share/misc/bsd-family-tree

   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     OpenBSD 4.5                 |
 233  |             \      |      |   5.0           |                       |
 234  |             \      |      |  / | \          |                       |
 235  |              |  Mac OS X  |  | |  \         |                       |
 236  |              |    10.6    |  | |   \        |                       |
 237  |              |     |      |  | | NetBSD     |               DragonFly 2.4.0
 238  |              |     |      |  | |  5.0.1 OpenBSD 4.6                 |
 239  |              |     |      |  | |    |       |                       |
 240  *--FreeBSD     |     |      |  | |    |       |                       |
 241  |    8.0       |     |      |  | |    |       |                       |
 242  |     |     FreeBSD  |      |  | | NetBSD     |                       |
 243  |     |       7.3    |      |  | |  5.0.2     |               DragonFly 2.6.0
 244  |     |        |     |      |  | |        OpenBSD 4.7                 |
 245  |  FreeBSD     |     |      |  | |            |                       |
 246  |    8.1       |     |      |  | |            |                       |
 247  |     |        |     |      |  | |            |               DragonFly 2.8.2
 248  |     |        |     |      |  | |        OpenBSD 4.8                 |
 249  |     |        |     |      |  | *--NetBSD    |                       |
 250  |  FreeBSD  FreeBSD  |      |  |    5.1       |                       |
 251  |    8.2      7.4    |      |  |     |        |               DragonFly 2.10.1
 252  |     |              |      |  |     |    OpenBSD 4.9                 |
 253  |     `-----.     Mac OS X  |  |     |        |                       |
 254  |            \      10.7    |  |     |        |                       |
 255  |             |      |      |  |     |    OpenBSD 5.0                 |
 256  *--FreeBSD    |      |      |  |     |        |                       |
 257  |    9.0      |      |      |  |  NetBSD      |               DragonFly 3.0.1
 258  |     |    FreeBSD   |      |  |   5.1.2      |                       |
 259  |     |      8.3     |      |  |     |        |                       |
 260  |     |       |      |      |  |  NetBSD      |                       |
 261  |     |       |      |      |  |   5.1.3      |                       |
 262  |     |       |      |      |  |     |        |                       |
 263  |     |       |      |      |  |  NetBSD      |                       |
 264  |     |       |      |      |  |   5.1.4      |                       |
 265  |     |       |      |      |  |          OpenBSD 5.1                 |
 266  |     |       |   Mac OS X  |  `--------.     |                       |
 267  |     |       |     10.8    |           |     |                       |
 268  |     |       |      |      *--NetBSD   |     |                       |
 269  |     |       |      |      |    6.0    |     |                       |
 270  |     |       |      |      |    | |    | OpenBSD 5.2         DragonFly 3.2.1
 271  |  FreeBSD    |      |      |    | | NetBSD   |                       |
 272  |    9.1      |      |      |    | |   5.2    |                       |
 273  |     |       |      |      |    | |    |     |                       |
 274  |     |       |      |      |    | | NetBSD   |                       |
 275  |     |       |      |      |    | |  5.2.1   |                       |
 276  |     |       |      |      |    | |    |     |                       |
 277  |     |       |      |      |    | | NetBSD   |                       |
 278  |     |       |      |      |    | |  5.2.2   |                       |
 279  |     |       |      |      |    | |          |                       |
 280  |     |       |      |      |    |  \         |                       |
 281  |     |       |      |      |    |   NetBSD   |                       |
 282  |     |       |      |      |    |    6.0.1   |                       |
 283  |     |       |      |      |    |      | OpenBSD 5.3         DragonFly 3.4.1
 284  |     |       |      |      |    |   NetBSD   |                       |
 285  |     |       |      |      |    |    6.0.2   |                       |
 286  |     |       |      |      |    |      |     |                       |
 287  |     |       |      |      |    |   NetBSD   |                       |
 288  |     |       |      |      |    |    6.0.3   |                       |
 289  |     |       |      |      |    |      |     |                       |
 290  |     |       |      |      |    |   NetBSD   |                       |
 291  |     |       |      |      |    |    6.0.4   |                       |
 292  |     |       |      |      |    |      |     |                       |
 293  |     |       |      |      |    |   NetBSD   |                       |
 294  |     |       |      |      |    |    6.0.5   |                       |
 295  |     |       |      |      |    |      |     |                       |
 296  |     |       |      |      |    |   NetBSD   |                       |
 297  |     |       |      |      |    |    6.0.6   |                       |
 298  |     |       |      |      |    |            |                       |
 299  |     |       |      |      |    *--NetBSD    |                       |
 300  |     |       |      |      |         6.1     |                       |
 301  |     |    FreeBSD   |      |          |      |                       |
 302  |     |      8.4     |      |       NetBSD    |                       |
 303  |     |       |      |      |        6.1.1    |                       |
 304  |     |              |      |          |      |                       |
 305  |  FreeBSD           |      |       NetBSD    |                       |
 306  |    9.2             |      |        6.1.2    |                       |
 307  |     |           Mac OS X  |          |      |                       |
 308  |     |             10.9    |          |  OpenBSD 5.4                 |
 309  |     `-----.        |      |          |      |               DragonFly 3.6.0
 310  |            \       |      |          |      |                       |
 311  *--FreeBSD    |      |      |       NetBSD    |                       |
 312  |   10.0      |      |      |        6.1.3    |                       |
