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bsd-family-tree revision 1.64
      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   |       |     |                  |               DragonFly 5.0.0
    358  |   11.1  FreeBSD    |     |                  |                       |
    359  |     |    10.4      |     |             OpenBSD 6.2          DragonFly 5.0.1
    360  |     |              |     |                  |                       |
    361  |     |              |     |                  |               DragonFly 5.0.2
    362  |     |              |     |                  |                       |
    363  |     |              |     |                  |                       |
    364  |     v              |     |                  |                       |
    365  |                    |     |                  |                       |
    366 FreeBSD 12 -current   | NetBSD -current   OpenBSD -current    DragonFly -current
    367  |                    |     |                  |                       |
    368  v                    v     v                  v                       v
    369 
    370 Time
    371 ----------------
    372 
    373 Time tolerance +/- 6 months, depending on which book/article you read; if it
    374 was the announcement in Usenet or if it was available as tape.
    375 
    376 [44B] McKusick, Marshall Kirk, Keith Bostic, Michael J Karels,
    377 	and John Quarterman. The Design and Implementation of
    378 	the 4.4BSD Operating System.
    379 [APL] Apple website [https://www.apple.com/macosx/]
    380 [BSDI] Berkeley Software Design, Inc.
    381 [DFB] DragonFlyBSD Project, The.
    382 [DOC] README, COPYRIGHT on tape.
    383 [FBD] FreeBSD Project, The.
    384 [KB]  Keith Bostic. BSD2.10 available from Usenix. comp.unix.sources,
    385 	Volume 11, Info 4, April, 1987.
    386 [KKK] Mike Karels, Kirk McKusick, and Keith Bostic. tahoe announcement.
    387 	comp.bugs.4bsd.ucb-fixes, June 15, 1988.
    388 [KSJ] Michael J. Karels, Carl F. Smith, and William F. Jolitz.
    389 	Changes in the Kernel in 2.9BSD. Second Berkeley Software
    390 	Distribution UNIX Version 2.9, July, 1983.
    391 [NBD] NetBSD Project, The.
    392 [OBD] OpenBSD Project, The.
    393 [QCU] Salus, Peter H. A quarter century of UNIX.
    394 [SMS] Steven M. Schultz. 2.11BSD, UNIX for the PDP-11.
    395 [TUHS] The Unix Historical Society.  http://minnie.tuhs.org/Unix_History/.
    396 [USE] Usenet announcement.
    397 [WRS] Wind River Systems, Inc.
    398 [dmr] Dennis Ritchie, via E-Mail
    399 
    400 Multics                 1965
    401 UNIX                    Summer 1969
    402 				DEC PDP-7
    403 First   Edition         1971-11-03 [QCU]
    404 				DEC PDP-11/20, Assembler
    405 Second  Edition         1972-06-12 [QCU]
    406 				10 UNIX installations
    407 Third   Edition         1973-02-xx [QCU]
    408 				Pipes, 16 installations
    409 Fourth  Edition         1973-11-xx [QCU]
    410 				rewriting in C effected,
    411                                 above 30 installations
    412 Fifth   Edition         1974-06-xx [QCU]
    413 				above 50 installations
    414 Sixth   Edition         1975-05-xx [QCU]
    415 				port to DEC Vax
    416 Seventh Edition         1979-01-xx [QCU] 1979-01-10 [TUHS]
    417 				first portable UNIX
