Home | History | Annotate | Line # | Download | only in misc
bsd-family-tree revision 1.66
      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      |                       |
    295  |     |       |      |      | |    6.0.6      |                       |
    296  |     |       |      |      | |               |                       |
    297  |     |       |      |      | |`-NetBSD 6.1   |                       |
    298  |     |    FreeBSD   |      |       |         |                       |
    299  |     |      8.4     |      |    NetBSD 6.1.1 |                       |
    300  |     |              |      |       |         |                       |
    301  |  FreeBSD           |      |    NetBSD 6.1.2 |                       |
    302  |    9.2          Mac OS X  |       |         |                       |
    303  |     |             10.9    |       |    OpenBSD 5.4                  |
    304  |     `-----.        |      |       |         |               DragonFly 3.6.0
    305  |            \       |      |       |         |                       |
    306  *--FreeBSD    |      |      |    NetBSD 6.1.3 |                       |
    307  |   10.0      |      |      |       |         |                       |
    308  |     |       |      |      |       |         |               DragonFly 3.6.1
    309  |     |       |      |      |       |         |                       |
    310  |     |       |      |      |       |         |                       |
    311  |     |       |      |      |       |         |               DragonFly 3.6.2
    312  |     |       |      |      |    NetBSD 6.1.4 |                       |
    313  |     |       |      |      |       |         |                       |
    314  |     |       |      |      |       |    OpenBSD 5.5                  |
    315  |     |       |      |      |       |         |                       |
    316  |     |       |      |      |       |         |               DragonFly 3.8.0
    317  |     |       |      |      |       |         |                       |
    318  |     |       |      |      |       |         |                       |
    319  |     |       |      |      |       |         |               DragonFly 3.8.1
    320  |     |       |      |      |       |         |                       |
    321  |     |       |      |      |       |         |                       |
    322  |     |       |      |      |       |         |               DragonFly 3.6.3
    323  |     |       |      |      |       |         |                       |
    324  |     |    FreeBSD   |      |       |         |                       |
    325  |     |      9.3     |      |       |         |                       |
    326  |     |              |      |    NetBSD 6.1.5 |               DragonFly 3.8.2
    327  |     |           Mac OS X  |                 |                       |
    328  |     |             10.10   |                 |                       |
    329  |     |              |      |            OpenBSD 5.6                  |
    330  |  FreeBSD           |      |                 |                       |
    331  |   10.1             |      |                 |               DragonFly 4.0.1
    332  |     |              |      |                 |                       |
    333  |     |              |      |                 |               DragonFly 4.0.2
    334  |     |              |      |                 |                       |
    335  |     |              |      |                 |               DragonFly 4.0.3
    336  |     |              |      |                 |                       |
    337  |     |              |      |                 |               DragonFly 4.0.4
    338  |     |              |      |                 |                       |
    339  |     |              |      |                 |               DragonFly 4.0.5
    340  |     |              |      |                 |                       |
    341  |     |              |      |            OpenBSD 5.7                  |
    342  |     |              |      |                 |               DragonFly 4.2.0
    343  |  FreeBSD           |      |                 |                       |