 313  |     |       |      |      |          |      |                       |
 314  |     |       |      |      |          |      |               DragonFly 3.6.1
 315  |     |       |      |      |          |      |                       |
 316  |     |       |      |      |          |      |                       |
 317  |     |       |      |      |          |      |               DragonFly 3.6.2
 318  |     |       |      |      |       NetBSD    |                       |
 319  |     |       |      |      |        6.1.4    |                       |
 320  |     |       |      |      |          |      |                       |
 321  |     |       |      |      |          |  OpenBSD 5.5                 |
 322  |     |       |      |      |          |      |                       |
 323  |     |       |      |      |          |      |               DragonFly 3.8.0
 324  |     |       |      |      |          |      |                       |
 325  |     |       |      |      |          |      |                       |
 326  |     |       |      |      |          |      |               DragonFly 3.8.1
 327  |     |       |      |      |          |      |                       |
 328  |     |       |      |      |          |      |                       |
 329  |     |       |      |      |          |      |               DragonFly 3.6.3
 330  |     |       |      |      |          |      |                       |
 331  |     |    FreeBSD   |      |          |      |                       |
 332  |     |      9.3     |      |          |      |                       |
 333  |     |              |      |       NetBSD    |               DragonFly 3.8.2
 334  |     |              |      |        6.1.5    |                       |
 335  |     |           Mac OS X  |                 |                       |
 336  |     |             10.10   |                 |                       |
 337  |     |              |      |             OpenBSD 5.6                 |
 338  |  FreeBSD           |      |                 |                       |
 339  |   10.1             |      |                 |               DragonFly 4.0.1
 340  |     |              |      |                 |                       |
 341  |     |              |      |                 |               DragonFly 4.0.2
 342  |     |              |      |                 |                       |
 343  |     |              |      |                 |               DragonFly 4.0.3
 344  |     |              |      |                 |                       |
 345  |     |              |      |                 |               DragonFly 4.0.4
 346  |     |              |      |                 |                       |
 347  |     |              |      |                 |               DragonFly 4.0.5
 348  |     |              |      |                 |                       |
 349  |     |              |      |             OpenBSD 5.7                 |
 350  |     |              |      |                 |               DragonFly 4.2.0
 351  |  FreeBSD           |      |                 |                       |
 352  |   10.2             |      |                 |                       |
 353  |     |            macOS    *--NetBSD 7.0     |                       |
 354  |     |            10.11    |   | |       OpenBSD 5.8                 |
 355  |     |              |      |   | `--.        |               DragonFly 4.4.1
 356  |  FreeBSD           |      |   |    |    OpenBSD 5.9                 |
 357  |   10.3             |      |   |    |        |                       |
 358  |     |              |      |   | NetBSD      |                       |
 359  |     |              |      |   |  7.0.1      |                       |
 360  |     `------.       |      |   |    |        |               DragonFly 4.6.0
 361  |            |       |      |   |    |        |                       |
 362  |            |       |      |   |    |        |                       |
 363  *--FreeBSD   |     macOS    |   |    |    OpenBSD 6.0                 |
 364  |   11.0     |     10.12    |   | NetBSD      |                       |
 365  |     |      |       |      |   |  7.0.2      |                       |
 366  |     |      |       |      |   |             |                       |
 367  |     |      |       |      |   *--NetBSD     |                       |
 368  |     |      |       |      |   |   7.1       |                       |
 369  |     |      |       |      |   |    |        |                       |
 370  |     |      |       |      |   |    |        |                       |
 371  |     |      |     macOS    |   |    |        |               DragonFly 4.8.0
 372  |     |      |     10.13    |   |    |    OpenBSD 6.1                 |
 373  |  FreeBSD   |       |      |   |    |        |               DragonFly 5.0.0
 374  |   11.1  FreeBSD    |      |   |    |        |                       |
 375  |     |    10.4      |      |   |    |    OpenBSD 6.2         DragonFly 5.0.1
 376  |     |              |      |   |    |        |                       |
 377  |     `------.       |      |   | NetBSD      |               DragonFly 5.0.2
 378  |            |       |      |   |  7.1.1      |                       |
 379  |            |       |      |   |    |        |                       |
 380  |            |       |      |   | NetBSD      |                       |
 381  |            |       |      |   |  7.1.2      `--.                    |
 382  |            |       |      |   |                |                    |
 383  |            |       |      |   `-----.      OpenBSD 6.3              |
 384  |            |       |      *--NetBSD |          |            DragonFly 5.2.0
 385  |            |       |      |   8.0   |          |                    |
 386  |            |       |      |   |     |          |            DragonFly 5.2.1
 387  |            |       |      |   |     |          |                    |
 388  |            |       |      |   |     |          |            DragonFly 5.2.2
 389  |         FreeBSD    |      |   |     *--NetBSD  |                    |
 390  |           11.2     |      |   |         7.2    |                    |
 391  |            |     macOS    |   |                |                    |
 392  |            |     10.14    |   |            OpenBSD 6.4              |
 393  |            |       |      |   |                |                    |