    418 Eighth  Edition         1985-02-xx [QCU]
    419 				VAX 11/750, VAX 11/780 [dmr]
    420 				descended from 4.1c BSD [dmr]
    421 				descended from 4.1 BSD [44B]
    422 			scooping-out and replacement of the character-device
    423 			and networking part by the streams mechanism
    424 
    425 Ninth   Edition         1986-09-xx [QCU]
    426 Tenth   Edition         1989-10-xx [QCU]
    427 
    428 1BSD                    late 1977
    429 			1978-03-09 [QCU]
    430 				PDP-11, Pascal, ex(1)
    431 				30 free copies of 1BSD sent out
    432 				35 tapes sold for 50 USD [QCU]
    433 2BSD                    mid 1978 [QCU] 1979-05-10 [TUHS]
    434 				75 2BSD tapes shipped
    435 2.79BSD			1980-04-xx [TUHS]
    436 2.8BSD			1981-07-xx [KSJ]
    437 
    438 2.8.1BSD		1982-01-xx [QCU]
    439 				set of performance improvements
    440 2.9BSD			1983-07-xx [KSJ]
    441 2.9.1BSD                1983-11-xx [TUHS]
    442 2.9BSD-Seismo		1985-08-xx [SMS]
    443 2.10BSD			1987-04-xx [KKK]
    444 2.10.1BSD		1989-01-xx [SMS]
    445 2.11BSD			1992-02-xx [SMS]
    446 2.11BSD rev #430	1999-12-13 [SMS]
    447 
    448 32V			1978-1[01]-xx [QCU] 1979-03-26 [TUHS]
    449 3BSD                    late 1979 [QCU] March 1980 [TUHS]
    450 				virtual memory, page replacement,
    451                         	demand paging
    452 4.0BSD                  1980-10-xx
    453 4.1BSD                  1981-07-08 [DOC]
    454 4.1aBSD                 1982-04-xx
    455 				alpha release, 100 sites, networking [44B]
    456 4.1bBSD				internal release, fast filesystem [44B]
    457 4.1cBSD                 late 1982
    458 				beta release, IPC [44B]
    459 4.2BSD                  1983-09-xx [QCU]
    460                         1983-08-03 [DOC]
    461 4.3BSD                  1986-06-xx [QCU]
    462 			1986-04-05 [KB], [DOC]
    463 4.3BSD Tahoe            1988-06-15 [QCU], [DOC]
    464 4.3BSD NET/1            1988-11-xx [QCU]
    465                         1989-01-01 [DOC]
    466 4.3BSD Reno             1990-06-29 [QCU], [DOC]
    467 4.3BSD NET/2            1991-06-28 [QCU], [DOC]
    468 
    469 BSD/386 ALPHA		1991-12-xx [BSDI]
    470 				first code released to people outside BSDI
    471 386BSD 0.0              1992-02-xx [DOC]
    472 BSD/386 0.3.1	        1992-04-xx [BSDI] first ext. beta; B customers
    473 BSD/386 0.3.3		1992-06-xx [BSDI] first CDROM version
    474 386BSD 0.1              1992-07-28 [DOC]
    475 4.4BSD Alpha            1992-07-07
    476 BSD/386 0.9.3		1992-10-xx [BSDI]
    477 				first external gamma; G customers
    478 BSD/386 0.9.4		1992-12-xx [BSDI]
    479 				would have been 1.0 except for request
    480 				for preliminary injunction
    481 BSD/386 1.0 		1993-03-xx [BSDI]
    482 				injunction denied; first official release
    483 NetBSD 0.8              1993-04-20 [NBD]
    484 4.4BSD                  1993-06-01 [USE]
    485 NetBSD 0.9              1993-08-23 [NBD]
    486 FreeBSD 1.0		1993-11-01 [FBD]
    487 FreeBSD 1.0.2		1993-11-14 [FBD]
    488 				supersedes 1.0 13 days after release.
    489 BSD/386 1.1		1994-02-xx [BSDI]
    490 4.4BSD Lite             1994-03-01 [USE]
    491 FreeBSD 1.1		1994-05-07 [FBD]
    492 FreeBSD 1.1.5		1994-06-30 [FBD]
    493 FreeBSD 1.1.5.1		1994-07-05 [FBD]
    494 				supersedes 1.1.5 5 days after release.
