] March 1980 [TUHS]
    451 				virtual memory, page replacement,
    452                         	demand paging
    453 4.0BSD                  1980-10-xx
    454 4.1BSD                  1981-07-08 [DOC]
    455 4.1aBSD                 1982-04-xx
    456 				alpha release, 100 sites, networking [44B]
    457 4.1bBSD				internal release, fast filesystem [44B]
    458 4.1cBSD                 late 1982
    459 				beta release, IPC [44B]
    460 4.2BSD                  1983-09-xx [QCU]
    461                         1983-08-03 [DOC]
    462 4.3BSD                  1986-06-xx [QCU]
    463 			1986-04-05 [KB], [DOC]
    464 4.3BSD Tahoe            1988-06-15 [QCU], [DOC]
    465 4.3BSD NET/1            1988-11-xx [QCU]
    466                         1989-01-01 [DOC]
    467 4.3BSD Reno             1990-06-29 [QCU], [DOC]
    468 4.3BSD NET/2            1991-06-28 [QCU], [DOC]
    469 
    470 BSD/386 ALPHA		1991-12-xx [BSDI]
    471 				first code released to people outside BSDI
    472 386BSD 0.0              1992-02-xx [DOC]
    473 BSD/386 0.3.1	        1992-04-xx [BSDI] first ext. beta; B customers
    474 BSD/386 0.3.3		1992-06-xx [BSDI] first CDROM version
    475 386BSD 0.1              1992-07-28 [DOC]
    476 4.4BSD Alpha            1992-07-07
    477 BSD/386 0.9.3		1992-10-xx [BSDI]
    478 				first external gamma; G customers
    479 BSD/386 0.9.4		1992-12-xx [BSDI]
    480 				would have been 1.0 except for request
    481 				for preliminary injunction
    482 BSD/386 1.0 		1993-03-xx [BSDI]
    483 				injunction denied; first official release
    484 NetBSD 0.8              1993-04-20 [NBD]
    485 4.4BSD                  1993-06-01 [USE]
    486 NetBSD 0.9              1993-08-23 [NBD]
    487 FreeBSD 1.0		1993-11-01 [FBD]
    488 FreeBSD 1.0.2		1993-11-14 [FBD]
    489 				supersedes 1.0 13 days after release.
    490 BSD/386 1.1		1994-02-xx [BSDI]
    491 4.4BSD Lite             1994-03-01 [USE]
    492 FreeBSD 1.1		1994-05-07 [FBD]
    493 FreeBSD 1.1.5		1994-06-30 [FBD]
    494 FreeBSD 1.1.5.1		1994-07-05 [FBD]
    495 				supersedes 1.1.5 5 days after release.
    496 NetBSD 1.0              1994-10-26 [NBD]
    497 386BSD 1.0              1994-11-12 [USE]
    498 FreeBSD 2.0		1994-11-23 [FBD]
    499 BSD/OS 2.0		1995-01-xx [BSDI] 4.4 lite based
    500 FreeBSD 2.0.5		1995-06-10 [FBD]
    501 BSD/OS 2.0.1		1995-06-xx [BSDI]
    502 4.4BSD Lite Release 2	1995-06-xx [44B]
    503 				the true final distribution from the CSRG
    504 FreeBSD 2.1.0		1995-11-19 [FBD]
    505 NetBSD 1.1              1995-11-26 [NBD]
    506 BSD/OS 2.1		1996-01-xx [BSDI]
    507 FreeBSD 2.1.5		1996-07-14 [FBD]
    508 NetBSD 1.2              1996-10-04 [NBD]
    509 OpenBSD 2.0             1996-10-18 [OBD]
    510 FreeBSD 2.1.6		1996-11-16 [FBD]
    511 FreeBSD 2.1.6.1		1996-11-25 [FBD] (sendmail security release)
    512 Rhapsody		1997-xx-xx
    513 FreeBSD 2.1.7		1997-02-20 [FBD]
    514 BSD/OS 3.0		1997-02-xx [BSDI] 4.4 lite2 based
    515 FreeBSD 2.2.0		1997-03-16 [FBD]