 394  |            |       |      |   |                |            DragonFly 5.4.0
 395  *--FreeBSD   |       |      |   |                |                    |
 396  |   12.0     |       |      |   |                |            DragonFly 5.4.1
 397  |     |      |       |      |   |            OpenBSD 6.5              |
 398  |     |      |       |      |   |                |                    |
 399  |     |      |       |      |  NetBSD            |                    |
 400  |     |      |       |      |   8.1              |            DragonFly 5.6
 401  |     |      |       |      |   |                |                    |
 402  |     |      |       |      |   |                |            DragonFly 5.6.1
 403  |     |   FreeBSD  macOS    |   |                |                    |
 404  |     |     11.3   10.15    |   |                |                    |
 405  |  FreeBSD   |       |      |   |            OpenBSD 6.6              |
 406  |   12.1     |     macOS    |   `-------.        |                    |
 407  |     |      |    10.15.1   |           |        |            DragonFly 5.6.2
 408  |     |      |       |      *--NetBSD   |        |                    |
 409  |     |      |       |      |   9.0     |        |                    |
 410  |     |      |       |      |    |      |        |                    |
 411  |     |      |       |      |    |      |        |            DragonFly 5.8
 412  |     |      |       |      |    |      |        |                    |
 413  |     |      |       |      |    |      |        |            DragonFly 5.6.3
 414  |     |      |       |      |    |    NetBSD     |                    |
 415  |     |      |       |      |    |     8.2       |                    |
 416  |     |      |       |      |    |               |            DragonFly 5.8.1
 417  |     |      |       |      |    |           OpenBSD 6.7              |
 418  |     |   FreeBSD    |      |    |               |                    |
 419  |     |     11.4     |      |    |               |                    |
 420  |     |              |      |    |               |            DragonFly 5.8.2
 421  |     |              |      |    |               |            DragonFly 5.8.3
 422  |     |              |      |  NetBSD 9.1    OpenBSD 6.8              |
 423  |  FreeBSD         macOS    |    |               |                    |
 424  |   12.2            11      |    |               |                    |
 425  |     |              |      |    |               |                    |
 426  |     `------.       |      |    |               |                    |
 427  |            |       |      |    |               |                    |
 428  *--FreeBSD   |       |      |    |               |                    |
 429  |   13.0     |       |      |  NetBSD 9.2    OpenBSD 6.9      DragonFly 6.0.0
 430  |     |      |       |      |    |               |                    |
 431  |     |      |       |      |    |               |            DragonFly 6.0.1
 432  |     |      |       |      |    |               |                    |
 433  |     |   FreeBSD  macOS    |    |           OpenBSD 7.0              |
 434  |     |     12.3    12      |    |               |                    |
 435  |     |      |       |      |    |               |            DragonFly 6.2.1
 436  |     |      |       |      |    |           OpenBSD 7.1              |
 437  |  FreeBSD   |       |      |    |               |                    |
 438  |   13.1     |       |      |    |               |                    |
 439  |     |      |       |      |    |               |            DragonFly 6.2.2
 440  |     |      |       |      |  NetBSD 9.3        |                    |
 441  |     |      |     macOS    |                OpenBSD 7.2              |
 442  |     |      |      13      |                    |                    |
 443  |     |   FreeBSD    |      |                    |                    |
 444  |     |     12.4     |      |                    |                    |
 445  |     |              |      |                    |            DragonFly 6.4.0
 446  |     |              |      |                OpenBSD 7.3              |
 447  |  FreeBSD           |      |                    |                    |
 448  |   13.2             |      |                    |                    |
 449  |                  macOS    |                    |                    |
 450  |                   14      |                    |                    |
 451  |                    |      |                OpenBSD 7.4              |
 452  *--FreeBSD           |      |                    |                    |
 453  |   14.0             |      |                    |                    |
 454  |                    |      |                    |                    |
 455 FreeBSD 15 -current   |  NetBSD -current   OpenBSD -current    DragonFly -current
 456  |                    |      |                    |                    |
 457  v                    v      v                    v                    v
 458
 459 Time
 460 ----------------
 461
 462 Time tolerance +/- 6 months, depending on which book/article you read; if it
 463 was the announcement in Usenet or if it was available as tape.
 464
 465 [44B] McKusick, Marshall Kirk, Keith Bostic, Michael J Karels,
 466         and John Quarterman. The Design and Implementation of
 467         the 4.4BSD Operating System.
 468 [APL] Apple website [https://www.apple.com/macosx/]
 469 [BSDI] Berkeley Software Design, Inc.
 470 [DFB] DragonFlyBSD Project, The.
 471 [DOC] README, COPYRIGHT on tape.
 472 [FBD] FreeBSD Project, The.
 473 [KB]  Keith Bostic. BSD2.10 available from Usenix. comp.unix.sources,
 474         Volume 11, Info 4, April, 1987.
 475 [KKK] Mike Karels, Kirk McKusick, and Keith Bostic. tahoe announcement.
 476         comp.bugs.4bsd.ucb-fixes, June 15, 1988.
 477 [KSJ] Michael J. Karels, Carl F. Smith, and William F. Jolitz.
 478         Changes in the Kernel in 2.9BSD. Second Berkeley Software
 479         Distribution UNIX Version 2.9, July, 1983.
 480 [NBD] NetBSD Project, The.
 481 [OBD] OpenBSD Project, The.
 482 [QCU] Salus, Peter H. A quarter century of UNIX.
 483 [SMS] Steven M. Schultz. 2.11BSD, UNIX for the PDP-11.
 484 [TUHS] The Unix Historical Society.  https://minnie.tuhs.org/Unix_History/.
 485 [USE] Usenet announcement.
 486 [WRS] Wind River Systems, Inc.