    495 NetBSD 1.0              1994-10-26 [NBD]
    496 386BSD 1.0              1994-11-12 [USE]
    497 FreeBSD 2.0		1994-11-23 [FBD]
    498 BSD/OS 2.0		1995-01-xx [BSDI] 4.4 lite based
    499 FreeBSD 2.0.5		1995-06-10 [FBD]
    500 BSD/OS 2.0.1		1995-06-xx [BSDI]
    501 4.4BSD Lite Release 2	1995-06-xx [44B]
    502 				the true final distribution from the CSRG
    503 FreeBSD 2.1.0		1995-11-19 [FBD]
    504 NetBSD 1.1              1995-11-26 [NBD]
    505 BSD/OS 2.1		1996-01-xx [BSDI]
    506 FreeBSD 2.1.5		1996-07-14 [FBD]
    507 NetBSD 1.2              1996-10-04 [NBD]
    508 OpenBSD 2.0             1996-10-18 [OBD]
    509 FreeBSD 2.1.6		1996-11-16 [FBD]
    510 FreeBSD 2.1.6.1		1996-11-25 [FBD] (sendmail security release)
    511 Rhapsody		1997-xx-xx
    512 FreeBSD 2.1.7		1997-02-20 [FBD]
    513 BSD/OS 3.0		1997-02-xx [BSDI] 4.4 lite2 based
    514 FreeBSD 2.2.0		1997-03-16 [FBD]
    515 FreeBSD 2.2.1		1997-03-25 [FBD]
    516 FreeBSD 2.2.2		1997-05-16 [FBD]
    517 NetBSD 1.2.1            1997-05-20 [NBD] (patch release)
    518 OpenBSD 2.1             1997-06-01 [OBD]
    519 FreeBSD 2.2.5		1997-10-22 [FBD]
    520 OpenBSD 2.2             1997-12-01 [OBD]
    521 NetBSD 1.3              1998-01-04 [NBD]
    522 FreeBSD 2.2.6		1998-03-25 [FBD]
    523 NetBSD 1.3.1            1998-03-09 [NBD] (patch release)
    524 BSD/OS 3.1		1998-03-xx [BSDI]
    525 OpenBSD 2.3             1998-05-19 [OBD]
    526 NetBSD 1.3.2            1998-05-29 [NBD] (patch release)
    527 FreeBSD 2.2.7		1998-07-22 [FBD]
    528 BSD/OS 4.0		1998-08-xx [BSDI]
    529 				2-lock MP support, ELF executables
    530 FreeBSD 3.0		1998-10-16 [FBD]
    531 				FreeBSD-3.0 is a snapshot from -current,
    532 				while 3.1 and 3.2 are from 3.x-stable which
    533 				was branched quite some time after 3.0-release
    534 FreeBSD 2.2.8           1998-11-29 [FBD]
    535 OpenBSD 2.4             1998-12-01 [OBD]
    536 NetBSD 1.3.3            1998-12-23 [NBD] (patch release)
    537 FreeBSD 3.1		1999-02-15 [FBD]
    538 BSD/OS 4.0.1		1999-03-xx [BSDI]
    539 NetBSD 1.4              1999-05-12 [NBD]
    540 FreeBSD 3.2             1999-05-17 [FBD]
    541 OpenBSD 2.5             1999-05-19 [OBD]
    542 NetBSD 1.4.1            1999-08-26 [NBD] (patch release)
    543 FreeBSD 3.3             1999-09-17 [FBD]
    544 OpenBSD 2.6             1999-12-01 [OBD]
    545 FreeBSD 3.4             1999-12-20 [FBD]
    546 BSD/OS 4.1		1999-12-xx [BSDI]
    547 FreeBSD 4.0             2000-03-13 [FBD]
    548 NetBSD 1.4.2            2000-03-19 [NBD] (patch release)
    549 OpenBSD 2.7             2000-06-15 [OBD]