    344  |   10.2             |      |                 |                       |
    345  |     |            macOS  NetBSD 7.0          |                       |
    346  |     |            10.11   | | |         OpenBSD 5.8                  |
    347  |     |              |     | | `--.           |               DragonFly 4.4.1
    348  |  FreeBSD           |     | |    |      OpenBSD 5.9                  |
    349  |   10.3             |     | |    |           |                       |
    350  |     |              |     | | NetBSD 7.0.1   |                       |
    351  |     `------.       |     | |    |           |               DragonFly 4.6.0
    352  |            |       |     | |    |           |                       |
    353  |            |       |     | |    |           |                       |
    354  *--FreeBSD   |     macOS   | |    |      OpenBSD 6.0                  |
    355  |   11.0     |     10.12   | | NetBSD 7.0.2   |                       |
    356  |     |      |       |     | |                |                       |
    357  |     |      |       |     | *- NetBSD 7.1    |                       |
    358  |     |      |       |     |      |           |                       |
    359  |     |      |       |     |      |           |                       |
    360  |     |      |     macOS   |      |           |               DragonFly 4.8.0
    361  |     |      |     10.13   |      |      OpenBSD 6.1                  |
    362  |  FreeBSD   |       |     |      |           |               DragonFly 5.0.0
    363  |   11.1  FreeBSD    |     |      |           |                       |
    364  |     |    10.4      |     |      |      OpenBSD 6.2          DragonFly 5.0.1
    365  |     |              |     |      |           |                       |
    366  |     |              |     |  NetBSD 7.1.1    |               DragonFly 5.0.2
    367  |     |              |     |      |           |                       |
    368  |     |              |     |  NetBSD 7.1.2    |                       |
    369  |     |              |     |      |           |                       |
    370  |     |              |     |      |      OpenBSD 6.3                  |
    371  |     |              |     |      |           |               DragonFly 5.2.0
    372  |     |              |     |      v           |                       |
    373  |     v              |     |                  |                       |
    374  |                    |     |                  |                       |
    375 FreeBSD 12 -current   | NetBSD -current   OpenBSD -current    DragonFly -current
    376  |                    |     |                  |                       |
    377  v                    v     v                  v                       v
    378 
    379 Time
    380 ----------------
    381 
    382 Time tolerance +/- 6 months, depending on which book/article you read; if it
    383 was the announcement in Usenet or if it was available as tape.
    384 
    385 [44B] McKusick, Marshall Kirk, Keith Bostic, Michael J Karels,
    386 	and John Quarterman. The Design and Implementation of
    387 	the 4.4BSD Operating System.
    388 [APL] Apple website [https://www.apple.com/macosx/]
    389 [BSDI] Berkeley Software Design, Inc.
    390 [DFB] DragonFlyBSD Project, The.
    391 [DOC] README, COPYRIGHT on tape.
    392 [FBD] FreeBSD Project, The.
    393 [KB]  Keith Bostic. BSD2.10 available from Usenix. comp.unix.sources,
    394 	Volume 11, Info 4, April, 1987.
    395 [KKK] Mike Karels, Kirk McKusick, and Keith Bostic. tahoe announcement.
    396 	comp.bugs.4bsd.ucb-fixes, June 15, 1988.
    397 [KSJ] Michael J. Karels, Carl F. Smith, and William F. Jolitz.
    398 	Changes in the Kernel in 2.9BSD. Second Berkeley Software
    399 	Distribution UNIX Version 2.9, July, 1983.
    400 [NBD] NetBSD Project, The.
    401 [OBD] OpenBSD Project, The.
    402 [QCU] Salus, Peter H. A quarter century of UNIX.
    403 [SMS] Steven M. Schultz. 2.11BSD, UNIX for the PDP-11.
    404 [TUHS] The Unix Historical Society.  http://minnie.tuhs.org/Unix_History/.
    405 [USE] Usenet announcement.
    406 [WRS] Wind River Systems, Inc.