 487 [dmr] Dennis Ritchie, via E-Mail
 488
 489 Multics                 1965
 490 UNIX                    Summer 1969
 491                                 DEC PDP-7
 492 First   Edition         1971-11-03 [QCU]
 493                                 DEC PDP-11/20, Assembler
 494 Second  Edition         1972-06-12 [QCU]
 495                                 10 UNIX installations
 496 Third   Edition         1973-02-xx [QCU]
 497                                 Pipes, 16 installations
 498 Fourth  Edition         1973-11-xx [QCU]
 499                                 rewriting in C effected,
 500                                 above 30 installations
 501 Fifth   Edition         1974-06-xx [QCU]
 502                                 above 50 installations
 503 Sixth   Edition         1975-05-xx [QCU]
 504                                 port to DEC Vax
 505 Seventh Edition         1979-01-xx [QCU] 1979-01-10 [TUHS]
 506                                 first portable UNIX
 507 Eighth  Edition         1985-02-xx [QCU]
 508                                 VAX 11/750, VAX 11/780 [dmr]
 509                                 descended from 4.1c BSD [dmr]
 510                                 descended from 4.1 BSD [44B]
 511                         scooping-out and replacement of the character-device
 512                         and networking part by the streams mechanism
 513
 514 Ninth   Edition         1986-09-xx [QCU]
 515 Tenth   Edition         1989-10-xx [QCU]
 516
 517 1BSD                    late 1977
 518                         1978-01-16 [DOC]
 519                         1978-03-09 [QCU]
 520                                 PDP-11, Pascal, ex(1)
 521                                 30 free copies of 1BSD sent out
 522                                 35 tapes sold for 50 USD [QCU]
 523 2BSD                    mid 1978 [QCU] 1979-05-10 [TUHS]
 524                                 75 2BSD tapes shipped
 525 2.79BSD                 1980-04-xx [TUHS]
 526 2.8BSD                  1981-07-xx [KSJ]
 527                                 First 2BSD with bootable V7 kernel plus
 528                                 community fixes.
 529 2.8.1BSD                1982-01-xx [QCU]
 530                                 set of performance improvements
 531 2.9BSD                  1983-07-xx [KSJ]
 532 2.9.1BSD                1983-11-xx [TUHS]
 533 2.9BSD-Seismo           1985-08-xx [SMS]
 534 2.10BSD                 1987-04-xx [KKK]
 535 2.10.1BSD               1989-01-xx [SMS]
 536 2.11BSD                 1991-03-14 [SMS]
 537 2.11BSD rev #430        1999-12-13 [SMS]
 538
 539 32V                     1978-1[01]-xx [QCU] 1979-03-26 [TUHS]
 540 3BSD                    late 1979 [QCU] March 1980 [TUHS]
 541                                 virtual memory, page replacement,
 542                                 demand paging
 543 4.0BSD                  1980-10-xx
 544 4.1BSD                  1981-07-08 [DOC]
 545 4.1aBSD                 1982-04-xx
 546                                 alpha release, 100 sites, networking [44B]
 547 4.1bBSD                         internal release, fast filesystem [44B]
 548 4.1cBSD                 late 1982
 549                                 beta release, IPC [44B]
 550 4.2BSD                  1983-09-xx [QCU]
 551                         1983-08-03 [DOC]
 552 4.3BSD                  1986-06-xx [QCU]
 553                         1986-04-05 [KB], [DOC]
 554 4.3BSD Tahoe            1988-06-15 [QCU], [DOC]
 555 4.3BSD NET/1            1988-11-xx [QCU]
 556                         1989-01-01 [DOC]
 557 4.3BSD Reno             1990-06-29 [QCU], [DOC]
 558 4.3BSD NET/2            1991-06-28 [QCU], [DOC]
 559
 560 BSD/386 ALPHA           1991-12-xx [BSDI]
 561                                 first code released to people outside BSDI
 562 386BSD 0.0              1992-02-xx [DOC]
 563 BSD/386 0.3.1           1992-04-xx [BSDI] first ext. beta; B customers
 564 BSD/386 0.3.3           1992-06-xx [BSDI] first CDROM version
 565 386BSD 0.1              1992-07-28 [DOC]
 566 4.4BSD Alpha            1992-07-07
 567 BSD/386 0.9.3           1992-10-xx [BSDI]
 568                                 first external gamma; G customers
 569 BSD/386 0.9.4           1992-12-xx [BSDI]
 570                                 would have been 1.0 except for request
 571                                 for preliminary injunction
 572 BSD/386 1.0             1993-03-xx [BSDI]
 573                                 injunction denied; first official release
 574 NetBSD 0.8              1993-04-20 [NBD]
 575 4.4BSD                  1993-06-01 [USE]
 576 NetBSD 0.9              1993-08-23 [NBD]
 577 FreeBSD 1.0             1993-11-01 [FBD]
 578 FreeBSD 1.0.2           1993-11-14 [FBD]
 579                                 supersedes 1.0 13 days after release.
 580 BSD/386 1.1             1994-02-xx [BSDI]
 581 4.4BSD Lite             1994-03-01 [USE]
 582 FreeBSD 1.1             1994-05-07 [FBD]
 583 FreeBSD 1.1.5           1994-06-30 [FBD]
 584 FreeBSD 1.1.5.1         1994-07-05 [FBD]
 585                                 supersedes 1.1.5 5 days after release.