    516 FreeBSD 2.2.1		1997-03-25 [FBD]
    517 FreeBSD 2.2.2		1997-05-16 [FBD]
    518 NetBSD 1.2.1            1997-05-20 [NBD] (patch release)
    519 OpenBSD 2.1             1997-06-01 [OBD]
    520 FreeBSD 2.2.5		1997-10-22 [FBD]
    521 OpenBSD 2.2             1997-12-01 [OBD]
    522 NetBSD 1.3              1998-01-04 [NBD]
    523 FreeBSD 2.2.6		1998-03-25 [FBD]
    524 NetBSD 1.3.1            1998-03-09 [NBD] (patch release)
    525 BSD/OS 3.1		1998-03-xx [BSDI]
    526 OpenBSD 2.3             1998-05-19 [OBD]
    527 NetBSD 1.3.2            1998-05-29 [NBD] (patch release)
    528 FreeBSD 2.2.7		1998-07-22 [FBD]
    529 BSD/OS 4.0		1998-08-xx [BSDI]
    530 				2-lock MP support, ELF executables
    531 FreeBSD 3.0		1998-10-16 [FBD]
    532 				FreeBSD-3.0 is a snapshot from -current,
    533 				while 3.1 and 3.2 are from 3.x-stable which
    534 				was branched quite some time after 3.0-release
    535 FreeBSD 2.2.8           1998-11-29 [FBD]
    536 OpenBSD 2.4             1998-12-01 [OBD]
    537 NetBSD 1.3.3            1998-12-23 [NBD] (patch release)
    538 FreeBSD 3.1		1999-02-15 [FBD]
    539 BSD/OS 4.0.1		1999-03-xx [BSDI]
    540 NetBSD 1.4              1999-05-12 [NBD]
    541 FreeBSD 3.2             1999-05-17 [FBD]
    542 OpenBSD 2.5             1999-05-19 [OBD]
    543 NetBSD 1.4.1            1999-08-26 [NBD] (patch release)
    544 FreeBSD 3.3             1999-09-17 [FBD]
    545 OpenBSD 2.6             1999-12-01 [OBD]
    546 FreeBSD 3.4             1999-12-20 [FBD]
    547 BSD/OS 4.1		1999-12-xx [BSDI]
    548 FreeBSD 4.0             2000-03-13 [FBD]
    549 NetBSD 1.4.2            2000-03-19 [NBD] (patch release)
    550 OpenBSD 2.7             2000-06-15 [OBD]
    551 FreeBSD 3.5		2000-06-24 [FBD]
    552 FreeBSD 4.1		2000-07-27 [FBD]
    553 FreeBSD 3.5.1		2000-07-28 [FBD]
    554 FreeBSD 4.1.1		2000-09-25 [FBD] (a network-only patch release)
    555 FreeBSD 4.2  		2000-11-21 [FBD]
    556 NetBSD 1.4.3		2000-11-25 [NBD] (patch release)
    557 BSD/OS 4.2		2000-11-29 [BSDI]
    558 OpenBSD 2.8		2000-12-01 [OBD]
    559 NetBSD 1.5              2000-12-06 [NBD]
    560 Mac OS X 10.0           2001-03-24 [APL]
    561 FreeBSD 4.3  		2001-04-20 [FBD]
    562 OpenBSD 2.9  		2001-06-01 [OBD]
    563 NetBSD 1.5.1		2001-07-11 [NBD] (patch release)
    564 NetBSD 1.5.2		2001-09-13 [NBD] (patch release)
    565 FreeBSD 4.4  		2001-09-18 [FBD]
    566 Mac OS X 10.1		2001-09-29 [APL]
    567 OpenBSD 3.0		2001-12-01 [OBD]
    568 FreeBSD 4.5  		2002-01-29 [FBD]
    569 BSD/OS 4.3		2002-03-14 [WRS]
    570 OpenBSD 3.1		2002-05-19 [OBD]
    571 FreeBSD 4.6  		2002-06-15 [FBD]
    572 NetBSD 1.5.3		2002-07-22 [NBD] (patch release)
    573 FreeBSD 4.6.2		2002-08-15 [FBD] (patch release)
    574 Mac OS X 10.2		2002-08-23 [APL]
    575 NetBSD 1.6		2002-09-14 [NBD]
    576 FreeBSD 4.7		2002-10-08 [FBD]
    577 OpenBSD 3.2		2002-11-01 [OBD]
    578 FreeBSD 5.0		2003-01-17 [FBD]
    579 				FreeBSD 5.0 is a separate branch off of
    580 				-current, similar to 3.0.