    407 [dmr] Dennis Ritchie, via E-Mail
    408 
    409 Multics                 1965
    410 UNIX                    Summer 1969
    411 				DEC PDP-7
    412 First   Edition         1971-11-03 [QCU]
    413 				DEC PDP-11/20, Assembler
    414 Second  Edition         1972-06-12 [QCU]
    415 				10 UNIX installations
    416 Third   Edition         1973-02-xx [QCU]
    417 				Pipes, 16 installations
    418 Fourth  Edition         1973-11-xx [QCU]
    419 				rewriting in C effected,
    420                                 above 30 installations
    421 Fifth   Edition         1974-06-xx [QCU]
    422 				above 50 installations
    423 Sixth   Edition         1975-05-xx [QCU]
    424 				port to DEC Vax
    425 Seventh Edition         1979-01-xx [QCU] 1979-01-10 [TUHS]
    426 				first portable UNIX
    427 Eighth  Edition         1985-02-xx [QCU]
    428 				VAX 11/750, VAX 11/780 [dmr]
    429 				descended from 4.1c BSD [dmr]
    430 				descended from 4.1 BSD [44B]
    431 			scooping-out and replacement of the character-device
    432 			and networking part by the streams mechanism
    433 
    434 Ninth   Edition         1986-09-xx [QCU]
    435 Tenth   Edition         1989-10-xx [QCU]
    436 
    437 1BSD                    late 1977
    438 			1978-03-09 [QCU]
    439 				PDP-11, Pascal, ex(1)
    440 				30 free copies of 1BSD sent out
    441 				35 tapes sold for 50 USD [QCU]
    442 2BSD                    mid 1978 [QCU] 1979-05-10 [TUHS]
    443 				75 2BSD tapes shipped
    444 2.79BSD			1980-04-xx [TUHS]
    445 2.8BSD			1981-07-xx [KSJ]
    446 
    447 2.8.1BSD		1982-01-xx [QCU]
    448 				set of performance improvements
    449 2.9BSD			1983-07-xx [KSJ]
    450 2.9.1BSD                1983-11-xx [TUHS]
    451 2.9BSD-Seismo		1985-08-xx [SMS]
    452 2.10BSD			1987-04-xx [KKK]
    453 2.10.1BSD		1989-01-xx [SMS]
    454 2.11BSD			1992-02-xx [SMS]
    455 2.11BSD rev #430	1999-12-13 [SMS]
    456 
    457 32V			1978-1[01]-xx [QCU] 1979-03-26 [TUHS]
    458 3BSD                    late 1979 [QCU] March 1980 [TUHS]
    459 				virtual memory, page replacement,
    460                         	demand paging
    461 4.0BSD                  1980-10-xx
    462 4.1BSD                  1981-07-08 [DOC]
    463 4.1aBSD                 1982-04-xx
    464 				alpha release, 100 sites, networking [44B]
    465 4.1bBSD				internal release, fast filesystem [44B]
    466 4.1cBSD                 late 1982
    467 				beta release, IPC [44B]
    468 4.2BSD                  1983-09-xx [QCU]
    469                         1983-08-03 [DOC]
    470 4.3BSD                  1986-06-xx [QCU]
    471 			1986-04-05 [KB], [DOC]
    472 4.3BSD Tahoe            1988-06-15 [QCU], [DOC]
    473 4.3BSD NET/1            1988-11-xx [QCU]
    474                         1989-01-01 [DOC]
    475 4.3BSD Reno             1990-06-29 [QCU], [DOC]
    476 4.3BSD NET/2            1991-06-28 [QCU], [DOC]
    477 
    478 BSD/386 ALPHA		1991-12-xx [BSDI]
    479 				first code released to people outside BSDI
    480 386BSD 0.0              1992-02-xx [DOC]
    481 BSD/386 0.3.1	        1992-04-xx [BSDI] first ext. beta; B customers
    482 BSD/386 0.3.3		1992-06-xx [BSDI] first CDROM version
    483 386BSD 0.1              1992-07-28 [DOC]
    484 4.4BSD Alpha            1992-07-07
    485 BSD/386 0.9.3		1992-10-xx [BSDI]
    486 				first external gamma; G customers
    487 BSD/386 0.9.4		1992-12-xx [BSDI]
    488 				would have been 1.0 except for request
    489 				for preliminary injunction
    490 BSD/386 1.0 		1993-03-xx [BSDI]
    491 				injunction denied; first official release
    492 NetBSD 0.8              1993-04-20 [NBD]
    493 4.4BSD                  1993-06-01 [USE]
    494 NetBSD 0.9              1993-08-23 [NBD]
    495 FreeBSD 1.0		1993-11-01 [FBD]
    496 FreeBSD 1.0.2		1993-11-14 [FBD]
    497 				supersedes 1.0 13 days after release.
    498 BSD/386 1.1		1994-02-xx [BSDI]
    499 4.4BSD Lite             1994-03-01 [USE]
    500 FreeBSD 1.1		1994-05-07 [FBD]
    501 FreeBSD 1.1.5		1994-06-30 [FBD]
    502 FreeBSD 1.1.5.1		1994-07-05 [FBD]
    503 				supersedes 1.1.5 5 days after release.