 586 NetBSD 1.0              1994-10-26 [NBD]
 587 386BSD 1.0              1994-11-12 [USE]
 588 FreeBSD 2.0             1994-11-23 [FBD]
 589 BSD/OS 2.0              1995-01-xx [BSDI] 4.4 lite based
 590 FreeBSD 2.0.5           1995-06-10 [FBD]
 591 BSD/OS 2.0.1            1995-06-xx [BSDI]
 592 4.4BSD Lite Release 2   1995-06-xx [44B]
 593                                 the true final distribution from the CSRG
 594 FreeBSD 2.1.0           1995-11-19 [FBD]
 595 NetBSD 1.1              1995-11-26 [NBD]
 596 BSD/OS 2.1              1996-01-xx [BSDI]
 597 FreeBSD 2.1.5           1996-07-14 [FBD]
 598 NetBSD 1.2              1996-10-04 [NBD]
 599 OpenBSD 2.0             1996-10-18 [OBD]
 600 FreeBSD 2.1.6           1996-11-16 [FBD]
 601 FreeBSD 2.1.6.1         1996-11-25 [FBD] (sendmail security release)
 602 Rhapsody                1997-xx-xx
 603 FreeBSD 2.1.7           1997-02-20 [FBD]
 604 BSD/OS 3.0              1997-02-xx [BSDI] 4.4 lite2 based
 605 FreeBSD 2.2.0           1997-03-16 [FBD]
 606 FreeBSD 2.2.1           1997-03-25 [FBD]
 607 FreeBSD 2.2.2           1997-05-16 [FBD]
 608 NetBSD 1.2.1            1997-05-20 [NBD] (patch release)
 609 OpenBSD 2.1             1997-06-01 [OBD]
 610 FreeBSD 2.2.5           1997-10-22 [FBD]
 611 OpenBSD 2.2             1997-12-01 [OBD]
 612 NetBSD 1.3              1998-01-04 [NBD]
 613 FreeBSD 2.2.6           1998-03-25 [FBD]
 614 NetBSD 1.3.1            1998-03-09 [NBD] (patch release)
 615 BSD/OS 3.1              1998-03-xx [BSDI]
 616 OpenBSD 2.3             1998-05-19 [OBD]
 617 NetBSD 1.3.2            1998-05-29 [NBD] (patch release)
 618 FreeBSD 2.2.7           1998-07-22 [FBD]
 619 BSD/OS 4.0              1998-08-xx [BSDI]
 620                                 2-lock MP support, ELF executables
 621 FreeBSD 3.0             1998-10-16 [FBD]
 622                                 FreeBSD-3.0 is a snapshot from -current,
 623                                 while 3.1 and 3.2 are from 3.x-stable which
 624                                 was branched quite some time after 3.0-release
 625 FreeBSD 2.2.8           1998-11-29 [FBD]
 626 OpenBSD 2.4             1998-12-01 [OBD]
 627 NetBSD 1.3.3            1998-12-23 [NBD] (patch release)
 628 FreeBSD 3.1             1999-02-15 [FBD]
 629 BSD/OS 4.0.1            1999-03-xx [BSDI]
 630 NetBSD 1.4              1999-05-12 [NBD]
 631 FreeBSD 3.2             1999-05-17 [FBD]
 632 OpenBSD 2.5             1999-05-19 [OBD]
 633 NetBSD 1.4.1            1999-08-26 [NBD] (patch release)
 634 FreeBSD 3.3             1999-09-17 [FBD]
 635 OpenBSD 2.6             1999-12-01 [OBD]
 636 FreeBSD 3.4             1999-12-20 [FBD]
 637 BSD/OS 4.1              1999-12-xx [BSDI]
 638 FreeBSD 4.0             2000-03-13 [FBD]
 639 NetBSD 1.4.2            2000-03-19 [NBD] (patch release)
 640 OpenBSD 2.7             2000-06-15 [OBD]
 641 FreeBSD 3.5             2000-06-24 [FBD]
 642 FreeBSD 4.1             2000-07-27 [FBD]
 643 FreeBSD 3.5.1           2000-07-28 [FBD]
 644 FreeBSD 4.1.1           2000-09-25 [FBD] (a network-only patch release)
 645 FreeBSD 4.2             2000-11-21 [FBD]
 646 NetBSD 1.4.3            2000-11-25 [NBD] (patch release)
 647 BSD/OS 4.2              2000-11-29 [BSDI]
 648 OpenBSD 2.8             2000-12-01 [OBD]
 649 NetBSD 1.5              2000-12-06 [NBD]
 650 Mac OS X 10.0           2001-03-24 [APL]
 651 FreeBSD 4.3             2001-04-20 [FBD]
 652 OpenBSD 2.9             2001-06-01 [OBD]
 653 NetBSD 1.5.1            2001-07-11 [NBD] (patch release)
 654 NetBSD 1.5.2            2001-09-13 [NBD] (patch release)
 655 FreeBSD 4.4             2001-09-18 [FBD]
 656 Mac OS X 10.1           2001-09-29 [APL]
 657 OpenBSD 3.0             2001-12-01 [OBD]
 658 FreeBSD 4.5             2002-01-29 [FBD]
 659 BSD/OS 4.3              2002-03-14 [WRS]
 660 OpenBSD 3.1             2002-05-19 [OBD]
 661 FreeBSD 4.6             2002-06-15 [FBD]
 662 NetBSD 1.5.3            2002-07-22 [NBD] (patch release)
 663 FreeBSD 4.6.2           2002-08-15 [FBD] (patch release)
 664 Mac OS X 10.2           2002-08-23 [APL]
 665 NetBSD 1.6              2002-09-14 [NBD]
 666 FreeBSD 4.7             2002-10-08 [FBD]
 667 OpenBSD 3.2             2002-11-01 [OBD]
 668 FreeBSD 5.0             2003-01-17 [FBD]
 669                                 FreeBSD 5.0 is a separate branch off of
 670                                 -current, similar to 3.0.