    581 FreeBSD 4.8		2003-04-03 [FBD]
    582 NetBSD 1.6.1		2003-04-21 [NBD] (patch release)
    583 OpenBSD 3.3		2003-05-01 [OBD]
    584 BSD/OS 5.0		2003-05-?? [WRS]
    585 FreeBSD 5.1		2003-06-09 [FBD]
    586 Mac OS X 10.3		2003-10-24 [APL]
    587 FreeBSD 4.9		2003-10-28 [FBD]
    588 BSD/OS 5.1 ISE		2003-10-?? [WRS] (final version)
    589 OpenBSD 3.4		2003-11-01 [OBD]
    590 FreeBSD 5.2		2004-01-12 [FBD]
    591 FreeBSD 5.2.1		2004-02-22 [FBD] (patch release)
    592 NetBSD 1.6.2		2004-03-01 [NBD] (patch release)
    593 OpenBSD 3.5		2004-04-01 [OBD]
    594 FreeBSD 4.10		2004-05-27 [FBD]
    595 DragonFly 1.0		2004-07-12 [DFB]
    596 OpenBSD 3.6		2004-10-29 [OBD]
    597 FreeBSD 5.3		2004-11-06 [FBD]
    598 NetBSD 2.0		2004-12-09 [NBD]
    599 FreeBSD 4.11		2005-01-25 [FBD]
    600 DragonFly 1.2.0		2005-04-08 [DFB]
    601 NetBSD 2.0.2		2005-04-14 [NBD] (security/critical release)
    602 Mac OS X 10.4		2005-04-29 [APL]
    603 FreeBSD 5.4		2005-05-09 [FBD]
    604 OpenBSD 3.7		2005-05-19 [OBD]
    605 NetBSD 2.0.3		2005-10-31 [NBD] (security/critical release)
    606 OpenBSD 3.8		2005-11-01 [OBD]
    607 FreeBSD 6.0		2005-11-01 [FBD]
    608 NetBSD 2.1		2005-11-02 [NBD]
    609 NetBSD 3.0		2005-12-23 [NBD]
    610 DragonFly 1.4.0		2006-01-08 [DFB]
    611 FreeBSD 2.2.9		2006-04-01 [FBD]
    612 OpenBSD 3.9		2006-05-01 [OBD]
    613 FreeBSD 6.1		2006-05-08 [FBD]
    614 FreeBSD 5.5		2006-05-25 [FBD]
    615 NetBSD 3.0.1		2006-07-24 [NBD] (security/critical release)
    616 DragonFly 1.6.0		2006-07-24 [DFB]
    617 OpenBSD 4.0		2006-11-01 [OBD]
    618 NetBSD 3.0.2		2006-11-04 [NBD] (security/critical release)
    619 NetBSD 3.1		2006-11-04 [NBD]
    620 FreeBSD 6.2		2007-01-15 [FBD]
    621 DragonFly 1.8.0		2007-01-30 [DFB]
    622 OpenBSD 4.1		2007-05-01 [OBD]
    623 DragonFly 1.10.0	2007-08-06 [DFB]
    624 Mac OS X 10.5		2007-10-26 [APL]
    625 OpenBSD 4.2		2007-11-01 [OBD]
    626 NetBSD 4.0		2007-12-19 [NBD]
    627 FreeBSD 6.3		2008-01-18 [FBD]
    628 DragonFly 1.12.0	2008-02-26 [DFB]
    629 FreeBSD 7.0		2008-02-27 [FBD]
    630 OpenBSD 4.3		2008-05-01 [OBD]
    631 DragonFly 2.0.0		2008-07-21 [DFB]
    632 OpenBSD 4.4		2008-11-01 [OBD]
    633 FreeBSD 6.4		2008-11-28 [FBD]
    634 FreeBSD 7.1		2009-01-04 [FBD]
    635 DragonFly 2.2.0		2009-02-17 [DFB]
    636 NetBSD 5.0		2009-04-29 [NBD]
    637 OpenBSD 4.5		2009-05-01 [OBD]
    638 FreeBSD 7.2		2009-05-04 [FBD]
    639 Mac OS X 10.6		2009-06-08 [APL]
    640 NetBSD 5.0.1		2009-08-02 [NBD] (security/critical release)
    641 DragonFly 2.4.0		2009-09-16 [DFB]
    642 OpenBSD 4.6		2009-10-18 [OBD]
    643 FreeBSD 8.0		2009-11-26 [FBD]
    644 NetBSD 5.0.2		2010-02-12 [NBD] (security/critical release)
    645 FreeBSD 7.3		2010-03-23 [FBD]
    646 DragonFly 2.6.0		2010-03-28 [DFB]
    647 OpenBSD 4.7		2010-05-19 [OBD]
    648 FreeBSD 8.1		2010-07-24 [FBD]
    649 DragonFly 2.8.2		2010-10-30 [DFB]
    650 OpenBSD 4.8		2010-11-01 [OBD]
    651 NetBSD 5.1		2010-11-19 [NBD]
    652 FreeBSD 7.4		2011-02-24 [FBD]