    504 NetBSD 1.0              1994-10-26 [NBD]
    505 386BSD 1.0              1994-11-12 [USE]
    506 FreeBSD 2.0		1994-11-23 [FBD]
    507 BSD/OS 2.0		1995-01-xx [BSDI] 4.4 lite based
    508 FreeBSD 2.0.5		1995-06-10 [FBD]
    509 BSD/OS 2.0.1		1995-06-xx [BSDI]
    510 4.4BSD Lite Release 2	1995-06-xx [44B]
    511 				the true final distribution from the CSRG
    512 FreeBSD 2.1.0		1995-11-19 [FBD]
    513 NetBSD 1.1              1995-11-26 [NBD]
    514 BSD/OS 2.1		1996-01-xx [BSDI]
    515 FreeBSD 2.1.5		1996-07-14 [FBD]
    516 NetBSD 1.2              1996-10-04 [NBD]
    517 OpenBSD 2.0             1996-10-18 [OBD]
    518 FreeBSD 2.1.6		1996-11-16 [FBD]
    519 FreeBSD 2.1.6.1		1996-11-25 [FBD] (sendmail security release)
    520 Rhapsody		1997-xx-xx
    521 FreeBSD 2.1.7		1997-02-20 [FBD]
    522 BSD/OS 3.0		1997-02-xx [BSDI] 4.4 lite2 based
    523 FreeBSD 2.2.0		1997-03-16 [FBD]
    524 FreeBSD 2.2.1		1997-03-25 [FBD]
    525 FreeBSD 2.2.2		1997-05-16 [FBD]
    526 NetBSD 1.2.1            1997-05-20 [NBD] (patch release)
    527 OpenBSD 2.1             1997-06-01 [OBD]
    528 FreeBSD 2.2.5		1997-10-22 [FBD]
    529 OpenBSD 2.2             1997-12-01 [OBD]
    530 NetBSD 1.3              1998-01-04 [NBD]
    531 FreeBSD 2.2.6		1998-03-25 [FBD]
    532 NetBSD 1.3.1            1998-03-09 [NBD] (patch release)
    533 BSD/OS 3.1		1998-03-xx [BSDI]
    534 OpenBSD 2.3             1998-05-19 [OBD]
    535 NetBSD 1.3.2            1998-05-29 [NBD] (patch release)
    536 FreeBSD 2.2.7		1998-07-22 [FBD]
    537 BSD/OS 4.0		1998-08-xx [BSDI]
    538 				2-lock MP support, ELF executables
    539 FreeBSD 3.0		1998-10-16 [FBD]
    540 				FreeBSD-3.0 is a snapshot from -current,
    541 				while 3.1 and 3.2 are from 3.x-stable which
    542 				was branched quite some time after 3.0-release
    543 FreeBSD 2.2.8           1998-11-29 [FBD]
    544 OpenBSD 2.4             1998-12-01 [OBD]
    545 NetBSD 1.3.3            1998-12-23 [NBD] (patch release)
    546 FreeBSD 3.1		1999-02-15 [FBD]
    547 BSD/OS 4.0.1		1999-03-xx [BSDI]
    548 NetBSD 1.4              1999-05-12 [NBD]
    549 FreeBSD 3.2             1999-05-17 [FBD]
    550 OpenBSD 2.5             1999-05-19 [OBD]
    551 NetBSD 1.4.1            1999-08-26 [NBD] (patch release)
    552 FreeBSD 3.3             1999-09-17 [FBD]
    553 OpenBSD 2.6             1999-12-01 [OBD]
    554 FreeBSD 3.4             1999-12-20 [FBD]
    555 BSD/OS 4.1		1999-12-xx [BSDI]
    556 FreeBSD 4.0             2000-03-13 [FBD]
    557 NetBSD 1.4.2            2000-03-19 [NBD] (patch release)
    558 OpenBSD 2.7             2000-06-15 [OBD]
    559 FreeBSD 3.5		2000-06-24 [FBD]