    550 FreeBSD 3.5		2000-06-24 [FBD]
    551 FreeBSD 4.1		2000-07-27 [FBD]
    552 FreeBSD 3.5.1		2000-07-28 [FBD]
    553 FreeBSD 4.1.1		2000-09-25 [FBD] (a network-only patch release)
    554 FreeBSD 4.2  		2000-11-21 [FBD]
    555 NetBSD 1.4.3		2000-11-25 [NBD] (patch release)
    556 BSD/OS 4.2		2000-11-29 [BSDI]
    557 OpenBSD 2.8		2000-12-01 [OBD]
    558 NetBSD 1.5              2000-12-06 [NBD]
    559 Mac OS X 10.0           2001-03-24 [APL]
    560 FreeBSD 4.3  		2001-04-20 [FBD]
    561 OpenBSD 2.9  		2001-06-01 [OBD]
    562 NetBSD 1.5.1		2001-07-11 [NBD] (patch release)
    563 NetBSD 1.5.2		2001-09-13 [NBD] (patch release)
    564 FreeBSD 4.4  		2001-09-18 [FBD]
    565 Mac OS X 10.1		2001-09-29 [APL]
    566 OpenBSD 3.0		2001-12-01 [OBD]
    567 FreeBSD 4.5  		2002-01-29 [FBD]
    568 BSD/OS 4.3		2002-03-14 [WRS]
    569 OpenBSD 3.1		2002-05-19 [OBD]
    570 FreeBSD 4.6  		2002-06-15 [FBD]
    571 NetBSD 1.5.3		2002-07-22 [NBD] (patch release)
    572 FreeBSD 4.6.2		2002-08-15 [FBD] (patch release)
    573 Mac OS X 10.2		2002-08-23 [APL]
    574 NetBSD 1.6		2002-09-14 [NBD]
    575 FreeBSD 4.7		2002-10-08 [FBD]
    576 OpenBSD 3.2		2002-11-01 [OBD]
    577 FreeBSD 5.0		2003-01-17 [FBD]
    578 				FreeBSD 5.0 is a separate branch off of
    579 				-current, similar to 3.0.
    580 FreeBSD 4.8		2003-04-03 [FBD]
    581 NetBSD 1.6.1		2003-04-21 [NBD] (patch release)
    582 OpenBSD 3.3		2003-05-01 [OBD]
    583 BSD/OS 5.0		2003-05-?? [WRS]
    584 FreeBSD 5.1		2003-06-09 [FBD]
    585 Mac OS X 10.3		2003-10-24 [APL]
    586 FreeBSD 4.9		2003-10-28 [FBD]
    587 BSD/OS 5.1 ISE		2003-10-?? [WRS] (final version)
    588 OpenBSD 3.4		2003-11-01 [OBD]
    589 FreeBSD 5.2		2004-01-12 [FBD]
    590 FreeBSD 5.2.1		2004-02-22 [FBD] (patch release)
    591 NetBSD 1.6.2		2004-03-01 [NBD] (patch release)
    592 OpenBSD 3.5		2004-04-01 [OBD]
    593 FreeBSD 4.10		2004-05-27 [FBD]
    594 DragonFly 1.0		2004-07-12 [DFB]
    595 OpenBSD 3.6		2004-10-29 [OBD]
    596 FreeBSD 5.3		2004-11-06 [FBD]
    597 NetBSD 2.0		2004-12-09 [NBD]
    598 FreeBSD 4.11		2005-01-25 [FBD]
    599 DragonFly 1.2.0		2005-04-08 [DFB]
    600 NetBSD 2.0.2		2005-04-14 [NBD] (security/critical release)
    601 Mac OS X 10.4		2005-04-29 [APL]
    602 FreeBSD 5.4		2005-05-09 [FBD]
    603 OpenBSD 3.7		2005-05-19 [OBD]
    604 NetBSD 2.0.3		2005-10-31 [NBD] (security/critical release)
    605 OpenBSD 3.8		2005-11-01 [OBD]
    606 FreeBSD 6.0		2005-11-01 [FBD]
    607 NetBSD 2.1		2005-11-02 [NBD]
    608 NetBSD 3.0		2005-12-23 [NBD]
    609 DragonFly 1.4.0		2006-01-08 [DFB]