    653 FreeBSD 8.2		2011-02-24 [FBD]
    654 DragonFly 2.10.1	2011-04-26 [DFB]
    655 OpenBSD 4.9		2011-05-01 [OBD]
    656 Mac OS X 10.7		2011-07-20 [APL]
    657 OpenBSD 5.0		2011-11-01 [OBD]
    658 FreeBSD 9.0		2012-01-12 [FBD]
    659 NetBSD 5.1.2		2012-02-02 [NBD] (security/critical release)
    660 DragonFly 3.0.1		2012-02-21 [DFB]
    661 FreeBSD 8.3		2012-04-18 [FBD]
    662 OpenBSD 5.1		2012-05-01 [OBD]
    663 Mac OS X 10.8		2012-07-25 [APL]
    664 NetBSD 6.0		2012-10-17 [NBD]
    665 OpenBSD 5.2		2012-11-01 [OBD]
    666 DragonFly 3.2.1		2012-11-02 [DFB]
    667 NetBSD 5.2		2012-12-03 [NBD]
    668 NetBSD 6.0.1		2012-12-26 [NBD] (security/critical release)
    669 FreeBSD 9.1		2012-12-30 [FBD]
    670 DragonFly 3.4.1		2013-04-29 [DFB]
    671 OpenBSD 5.3		2013-05-01 [OBD]
    672 NetBSD 6.0.2		2013-05-18 [NBD] (security/critical release)
    673 NetBSD 6.1		2013-05-18 [NBD]
    674 FreeBSD 8.4		2013-06-07 [FBD]
    675 NetBSD 6.1.1		2013-08-22 [NBD]
    676 NetBSD 5.1.3		2013-09-29 [NBD]
    677 NetBSD 5.2.1		2013-09-29 [NBD]
    678 FreeBSD 9.2		2013-09-30 [FBD]
    679 NetBSD 6.0.3		2013-09-30 [NBD]
    680 NetBSD 6.1.2		2013-09-30 [NBD]
    681 Mac OS X 10.9		2013-10-22 [APL]
    682 OpenBSD 5.4		2013-11-01 [OBD]
    683 DragonFly 3.6.0 	2013-11-25 [DFB]
    684 FreeBSD 10.0		2014-01-20 [FBD]
    685 NetBSD 5.1.4		2014-01-25 [NBD]
    686 NetBSD 5.2.2		2014-01-25 [NBD]
    687 NetBSD 6.0.4		2014-01-25 [NBD]
    688 NetBSD 6.1.3		2014-01-25 [NBD]
    689 DragonFly 3.6.1 	2014-02-22 [DFB]
    690 DragonFly 3.6.2		2014-04-10 [DFB]
    691 NetBSD 6.0.5		2014-04-12 [NDB]
    692 NetBSD 6.1.4		2014-04-12 [NDB]
    693 OpenBSD 5.5		2014-05-01 [OBD]
    694 DragonFly 3.8.0		2014-06-04 [DFB]
    695 DragonFly 3.8.1		2014-06-16 [DFB]
    696 DragonFly 3.6.3		2014-06-17 [DFB]
    697 FreeBSD 9.3		2014-07-05 [FBD]
    698 DragonFly 3.8.2		2014-08-08 [DFB]
    699 NetBSD 6.1.5		2014-09-22 [NBD]
    700 Mac OS X 10.10		2014-10-16 [APL]
    701 OpenBSD 5.6		2014-11-01 [OBD]
    702 FreeBSD 10.1		2014-11-14 [FBD]
    703 DragonFly 4.0.1		2014-11-25 [DFB]
    704 DragonFly 4.0.2		2015-01-07 [DFB]
    705 DragonFly 4.0.3		2015-01-21 [DFB]
    706 DragonFly 4.0.4		2015-03-09 [DFB]
    707 DragonFly 4.0.5		2015-03-23 [DFB]
    708 OpenBSD 5.7		2015-05-01 [OBD]
    709 DragonFly 4.2.0		2015-06-29 [DFB]
    710 FreeBSD 10.2            2015-08-13 [FBD]
    711 NetBSD 7.0		2015-09-25 [NBD]
    712 OS X 10.11		2015-09-30 [APL]
    713 OpenBSD 5.8		2015-10-18 [OBD]
    714 DragonFly 4.4.1		2015-12-07 [DFB]
    715 OpenBSD 5.9		2016-03-29 [OBD]
    716 FreeBSD 10.3		2016-04-04 [FBD]
    717 NetBSD 7.0.1		2016-05-22 [NBD]
    718 DragonFly 4.6.0		2016-08-02 [DFB]
    719 OpenBSD 6.0		2016-09-01 [OBD]
    720 macOS 10.12		2016-09-20 [APL]
    721 NetBSD 7.0.2		2016-10-21 [NBD]
    722 FreeBSD 11.0		2016-10-10 [FBD]
    723 NetBSD 7.1		2017-03-11 [NBD]
    724 DragonFly 4.8.0		2017-03-27 [DFB]
    725 OpenBSD 6.1		2017-04-11 [OBD]
    726 FreeBSD 11.1		2017-07-26 [FBD]
    727 macOS 10.13		2017-09-25 [APL]