    560 FreeBSD 4.1		2000-07-27 [FBD]
    561 FreeBSD 3.5.1		2000-07-28 [FBD]
    562 FreeBSD 4.1.1		2000-09-25 [FBD] (a network-only patch release)
    563 FreeBSD 4.2  		2000-11-21 [FBD]
    564 NetBSD 1.4.3		2000-11-25 [NBD] (patch release)
    565 BSD/OS 4.2		2000-11-29 [BSDI]
    566 OpenBSD 2.8		2000-12-01 [OBD]
    567 NetBSD 1.5              2000-12-06 [NBD]
    568 Mac OS X 10.0           2001-03-24 [APL]
    569 FreeBSD 4.3  		2001-04-20 [FBD]
    570 OpenBSD 2.9  		2001-06-01 [OBD]
    571 NetBSD 1.5.1		2001-07-11 [NBD] (patch release)
    572 NetBSD 1.5.2		2001-09-13 [NBD] (patch release)
    573 FreeBSD 4.4  		2001-09-18 [FBD]
    574 Mac OS X 10.1		2001-09-29 [APL]
    575 OpenBSD 3.0		2001-12-01 [OBD]
    576 FreeBSD 4.5  		2002-01-29 [FBD]
    577 BSD/OS 4.3		2002-03-14 [WRS]
    578 OpenBSD 3.1		2002-05-19 [OBD]
    579 FreeBSD 4.6  		2002-06-15 [FBD]
    580 NetBSD 1.5.3		2002-07-22 [NBD] (patch release)
    581 FreeBSD 4.6.2		2002-08-15 [FBD] (patch release)
    582 Mac OS X 10.2		2002-08-23 [APL]
    583 NetBSD 1.6		2002-09-14 [NBD]
    584 FreeBSD 4.7		2002-10-08 [FBD]
    585 OpenBSD 3.2		2002-11-01 [OBD]
    586 FreeBSD 5.0		2003-01-17 [FBD]
    587 				FreeBSD 5.0 is a separate branch off of
    588 				-current, similar to 3.0.
    589 FreeBSD 4.8		2003-04-03 [FBD]
    590 NetBSD 1.6.1		2003-04-21 [NBD] (patch release)
    591 OpenBSD 3.3		2003-05-01 [OBD]
    592 BSD/OS 5.0		2003-05-?? [WRS]
    593 FreeBSD 5.1		2003-06-09 [FBD]
    594 Mac OS X 10.3		2003-10-24 [APL]
    595 FreeBSD 4.9		2003-10-28 [FBD]
    596 BSD/OS 5.1 ISE		2003-10-?? [WRS] (final version)
    597 OpenBSD 3.4		2003-11-01 [OBD]
    598 FreeBSD 5.2		2004-01-12 [FBD]
    599 FreeBSD 5.2.1		2004-02-22 [FBD] (patch release)
    600 NetBSD 1.6.2		2004-03-01 [NBD] (patch release)
    601 OpenBSD 3.5		2004-04-01 [OBD]
    602 FreeBSD 4.10		2004-05-27 [FBD]
    603 DragonFly 1.0		2004-07-12 [DFB]
    604 OpenBSD 3.6		2004-10-29 [OBD]
    605 FreeBSD 5.3		2004-11-06 [FBD]
    606 NetBSD 2.0		2004-12-09 [NBD]
    607 FreeBSD 4.11		2005-01-25 [FBD]
    608 DragonFly 1.2.0		2005-04-08 [DFB]
    609 NetBSD 2.0.2		2005-04-14 [NBD] (security/critical release)
    610 Mac OS X 10.4		2005-04-29 [APL]
    611 FreeBSD 5.4		2005-05-09 [FBD]
    612 OpenBSD 3.7		2005-05-19 [OBD]
    613 NetBSD 2.0.3		2005-10-31 [NBD] (security/critical release)
    614 OpenBSD 3.8		2005-11-01 [OBD]
    615 FreeBSD 6.0		2005-11-01 [FBD]
    616 NetBSD 2.1		2005-11-02 [NBD]
    617 NetBSD 3.0		2005-12-23 [NBD]
    618 DragonFly 1.4.0		2006-01-08 [DFB]
    619 FreeBSD 2.2.9		2006-04-01 [FBD]
    620 OpenBSD 3.9		2006-05-01 [OBD]