    610 FreeBSD 2.2.9		2006-04-01 [FBD]
    611 OpenBSD 3.9		2006-05-01 [OBD]
    612 FreeBSD 6.1		2006-05-08 [FBD]
    613 FreeBSD 5.5		2006-05-25 [FBD]
    614 NetBSD 3.0.1		2006-07-24 [NBD] (security/critical release)
    615 DragonFly 1.6.0		2006-07-24 [DFB]
    616 OpenBSD 4.0		2006-11-01 [OBD]
    617 NetBSD 3.0.2		2006-11-04 [NBD] (security/critical release)
    618 NetBSD 3.1		2006-11-04 [NBD]
    619 FreeBSD 6.2		2007-01-15 [FBD]
    620 DragonFly 1.8.0		2007-01-30 [DFB]
    621 OpenBSD 4.1		2007-05-01 [OBD]
    622 DragonFly 1.10.0	2007-08-06 [DFB]
    623 Mac OS X 10.5		2007-10-26 [APL]
    624 OpenBSD 4.2		2007-11-01 [OBD]
    625 NetBSD 4.0		2007-12-19 [NBD]
    626 FreeBSD 6.3		2008-01-18 [FBD]
    627 DragonFly 1.12.0	2008-02-26 [DFB]
    628 FreeBSD 7.0		2008-02-27 [FBD]
    629 OpenBSD 4.3		2008-05-01 [OBD]
    630 DragonFly 2.0.0		2008-07-21 [DFB]
    631 OpenBSD 4.4		2008-11-01 [OBD]
    632 FreeBSD 6.4		2008-11-28 [FBD]
    633 FreeBSD 7.1		2009-01-04 [FBD]
    634 DragonFly 2.2.0		2009-02-17 [DFB]
    635 NetBSD 5.0		2009-04-29 [NBD]
    636 OpenBSD 4.5		2009-05-01 [OBD]
    637 FreeBSD 7.2		2009-05-04 [FBD]
    638 Mac OS X 10.6		2009-06-08 [APL]
    639 NetBSD 5.0.1		2009-08-02 [NBD] (security/critical release)
    640 DragonFly 2.4.0		2009-09-16 [DFB]
    641 OpenBSD 4.6		2009-10-18 [OBD]
    642 FreeBSD 8.0		2009-11-26 [FBD]
    643 NetBSD 5.0.2		2010-02-12 [NBD] (security/critical release)
    644 FreeBSD 7.3		2010-03-23 [FBD]
    645 DragonFly 2.6.0		2010-03-28 [DFB]
    646 OpenBSD 4.7		2010-05-19 [OBD]
    647 FreeBSD 8.1		2010-07-24 [FBD]
    648 DragonFly 2.8.2		2010-10-30 [DFB]
    649 OpenBSD 4.8		2010-11-01 [OBD]
    650 NetBSD 5.1		2010-11-19 [NBD]
    651 FreeBSD 7.4		2011-02-24 [FBD]
    652 FreeBSD 8.2		2011-02-24 [FBD]
    653 DragonFly 2.10.1	2011-04-26 [DFB]
    654 OpenBSD 4.9		2011-05-01 [OBD]
    655 Mac OS X 10.7		2011-07-20 [APL]
    656 OpenBSD 5.0		2011-11-01 [OBD]
    657 FreeBSD 9.0		2012-01-12 [FBD]
    658 NetBSD 5.1.2		2012-02-02 [NBD] (security/critical release)
    659 DragonFly 3.0.1		2012-02-21 [DFB]
    660 FreeBSD 8.3		2012-04-18 [FBD]
    661 OpenBSD 5.1		2012-05-01 [OBD]
    662 Mac OS X 10.8		2012-07-25 [APL]
    663 NetBSD 6.0		2012-10-17 [NBD]
    664 OpenBSD 5.2		2012-11-01 [OBD]
    665 DragonFly 3.2.1		2012-11-02 [DFB]
    666 NetBSD 5.2		2012-12-03 [NBD]
    667 NetBSD 6.0.1		2012-12-26 [NBD] (security/critical release)
    668 FreeBSD 9.1		2012-12-30 [FBD]
    669 DragonFly 3.4.1		2013-04-29 [DFB]
    670 OpenBSD 5.3		2013-05-01 [OBD]
    671 NetBSD 6.0.2		2013-05-18 [NBD] (security/critical release)
