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  |     v              |      |   9.0              |                    |
 410  |                    |      |                    |                    |
 411  |                    |      |                    |            DragonFly 5.8
 412  |                    |      |                    |                    |
 413  |                    |      |                    |            DragonFly 5.6.3
 414  |                    |      |                    |                    |
 415 FreeBSD 13 -current   |  NetBSD -current   OpenBSD -current    DragonFly -current
 416  |                    |      |                    |                    |
 417  v                    v      v                    v                    v
 418
 419 Time
 420 ----------------
 421
 422 Time tolerance +/- 6 months, depending on which book/article you read; if it
 423 was the announcement in Usenet or if it was available as tape.
 424
 425 [44B] McKusick, Marshall Kirk, Keith Bostic, Michael J Karels,
 426         and John Quarterman. The Design and Implementation of
 427         the 4.4BSD Operating System.
 428 [APL] Apple website [https://www.apple.com/macosx/]
 429 [BSDI] Berkeley Software Design, Inc.
 430 [DFB] DragonFlyBSD Project, The.
 431 [DOC] README, COPYRIGHT on tape.
 432 [FBD] FreeBSD Project, The.
 433 [KB]  Keith Bostic. BSD2.10 available from Usenix. comp.unix.sources,
 434         Volume 11, Info 4, April, 1987.
 435 [KKK] Mike Karels, Kirk McKusick, and Keith Bostic. tahoe announcement.
 436         comp.bugs.4bsd.ucb-fixes, June 15, 1988.
 437 [KSJ] Michael J. Karels, Carl F. Smith, and William F. Jolitz.
 438         Changes in the Kernel in 2.9BSD. Second Berkeley Software
 439         Distribution UNIX Version 2.9, July, 1983.
 440 [NBD] NetBSD Project, The.
 441 [OBD] OpenBSD Project, The.
 442 [QCU] Salus, Peter H. A quarter century of UNIX.
 443 [SMS] Steven M. Schultz. 2.11BSD, UNIX for the PDP-11.
 444 [TUHS] The Unix Historical Society.  http://minnie.tuhs.org/Unix_History/.
 445 [USE] Usenet announcement.
 446 [WRS] Wind River Systems, Inc.
 447 [dmr] Dennis Ritchie, via E-Mail
 448
 449 Multics                 1965
 450 UNIX                    Summer 1969
 451                                 DEC PDP-7
 452 First   Edition         1971-11-03 [QCU]
 453                                 DEC PDP-11/20, Assembler
 454 Second  Edition         1972-06-12 [QCU]
 455                                 10 UNIX installations
 456 Third   Edition         1973-02-xx [QCU]
 457                                 Pipes, 16 installations
 458 Fourth  Edition         1973-11-xx [QCU]
 459                                 rewriting in C effected,
 460                                 above 30 installations
 461 Fifth   Edition         1974-06-xx [QCU]
 462                                 above 50 installations
 463 Sixth   Edition         1975-05-xx [QCU]
 464                                 port to DEC Vax
 465 Seventh Edition         1979-01-xx [QCU] 1979-01-10 [TUHS]
 466                                 first portable UNIX
 467 Eighth  Edition         1985-02-xx [QCU]
 468                                 VAX 11/750, VAX 11/780 [dmr]
 469                                 descended from 4.1c BSD [dmr]
 470                                 descended from 4.1 BSD [44B]
 471                         scooping-out and replacement of the character-device
 472                         and networking part by the streams mechanism
 473
 474 Ninth   Edition         1986-09-xx [QCU]
 475 Tenth   Edition         1989-10-xx [QCU]
 476
 477 1BSD                    late 1977
 478                         1978-03-09 [QCU]
 479                                 PDP-11, Pascal, ex(1)
 480                                 30 free copies of 1BSD sent out
 481                                 35 tapes sold for 50 USD [QCU]
 482 2BSD                    mid 1978 [QCU] 1979-05-10 [TUHS]
 483                                 75 2BSD tapes shipped
 484 2.79BSD                 1980-04-xx [TUHS]
 485 2.8BSD                  1981-07-xx [KSJ]
 486
 487 2.8.1BSD                1982-01-xx [QCU]
 488                                 set of performance improvements
 489 2.9BSD                  1983-07-xx [KSJ]
 490 2.9.1BSD                1983-11-xx [TUHS]
 491 2.9BSD-Seismo           1985-08-xx [SMS]
 492 2.10BSD                 1987-04-xx [KKK]
 493 2.10.1BSD               1989-01-xx [SMS]