    621 FreeBSD 6.1		2006-05-08 [FBD]
    622 FreeBSD 5.5		2006-05-25 [FBD]
    623 NetBSD 3.0.1		2006-07-24 [NBD] (security/critical release)
    624 DragonFly 1.6.0		2006-07-24 [DFB]
    625 OpenBSD 4.0		2006-11-01 [OBD]
    626 NetBSD 3.0.2		2006-11-04 [NBD] (security/critical release)
    627 NetBSD 3.1		2006-11-04 [NBD]
    628 FreeBSD 6.2		2007-01-15 [FBD]
    629 DragonFly 1.8.0		2007-01-30 [DFB]
    630 OpenBSD 4.1		2007-05-01 [OBD]
    631 DragonFly 1.10.0	2007-08-06 [DFB]
    632 Mac OS X 10.5		2007-10-26 [APL]
    633 OpenBSD 4.2		2007-11-01 [OBD]
    634 NetBSD 4.0		2007-12-19 [NBD]
    635 FreeBSD 6.3		2008-01-18 [FBD]
    636 DragonFly 1.12.0	2008-02-26 [DFB]
    637 FreeBSD 7.0		2008-02-27 [FBD]
    638 OpenBSD 4.3		2008-05-01 [OBD]
    639 DragonFly 2.0.0		2008-07-21 [DFB]
    640 OpenBSD 4.4		2008-11-01 [OBD]
    641 FreeBSD 6.4		2008-11-28 [FBD]
    642 FreeBSD 7.1		2009-01-04 [FBD]
    643 DragonFly 2.2.0		2009-02-17 [DFB]
    644 NetBSD 5.0		2009-04-29 [NBD]
    645 OpenBSD 4.5		2009-05-01 [OBD]
    646 FreeBSD 7.2		2009-05-04 [FBD]
    647 Mac OS X 10.6		2009-06-08 [APL]
    648 NetBSD 5.0.1		2009-08-02 [NBD] (security/critical release)
    649 DragonFly 2.4.0		2009-09-16 [DFB]
    650 OpenBSD 4.6		2009-10-18 [OBD]
    651 FreeBSD 8.0		2009-11-26 [FBD]
    652 NetBSD 5.0.2		2010-02-12 [NBD] (security/critical release)
    653 FreeBSD 7.3		2010-03-23 [FBD]
    654 DragonFly 2.6.0		2010-03-28 [DFB]
    655 OpenBSD 4.7		2010-05-19 [OBD]
    656 FreeBSD 8.1		2010-07-24 [FBD]
    657 DragonFly 2.8.2		2010-10-30 [DFB]
    658 OpenBSD 4.8		2010-11-01 [OBD]
    659 NetBSD 5.1		2010-11-19 [NBD]
    660 FreeBSD 7.4		2011-02-24 [FBD]
    661 FreeBSD 8.2		2011-02-24 [FBD]
    662 DragonFly 2.10.1	2011-04-26 [DFB]
    663 OpenBSD 4.9		2011-05-01 [OBD]
    664 Mac OS X 10.7		2011-07-20 [APL]
    665 OpenBSD 5.0		2011-11-01 [OBD]
    666 FreeBSD 9.0		2012-01-12 [FBD]
    667 NetBSD 5.1.2		2012-02-02 [NBD] (security/critical release)
    668 DragonFly 3.0.1		2012-02-21 [DFB]
    669 FreeBSD 8.3		2012-04-18 [FBD]
    670 OpenBSD 5.1		2012-05-01 [OBD]
    671 Mac OS X 10.8		2012-07-25 [APL]
    672 NetBSD 6.0		2012-10-17 [NBD]
    673 OpenBSD 5.2		2012-11-01 [OBD]
    674 DragonFly 3.2.1		2012-11-02 [DFB]
    675 NetBSD 5.2		2012-12-03 [NBD]
    676 NetBSD 6.0.1		2012-12-26 [NBD] (security/critical release)
    677 FreeBSD 9.1		2012-12-30 [FBD]
    678 DragonFly 3.4.1		2013-04-29 [DFB]
    679 OpenBSD 5.3		2013-05-01 [OBD]
    680 NetBSD 6.0.2		2013-05-18 [NBD] (security/critical release)
    681 NetBSD 6.1		2013-05-18 [NBD]
    682 FreeBSD 8.4		2013-06-07 [FBD]
    683 NetBSD 6.1.1		2013-08-22 [NBD]