 671 FreeBSD 4.8             2003-04-03 [FBD]
 672 NetBSD 1.6.1            2003-04-21 [NBD] (patch release)
 673 OpenBSD 3.3             2003-05-01 [OBD]
 674 BSD/OS 5.0              2003-05-?? [WRS]
 675 FreeBSD 5.1             2003-06-09 [FBD]
 676 Mac OS X 10.3           2003-10-24 [APL]
 677 FreeBSD 4.9             2003-10-28 [FBD]
 678 BSD/OS 5.1 ISE          2003-10-?? [WRS] (final version)
 679 OpenBSD 3.4             2003-11-01 [OBD]
 680 FreeBSD 5.2             2004-01-12 [FBD]
 681 FreeBSD 5.2.1           2004-02-22 [FBD] (patch release)
 682 NetBSD 1.6.2            2004-03-01 [NBD] (patch release)
 683 OpenBSD 3.5             2004-04-01 [OBD]
 684 FreeBSD 4.10            2004-05-27 [FBD]
 685 DragonFly 1.0           2004-07-12 [DFB]
 686 OpenBSD 3.6             2004-10-29 [OBD]
 687 FreeBSD 5.3             2004-11-06 [FBD]
 688 NetBSD 2.0              2004-12-09 [NBD]
 689 FreeBSD 4.11            2005-01-25 [FBD]
 690 DragonFly 1.2.0         2005-04-08 [DFB]
 691 NetBSD 2.0.2            2005-04-14 [NBD] (security/critical release)
 692 Mac OS X 10.4           2005-04-29 [APL]
 693 FreeBSD 5.4             2005-05-09 [FBD]
 694 OpenBSD 3.7             2005-05-19 [OBD]
 695 NetBSD 2.0.3            2005-10-31 [NBD] (security/critical release)
 696 OpenBSD 3.8             2005-11-01 [OBD]
 697 FreeBSD 6.0             2005-11-01 [FBD]
 698 NetBSD 2.1              2005-11-02 [NBD]
 699 NetBSD 3.0              2005-12-23 [NBD]
 700 DragonFly 1.4.0         2006-01-08 [DFB]
 701 FreeBSD 2.2.9           2006-04-01 [FBD]
 702 OpenBSD 3.9             2006-05-01 [OBD]
 703 FreeBSD 6.1             2006-05-08 [FBD]
 704 FreeBSD 5.5             2006-05-25 [FBD]
 705 NetBSD 3.0.1            2006-07-24 [NBD] (security/critical release)
 706 DragonFly 1.6.0         2006-07-24 [DFB]
 707 OpenBSD 4.0             2006-11-01 [OBD]
 708 NetBSD 3.0.2            2006-11-04 [NBD] (security/critical release)
 709 NetBSD 3.1              2006-11-04 [NBD]
 710 FreeBSD 6.2             2007-01-15 [FBD]
 711 DragonFly 1.8.0         2007-01-30 [DFB]
 712 OpenBSD 4.1             2007-05-01 [OBD]
 713 DragonFly 1.10.0        2007-08-06 [DFB]
 714 Mac OS X 10.5           2007-10-26 [APL]
 715 OpenBSD 4.2             2007-11-01 [OBD]
 716 NetBSD 4.0              2007-12-19 [NBD]
 717 FreeBSD 6.3             2008-01-18 [FBD]
 718 DragonFly 1.12.0        2008-02-26 [DFB]
 719 FreeBSD 7.0             2008-02-27 [FBD]
 720 OpenBSD 4.3             2008-05-01 [OBD]
 721 DragonFly 2.0.0         2008-07-21 [DFB]
 722 OpenBSD 4.4             2008-11-01 [OBD]
 723 FreeBSD 6.4             2008-11-28 [FBD]
 724 FreeBSD 7.1             2009-01-04 [FBD]
 725 DragonFly 2.2.0         2009-02-17 [DFB]
 726 NetBSD 5.0              2009-04-29 [NBD]
 727 OpenBSD 4.5             2009-05-01 [OBD]
 728 FreeBSD 7.2             2009-05-04 [FBD]
 729 Mac OS X 10.6           2009-06-08 [APL]
 730 NetBSD 5.0.1            2009-08-02 [NBD] (security/critical release)
 731 DragonFly 2.4.0         2009-09-16 [DFB]
 732 OpenBSD 4.6             2009-10-18 [OBD]
 733 FreeBSD 8.0             2009-11-26 [FBD]
 734 NetBSD 5.0.2            2010-02-12 [NBD] (security/critical release)
 735 FreeBSD 7.3             2010-03-23 [FBD]
 736 DragonFly 2.6.0         2010-03-28 [DFB]
 737 OpenBSD 4.7             2010-05-19 [OBD]
 738 FreeBSD 8.1             2010-07-24 [FBD]
 739 DragonFly 2.8.2         2010-10-30 [DFB]
 740 OpenBSD 4.8             2010-11-01 [OBD]
 741 NetBSD 5.1              2010-11-19 [NBD]
 742 FreeBSD 7.4             2011-02-24 [FBD]
 743 FreeBSD 8.2             2011-02-24 [FBD]
 744 DragonFly 2.10.1        2011-04-26 [DFB]
 745 OpenBSD 4.9             2011-05-01 [OBD]
 746 Mac OS X 10.7           2011-07-20 [APL]
 747 OpenBSD 5.0             2011-11-01 [OBD]
 748 FreeBSD 9.0             2012-01-12 [FBD]
 749 NetBSD 5.1.2            2012-02-02 [NBD] (security/critical release)
 750 DragonFly 3.0.1         2012-02-21 [DFB]
 751 FreeBSD 8.3             2012-04-18 [FBD]
 752 OpenBSD 5.1             2012-05-01 [OBD]
 753 Mac OS X 10.8           2012-07-25 [APL]
 754 NetBSD 6.0              2012-10-17 [NBD]
 755 OpenBSD 5.2             2012-11-01 [OBD]
 756 DragonFly 3.2.1         2012-11-02 [DFB]