    728 FreeBSD 10.4		2017-10-03 [FBD]
    729 OpenBSD 6.2		2017-10-09 [OBD]
    730 DragonFly 5.0.0		2017-10-16 [DFB]
    731 DragonFly 5.0.1		2017-11-06 [DFB]
    732 DragonFly 5.0.2		2017-12-04 [DFB]
    733 
    734 Bibliography
    735 ------------------------
    736 
    737 Leffler, Samuel J., Marshall Kirk McKusick, Michael J Karels and John
    738 Quarterman. The Design and Implementation of the 4.3BSD UNIX Operating
    739 System. Reading, Mass. Addison-Wesley, 1989. ISBN 0-201-06196-1
    740 
    741 Salus, Peter H. A quarter century of UNIX. Addison-Wesley Publishing
    742 Company, Inc., 1994. ISBN 0-201-54777-5
    743 
    744 McKusick, Marshall Kirk, Keith Bostic, Michael J Karels, and John
    745 Quarterman. The Design and Implementation of the 4.4BSD Operating
    746 System. Reading, Mass. Addison-Wesley, 1996. ISBN 0-201-54979-4
    747 
    748 McKusick, Marshall Kirk, George Neville-Neil. The Design and
    749 Implementation of the FreeBSD Operating System.
    750 Addison-Wesley Professional, Published: Aug 2, 2004. ISBN 0-201-70245-2
    751 
    752 McKusick, Marshall Kirk, George Neville-Neil, Robert Watson. The
    753 Design and Implementation of the FreeBSD Operating System, 2nd Edition.
    754 Pearson Education, Inc., 2014. ISBN 0-321-96897-2
    755 
    756 Doug McIlroy. Research Unix Reader.
    757 
    758 Michael G. Brown. The Role of BSD in the Development of Unix.
    759 Presented to the Tasmanian Unix Special Interest Group of the
    760 Australian Computer Society, Hobart, August 1993.
    761 
    762 Peter H. Salus. Unix at 25. Byte Magazine, October 1994.
    763 URL: http://www.byte.com/art/9410/sec8/art3.htm
    764 
    765 Andreas Klemm, Lars Kller. If you're going to San Francisco ...
    766 Die freien BSD-Varianten von Unix. c't April 1997, page 368ff.
    767 
    768 BSD Release Announcements collection.
    769 URL: https://www.FreeBSD.org/releases/
    770 
    771 BSD Hypertext Man Pages
    772 URL: https://www.FreeBSD.org/cgi/man.cgi
    773 
    774 UNIX history graphing project
    775 URL: http://minnie.tuhs.org/Unix_History/index.html
    776 
    777 UNIX history
    778 URL: http://www.levenez.com/unix/
    779 
    780 James Howard: The BSD Family Tree
    781 URL: http://ezine.daemonnews.org/200104/bsd_family.html
    782 ("what are the differences between FreeBSD, NetBSD, and OpenBSD?")
    783 
    784 
    785 Acknowledgments
    786 ---------------
    787 
    788 Josh Gilliam for suggestions, bug fixes, and finding very old
    789 original BSD announcements from Usenet or tapes.
    790 
    791 Steven M. Schultz for providing 2.8BSD, 2.10BSD, 2.11BSD manual pages.
    792 
    793 --
    794 Copyright (c) 1997-2012 Wolfram Schneider <wosch (a] FreeBSD.ORG>
    795 URL: http://svnweb.freebsd.org/base/head/share/misc/bsd-family-tree
    796 
    797 $FreeBSD: head/share/misc/bsd-family-tree 326724 2017-12-09 05:05:25Z imp $
    798 $NetBSD: bsd-family-tree,v 1.63 2017/12/15 04:10:49 riastradh Exp $
    799