    684 NetBSD 5.1.3		2013-09-29 [NBD]
    685 NetBSD 5.2.1		2013-09-29 [NBD]
    686 FreeBSD 9.2		2013-09-30 [FBD]
    687 NetBSD 6.0.3		2013-09-30 [NBD]
    688 NetBSD 6.1.2		2013-09-30 [NBD]
    689 Mac OS X 10.9		2013-10-22 [APL]
    690 OpenBSD 5.4		2013-11-01 [OBD]
    691 DragonFly 3.6.0 	2013-11-25 [DFB]
    692 FreeBSD 10.0		2014-01-20 [FBD]
    693 NetBSD 5.1.4		2014-01-25 [NBD]
    694 NetBSD 5.2.2		2014-01-25 [NBD]
    695 NetBSD 6.0.4		2014-01-25 [NBD]
    696 NetBSD 6.1.3		2014-01-25 [NBD]
    697 DragonFly 3.6.1 	2014-02-22 [DFB]
    698 DragonFly 3.6.2		2014-04-10 [DFB]
    699 NetBSD 6.0.5		2014-04-12 [NBD]
    700 NetBSD 6.1.4		2014-04-12 [NBD]
    701 OpenBSD 5.5		2014-05-01 [OBD]
    702 DragonFly 3.8.0		2014-06-04 [DFB]
    703 DragonFly 3.8.1		2014-06-16 [DFB]
    704 DragonFly 3.6.3		2014-06-17 [DFB]
    705 FreeBSD 9.3		2014-07-05 [FBD]
    706 DragonFly 3.8.2		2014-08-08 [DFB]
    707 NetBSD 6.0.6		2014-09-22 [NBD]
    708 NetBSD 6.1.5		2014-09-22 [NBD]
    709 Mac OS X 10.10		2014-10-16 [APL]
    710 OpenBSD 5.6		2014-11-01 [OBD]
    711 FreeBSD 10.1		2014-11-14 [FBD]
    712 DragonFly 4.0.1		2014-11-25 [DFB]
    713 DragonFly 4.0.2		2015-01-07 [DFB]
    714 DragonFly 4.0.3		2015-01-21 [DFB]
    715 DragonFly 4.0.4		2015-03-09 [DFB]
    716 DragonFly 4.0.5		2015-03-23 [DFB]
    717 OpenBSD 5.7		2015-05-01 [OBD]
    718 DragonFly 4.2.0		2015-06-29 [DFB]
    719 FreeBSD 10.2            2015-08-13 [FBD]
    720 NetBSD 7.0		2015-09-25 [NBD]
    721 OS X 10.11		2015-09-30 [APL]
    722 OpenBSD 5.8		2015-10-18 [OBD]
    723 DragonFly 4.4.1		2015-12-07 [DFB]
    724 OpenBSD 5.9		2016-03-29 [OBD]
    725 FreeBSD 10.3		2016-04-04 [FBD]
    726 NetBSD 7.0.1		2016-05-22 [NBD]
    727 DragonFly 4.6.0		2016-08-02 [DFB]
    728 OpenBSD 6.0		2016-09-01 [OBD]
    729 macOS 10.12		2016-09-20 [APL]
    730 FreeBSD 11.0		2016-10-10 [FBD]
    731 NetBSD 7.0.2		2016-10-21 [NBD]
    732 NetBSD 7.1		2017-03-11 [NBD]
    733 DragonFly 4.8.0		2017-03-27 [DFB]
    734 OpenBSD 6.1		2017-04-11 [OBD]
    735 FreeBSD 11.1		2017-07-26 [FBD]
    736 macOS 10.13		2017-09-25 [APL]
    737 FreeBSD 10.4		2017-10-03 [FBD]
    738 OpenBSD 6.2		2017-10-09 [OBD]
    739 DragonFly 5.0.0		2017-10-16 [DFB]
    740 DragonFly 5.0.1		2017-11-06 [DFB]
    741 DragonFly 5.0.2		2017-12-04 [DFB]
    742 NetBSD 7.1.1		2017-12-22 [NBD]
    743 NetBSD 7.1.2		2018-03-15 [NBD]
    744 OpenBSD 6.3		2018-04-02 [OBD]
    745 DragonFly 5.2.0		2018-04-10 [DFB]
    746 
    747 Bibliography
    748 ------------------------
    749 
    750 Leffler, Samuel J., Marshall Kirk McKusick, Michael J Karels and John