 757 NetBSD 5.2              2012-12-03 [NBD]
 758 NetBSD 6.0.1            2012-12-26 [NBD] (security/critical release)
 759 FreeBSD 9.1             2012-12-30 [FBD]
 760 DragonFly 3.4.1         2013-04-29 [DFB]
 761 OpenBSD 5.3             2013-05-01 [OBD]
 762 NetBSD 6.0.2            2013-05-18 [NBD] (security/critical release)
 763 NetBSD 6.1              2013-05-18 [NBD]
 764 FreeBSD 8.4             2013-06-07 [FBD]
 765 NetBSD 6.1.1            2013-08-22 [NBD]
 766 NetBSD 5.1.3            2013-09-29 [NBD]
 767 NetBSD 5.2.1            2013-09-29 [NBD]
 768 FreeBSD 9.2             2013-09-30 [FBD]
 769 NetBSD 6.0.3            2013-09-30 [NBD]
 770 NetBSD 6.1.2            2013-09-30 [NBD]
 771 Mac OS X 10.9           2013-10-22 [APL]
 772 OpenBSD 5.4             2013-11-01 [OBD]
 773 DragonFly 3.6.0         2013-11-25 [DFB]
 774 FreeBSD 10.0            2014-01-20 [FBD]
 775 NetBSD 5.1.4            2014-01-25 [NBD]
 776 NetBSD 5.2.2            2014-01-25 [NBD]
 777 NetBSD 6.0.4            2014-01-25 [NBD]
 778 NetBSD 6.1.3            2014-01-25 [NBD]
 779 DragonFly 3.6.1         2014-02-22 [DFB]
 780 DragonFly 3.6.2         2014-04-10 [DFB]
 781 NetBSD 6.0.5            2014-04-12 [NBD]
 782 NetBSD 6.1.4            2014-04-12 [NBD]
 783 OpenBSD 5.5             2014-05-01 [OBD]
 784 DragonFly 3.8.0         2014-06-04 [DFB]
 785 DragonFly 3.8.1         2014-06-16 [DFB]
 786 DragonFly 3.6.3         2014-06-17 [DFB]
 787 FreeBSD 9.3             2014-07-05 [FBD]
 788 DragonFly 3.8.2         2014-08-08 [DFB]
 789 NetBSD 6.0.6            2014-09-22 [NBD]
 790 NetBSD 6.1.5            2014-09-22 [NBD]
 791 Mac OS X 10.10          2014-10-16 [APL]
 792 OpenBSD 5.6             2014-11-01 [OBD]
 793 FreeBSD 10.1            2014-11-14 [FBD]
 794 DragonFly 4.0.1         2014-11-25 [DFB]
 795 DragonFly 4.0.2         2015-01-07 [DFB]
 796 DragonFly 4.0.3         2015-01-21 [DFB]
 797 DragonFly 4.0.4         2015-03-09 [DFB]
 798 DragonFly 4.0.5         2015-03-23 [DFB]
 799 OpenBSD 5.7             2015-05-01 [OBD]
 800 DragonFly 4.2.0         2015-06-29 [DFB]
 801 FreeBSD 10.2            2015-08-13 [FBD]
 802 NetBSD 7.0              2015-09-25 [NBD]
 803 OS X 10.11              2015-09-30 [APL]
 804 OpenBSD 5.8             2015-10-18 [OBD]
 805 DragonFly 4.4.1         2015-12-07 [DFB]
 806 OpenBSD 5.9             2016-03-29 [OBD]
 807 FreeBSD 10.3            2016-04-04 [FBD]
 808 NetBSD 7.0.1            2016-05-22 [NBD]
 809 DragonFly 4.6.0         2016-08-02 [DFB]
 810 OpenBSD 6.0             2016-09-01 [OBD]
 811 macOS 10.12             2016-09-20 [APL]
 812 FreeBSD 11.0            2016-10-10 [FBD]
 813 NetBSD 7.0.2            2016-10-21 [NBD]
 814 NetBSD 7.1              2017-03-11 [NBD]
 815 DragonFly 4.8.0         2017-03-27 [DFB]
 816 OpenBSD 6.1             2017-04-11 [OBD]
 817 FreeBSD 11.1            2017-07-26 [FBD]
 818 macOS 10.13             2017-09-25 [APL]
 819 FreeBSD 10.4            2017-10-03 [FBD]
 820 OpenBSD 6.2             2017-10-09 [OBD]
 821 DragonFly 5.0.0         2017-10-16 [DFB]
 822 DragonFly 5.0.1         2017-11-06 [DFB]
 823 DragonFly 5.0.2         2017-12-04 [DFB]
 824 NetBSD 7.1.1            2017-12-22 [NBD]
 825 NetBSD 7.1.2            2018-03-15 [NBD]
 826 OpenBSD 6.3             2018-04-02 [OBD]
 827 DragonFly 5.2.0         2018-04-10 [DFB]
 828 DragonFly 5.2.1         2018-05-20 [DFB]
 829 DragonFly 5.2.2         2018-06-18 [DFB]
 830 FreeBSD 11.2            2018-06-27 [FBD]
 831 NetBSD 8.0              2018-07-17 [NBD]
 832 NetBSD 7.2              2018-08-29 [NBD]
 833 macOS 10.14             2018-09-24 [APL]
 834 OpenBSD 6.4             2018-10-18 [OBD]
 835 DragonFly 5.4.0         2018-12-03 [DFB]
 836 FreeBSD 12.0            2018-12-11 [FBD]
 837 DragonFly 5.4.1         2018-12-24 [DFB]
 838 OpenBSD 6.5             2019-05-01 [OBD]
 839 NetBSD 8.1              2019-06-04 [NBD]
 840 DragonFly 5.6           2019-06-17 [DFB]
 841 DragonFly 5.6.1         2019-06-19 [DFB]
 842 FreeBSD 11.3            2019-07-09 [FBD]
 843 DragonFly 5.6.2         2019-08-11 [DFB]
 844 OpenBSD 6.6             2019-10-17 [OBD]
 845 macOS 10.15             2019-10-07 [APL]
 846 macOS 10.15.1           2019-10-29 [APL] (security/critical release)