    672 NetBSD 6.1		2013-05-18 [NBD]
    673 FreeBSD 8.4		2013-06-07 [FBD]
    674 NetBSD 6.1.1		2013-08-22 [NBD]
    675 NetBSD 5.1.3		2013-09-29 [NBD]
    676 NetBSD 5.2.1		2013-09-29 [NBD]
    677 FreeBSD 9.2		2013-09-30 [FBD]
    678 NetBSD 6.0.3		2013-09-30 [NBD]
    679 NetBSD 6.1.2		2013-09-30 [NBD]
    680 Mac OS X 10.9		2013-10-22 [APL]
    681 OpenBSD 5.4		2013-11-01 [OBD]
    682 DragonFly 3.6.0 	2013-11-25 [DFB]
    683 FreeBSD 10.0		2014-01-20 [FBD]
    684 NetBSD 5.1.4		2014-01-25 [NBD]
    685 NetBSD 5.2.2		2014-01-25 [NBD]
    686 NetBSD 6.0.4		2014-01-25 [NBD]
    687 NetBSD 6.1.3		2014-01-25 [NBD]
    688 DragonFly 3.6.1 	2014-02-22 [DFB]
    689 DragonFly 3.6.2		2014-04-10 [DFB]
    690 NetBSD 6.0.5		2014-04-12 [NDB]
    691 NetBSD 6.1.4		2014-04-12 [NDB]
    692 OpenBSD 5.5		2014-05-01 [OBD]
    693 DragonFly 3.8.0		2014-06-04 [DFB]
    694 DragonFly 3.8.1		2014-06-16 [DFB]
    695 DragonFly 3.6.3		2014-06-17 [DFB]
    696 FreeBSD 9.3		2014-07-05 [FBD]
    697 DragonFly 3.8.2		2014-08-08 [DFB]
    698 NetBSD 6.1.5		2014-09-22 [NBD]
    699 Mac OS X 10.10		2014-10-16 [APL]
    700 OpenBSD 5.6		2014-11-01 [OBD]
    701 FreeBSD 10.1		2014-11-14 [FBD]
    702 DragonFly 4.0.1		2014-11-25 [DFB]
    703 DragonFly 4.0.2		2015-01-07 [DFB]
    704 DragonFly 4.0.3		2015-01-21 [DFB]
    705 DragonFly 4.0.4		2015-03-09 [DFB]
    706 DragonFly 4.0.5		2015-03-23 [DFB]
    707 OpenBSD 5.7		2015-05-01 [OBD]
    708 DragonFly 4.2.0		2015-06-29 [DFB]
    709 FreeBSD 10.2            2015-08-13 [FBD]
    710 NetBSD 7.0		2015-09-25 [NBD]
    711 OS X 10.11		2015-09-30 [APL]
    712 OpenBSD 5.8		2015-10-18 [OBD]
    713 DragonFly 4.4.1		2015-12-07 [DFB]
    714 OpenBSD 5.9		2016-03-29 [OBD]
    715 FreeBSD 10.3		2016-04-04 [FBD]
    716 NetBSD 7.0.1		2016-05-22 [NBD]
    717 DragonFly 4.6.0		2016-08-02 [DFB]
    718 OpenBSD 6.0		2016-09-01 [OBD]
    719 macOS 10.12		2016-09-20 [APL]
    720 NetBSD 7.0.2		2016-10-21 [NBD]
    721 FreeBSD 11.0		2016-10-10 [FBD]
    722 NetBSD 7.1		2017-03-11 [NBD]
    723 DragonFly 4.8.0		2017-03-27 [DFB]
    724 OpenBSD 6.1		2017-04-11 [OBD]
    725 FreeBSD 11.1		2017-07-26 [FBD]
    726 macOS 10.13		2017-09-25 [APL]
    727 FreeBSD 10.4		2017-10-03 [FBD]
    728 OpenBSD 6.2		2017-10-09 [OBD]
    729 DragonFly 5.0.0		2017-10-16 [DFB]
    730 DragonFly 5.0.1		2017-11-06 [DFB]
    731 DragonFly 5.0.2		2017-12-04 [DFB]
    732 
    733 Bibliography
    734 ------------------------
    735 
    736 Leffler, Samuel J., Marshall Kirk McKusick, Michael J Karels and John
    737 Quarterman. The Design and Implementation of the 4.3BSD UNIX Operating