    751 Quarterman. The Design and Implementation of the 4.3BSD UNIX Operating
    752 System. Reading, Mass. Addison-Wesley, 1989. ISBN 0-201-06196-1
    753 
    754 Salus, Peter H. A quarter century of UNIX. Addison-Wesley Publishing
    755 Company, Inc., 1994. ISBN 0-201-54777-5
    756 
    757 McKusick, Marshall Kirk, Keith Bostic, Michael J Karels, and John
    758 Quarterman. The Design and Implementation of the 4.4BSD Operating
    759 System. Reading, Mass. Addison-Wesley, 1996. ISBN 0-201-54979-4
    760 
    761 McKusick, Marshall Kirk, George Neville-Neil. The Design and
    762 Implementation of the FreeBSD Operating System.
    763 Addison-Wesley Professional, Published: Aug 2, 2004. ISBN 0-201-70245-2
    764 
    765 McKusick, Marshall Kirk, George Neville-Neil, Robert Watson. The
    766 Design and Implementation of the FreeBSD Operating System, 2nd Edition.
    767 Pearson Education, Inc., 2014. ISBN 0-321-96897-2
    768 
    769 Doug McIlroy. Research Unix Reader.
    770 
    771 Michael G. Brown. The Role of BSD in the Development of Unix.
    772 Presented to the Tasmanian Unix Special Interest Group of the
    773 Australian Computer Society, Hobart, August 1993.
    774 
    775 Peter H. Salus. Unix at 25. Byte Magazine, October 1994.
    776 URL: http://www.byte.com/art/9410/sec8/art3.htm
    777 
    778 Andreas Klemm, Lars Kller. If you're going to San Francisco ...
    779 Die freien BSD-Varianten von Unix. c't April 1997, page 368ff.
    780 
    781 BSD Release Announcements collection.
    782 URL: https://www.FreeBSD.org/releases/
    783 
    784 BSD Hypertext Man Pages
    785 URL: https://www.FreeBSD.org/cgi/man.cgi
    786 
    787 UNIX history graphing project
    788 URL: http://minnie.tuhs.org/Unix_History/index.html
    789 
    790 UNIX history
    791 URL: http://www.levenez.com/unix/
    792 
    793 James Howard: The BSD Family Tree
    794 URL: http://ezine.daemonnews.org/200104/bsd_family.html
    795 ("what are the differences between FreeBSD, NetBSD, and OpenBSD?")
    796 
    797 
    798 Acknowledgments
    799 ---------------
    800 
    801 Josh Gilliam for suggestions, bug fixes, and finding very old
    802 original BSD announcements from Usenet or tapes.
    803 
    804 Steven M. Schultz for providing 2.8BSD, 2.10BSD, 2.11BSD manual pages.
    805 
    806 --
    807 Copyright (c) 1997-2012 Wolfram Schneider <wosch (a] FreeBSD.ORG>
    808 URL: http://svnweb.freebsd.org/base/head/share/misc/bsd-family-tree
    809 
    810 $FreeBSD: head/share/misc/bsd-family-tree 332425 2018-04-12 07:39:24Z maxim $
    811 $NetBSD: bsd-family-tree,v 1.66 2018/04/13 14:31:35 eadler Exp $
    812