 847 FreeBSD 12.1            2019-11-04 [FBD]
 848 NetBSD 9.0              2020-02-14 [NBD]
 849 DragonFly 5.8           2020-03-03 [DFB]
 850 DragonFly 5.6.3         2020-03-11 [DFB]
 851 NetBSD 8.2              2020-03-31 [NBD]
 852 DragonFly 5.8.1         2020-05-06 [DFB]
 853 OpenBSD 6.7             2020-05-19 [OBD]
 854 FreeBSD 11.4            2020-06-16 [FBD]
 855 DragonFly 5.8.2         2020-09-23 [DFB]
 856 DragonFly 5.8.3         2020-09-24 [DFB]
 857 OpenBSD 6.8             2020-10-18 [OBD]
 858 NetBSD 9.1              2020-10-18 [NBD]
 859 FreeBSD 12.2            2020-10-27 [FBD]
 860 macOS 11                2020-11-19 [APL]
 861 FreeBSD 13.0            2021-04-13 [FBD]
 862 OpenBSD 6.9             2021-05-01 [OBD]
 863 DragonFly 6.0           2021-05-08 [DFB]
 864 NetBSD 9.2              2021-05-12 [NBD]
 865 DragonFly 6.0.1         2021-10-12 [DFB]
 866 OpenBSD 7.0             2021-10-14 [OBD]
 867 macOS 12                2021-10-25 [APL]
 868 FreeBSD 12.3            2021-12-01 [FBD]
 869 DragonFly 6.2.1         2022-01-09 [DFB]
 870 OpenBSD 7.1             2022-04-21 [OBD]
 871 FreeBSD 13.1            2022-05-17 [FBD]
 872 DragonFly 6.2.2         2022-06-09 [DFB]
 873 NetBSD 9.3              2022-08-04 [NBD]
 874 OpenBSD 7.2             2022-10-20 [OBD]
 875 macOS 13                2022-10-24 [APL]
 876 FreeBSD 12.4            2022-12-05 [FBD]
 877 DragonFly 6.4           2022-12-30 [DFB]
 878 OpenBSD 7.3             2023-04-10 [OBD]
 879 FreeBSD 13.2            2023-04-11 [FBD]
 880 macOS 14                2023-09-26 [APL]
 881 OpenBSD 7.4             2023-10-16 [OBD]
 882 FreeBSD 14.0            2023-11-20 [FBD]
 883
 884 Bibliography
 885 ------------------------
 886
 887 Leffler, Samuel J., Marshall Kirk McKusick, Michael J Karels and John
 888 Quarterman. The Design and Implementation of the 4.3BSD UNIX Operating
 889 System. Reading, Mass. Addison-Wesley, 1989. ISBN 0-201-06196-1
 890
 891 Salus, Peter H. A quarter century of UNIX. Addison-Wesley Publishing
 892 Company, Inc., 1994. ISBN 0-201-54777-5
 893
 894 McKusick, Marshall Kirk, Keith Bostic, Michael J Karels, and John
 895 Quarterman. The Design and Implementation of the 4.4BSD Operating
 896 System. Reading, Mass. Addison-Wesley, 1996. ISBN 0-201-54979-4
 897
 898 McKusick, Marshall Kirk, George Neville-Neil. The Design and
 899 Implementation of the FreeBSD Operating System.
 900 Addison-Wesley Professional, Published: Aug 2, 2004. ISBN 0-201-70245-2
 901
 902 McKusick, Marshall Kirk, George Neville-Neil, Robert Watson. The
 903 Design and Implementation of the FreeBSD Operating System, 2nd Edition.
 904 Pearson Education, Inc., 2014. ISBN 0-321-96897-2
 905
 906 Doug McIlroy. Research Unix Reader.
 907
 908 Michael G. Brown. The Role of BSD in the Development of Unix.
 909 Presented to the Tasmanian Unix Special Interest Group of the
 910 Australian Computer Society, Hobart, August 1993.
 911
 912 Peter H. Salus. Unix at 25. Byte Magazine, October 1994.
 913 URL: https://web.archive.org/web/20081230094857/http://www.byte.com/art/9410/sec8/art3.htm
 914
 915 Andreas Klemm, Lars Köller. If you're going to San Francisco ...
 916 Die freien BSD-Varianten von Unix. c't April 1997, page 368ff.
 917
 918 FreeBSD Release Information
 919 URL: https://www.FreeBSD.org/releases/
 920
 921 FreeBSD Manual Pages
 922 URL: https://man.freebsd.org/cgi/man.cgi
 923
 924 UNIX history graphing project
 925 URL: https://minnie.tuhs.org/Unix_History/index.html
 926
 927 UNIX history
 928 URL: https://www.levenez.com/unix/
 929
 930 James Howard: The BSD Family Tree
 931 URL: https://web.archive.org/web/20090427195917/http://ezine.daemonnews.org/200104/bsd_family.html
 932 ("what are the differences between FreeBSD, NetBSD, and OpenBSD?")
 933
 934
 935 Acknowledgments
 936 ---------------
 937
 938 Josh Gilliam for suggestions, bug fixes, and finding very old
 939 original BSD announcements from Usenet or tapes.
 940
 941 Steven M. Schultz for providing 2.8BSD, 2.10BSD, 2.11BSD manual pages.
 942
 943 --
 944 Copyright (c) 1997-2023 Wolfram Schneider <wosch@FreeBSD.org>
 945 URL: https://cgit.freebsd.org/src/tree/share/misc/bsd-family-tree