    738 System. Reading, Mass. Addison-Wesley, 1989. ISBN 0-201-06196-1
    739 
    740 Salus, Peter H. A quarter century of UNIX. Addison-Wesley Publishing
    741 Company, Inc., 1994. ISBN 0-201-54777-5
    742 
    743 McKusick, Marshall Kirk, Keith Bostic, Michael J Karels, and John
    744 Quarterman. The Design and Implementation of the 4.4BSD Operating
    745 System. Reading, Mass. Addison-Wesley, 1996. ISBN 0-201-54979-4
    746 
    747 McKusick, Marshall Kirk, George Neville-Neil. The Design and
    748 Implementation of the FreeBSD Operating System.
    749 Addison-Wesley Professional, Published: Aug 2, 2004. ISBN 0-201-70245-2
    750 
    751 McKusick, Marshall Kirk, George Neville-Neil, Robert Watson. The
    752 Design and Implementation of the FreeBSD Operating System, 2nd Edition.
    753 Pearson Education, Inc., 2014. ISBN 0-321-96897-2
    754 
    755 Doug McIlroy. Research Unix Reader.
    756 
    757 Michael G. Brown. The Role of BSD in the Development of Unix.
    758 Presented to the Tasmanian Unix Special Interest Group of the
    759 Australian Computer Society, Hobart, August 1993.
    760 
    761 Peter H. Salus. Unix at 25. Byte Magazine, October 1994.
    762 URL: http://www.byte.com/art/9410/sec8/art3.htm
    763 
    764 Andreas Klemm, Lars Kller. If you're going to San Francisco ...
    765 Die freien BSD-Varianten von Unix. c't April 1997, page 368ff.
    766 
    767 BSD Release Announcements collection.
    768 URL: https://www.FreeBSD.org/releases/
    769 
    770 BSD Hypertext Man Pages
    771 URL: https://www.FreeBSD.org/cgi/man.cgi
    772 
    773 UNIX history graphing project
    774 URL: http://minnie.tuhs.org/Unix_History/index.html
    775 
    776 UNIX history
    777 URL: http://www.levenez.com/unix/
    778 
    779 James Howard: The BSD Family Tree
    780 URL: http://ezine.daemonnews.org/200104/bsd_family.html
    781 ("what are the differences between FreeBSD, NetBSD, and OpenBSD?")
    782 
    783 
    784 Acknowledgments
    785 ---------------
    786 
    787 Josh Gilliam for suggestions, bug fixes, and finding very old
    788 original BSD announcements from Usenet or tapes.
    789 
    790 Steven M. Schultz for providing 2.8BSD, 2.10BSD, 2.11BSD manual pages.
    791 
    792 --
    793 Copyright (c) 1997-2012 Wolfram Schneider <wosch (a] FreeBSD.ORG>
    794 URL: http://svnweb.freebsd.org/base/head/share/misc/bsd-family-tree
    795 
    796 $FreeBSD: head/share/misc/bsd-family-tree 326869 2017-12-15 03:46:52Z eadler $
    797 $NetBSD: bsd-family-tree,v 1.64 2017/12/16 07:16:03 sevan Exp $
    798