 494 2.11BSD                 1992-02-xx [SMS]
 495 2.11BSD rev #430        1999-12-13 [SMS]
 496
 497 32V                     1978-1[01]-xx [QCU] 1979-03-26 [TUHS]
 498 3BSD                    late 1979 [QCU] March 1980 [TUHS]
 499                                 virtual memory, page replacement,
 500                                 demand paging
 501 4.0BSD                  1980-10-xx
 502 4.1BSD                  1981-07-08 [DOC]
 503 4.1aBSD                 1982-04-xx
 504                                 alpha release, 100 sites, networking [44B]
 505 4.1bBSD                         internal release, fast filesystem [44B]
 506 4.1cBSD                 late 1982
 507                                 beta release, IPC [44B]
 508 4.2BSD                  1983-09-xx [QCU]
 509                         1983-08-03 [DOC]
 510 4.3BSD                  1986-06-xx [QCU]
 511                         1986-04-05 [KB], [DOC]
 512 4.3BSD Tahoe            1988-06-15 [QCU], [DOC]
 513 4.3BSD NET/1            1988-11-xx [QCU]
 514                         1989-01-01 [DOC]
 515 4.3BSD Reno             1990-06-29 [QCU], [DOC]
 516 4.3BSD NET/2            1991-06-28 [QCU], [DOC]
 517
 518 BSD/386 ALPHA           1991-12-xx [BSDI]
 519                                 first code released to people outside BSDI
 520 386BSD 0.0              1992-02-xx [DOC]
 521 BSD/386 0.3.1           1992-04-xx [BSDI] first ext. beta; B customers
 522 BSD/386 0.3.3           1992-06-xx [BSDI] first CDROM version
 523 386BSD 0.1              1992-07-28 [DOC]
 524 4.4BSD Alpha            1992-07-07
 525 BSD/386 0.9.3           1992-10-xx [BSDI]
 526                                 first external gamma; G customers
 527 BSD/386 0.9.4           1992-12-xx [BSDI]
 528                                 would have been 1.0 except for request
 529                                 for preliminary injunction
 530 BSD/386 1.0             1993-03-xx [BSDI]
 531                                 injunction denied; first official release
 532 NetBSD 0.8              1993-04-20 [NBD]
 533 4.4BSD                  1993-06-01 [USE]
 534 NetBSD 0.9              1993-08-23 [NBD]
 535 FreeBSD 1.0             1993-11-01 [FBD]
 536 FreeBSD 1.0.2           1993-11-14 [FBD]
 537                                 supersedes 1.0 13 days after release.
 538 BSD/386 1.1             1994-02-xx [BSDI]
 539 4.4BSD Lite             1994-03-01 [USE]
 540 FreeBSD 1.1             1994-05-07 [FBD]
 541 FreeBSD 1.1.5           1994-06-30 [FBD]
 542 FreeBSD 1.1.5.1         1994-07-05 [FBD]
 543                                 supersedes 1.1.5 5 days after release.
 544 NetBSD 1.0              1994-10-26 [NBD]
 545 386BSD 1.0              1994-11-12 [USE]
 546 FreeBSD 2.0             1994-11-23 [FBD]
 547 BSD/OS 2.0              1995-01-xx [BSDI] 4.4 lite based
 548 FreeBSD 2.0.5           1995-06-10 [FBD]
 549 BSD/OS 2.0.1            1995-06-xx [BSDI]
 550 4.4BSD Lite Release 2   1995-06-xx [44B]
 551                                 the true final distribution from the CSRG
 552 FreeBSD 2.1.0           1995-11-19 [FBD]
 553 NetBSD 1.1              1995-11-26 [NBD]
 554 BSD/OS 2.1              1996-01-xx [BSDI]
 555 FreeBSD 2.1.5           1996-07-14 [FBD]
 556 NetBSD 1.2              1996-10-04 [NBD]
 557 OpenBSD 2.0             1996-10-18 [OBD]
 558 FreeBSD 2.1.6           1996-11-16 [FBD]
 559 FreeBSD 2.1.6.1         1996-11-25 [FBD] (sendmail security release)
 560 Rhapsody                1997-xx-xx
 561 FreeBSD 2.1.7           1997-02-20 [FBD]
 562 BSD/OS 3.0              1997-02-xx [BSDI] 4.4 lite2 based
 563 FreeBSD 2.2.0           1997-03-16 [FBD]
 564 FreeBSD 2.2.1           1997-03-25 [FBD]
 565 FreeBSD 2.2.2           1997-05-16 [FBD]
 566 NetBSD 1.2.1            1997-05-20 [NBD] (patch release)
 567 OpenBSD 2.1             1997-06-01 [OBD]
 568 FreeBSD 2.2.5           1997-10-22 [FBD]
 569 OpenBSD 2.2             1997-12-01 [OBD]
 570 NetBSD 1.3              1998-01-04 [NBD]
 571 FreeBSD 2.2.6           1998-03-25 [FBD]
 572 NetBSD 1.3.1            1998-03-09 [NBD] (patch release)
 573 BSD/OS 3.1              1998-03-xx [BSDI]
 574 OpenBSD 2.3             1998-05-19 [OBD]
 575 NetBSD 1.3.2            1998-05-29 [NBD] (patch release)
 576 FreeBSD 2.2.7           1998-07-22 [FBD]
 577 BSD/OS 4.0              1998-08-xx [BSDI]
 578                                 2-lock MP support, ELF executables
 579 FreeBSD 3.0             1998-10-16 [FBD]
 580                                 FreeBSD-3.0 is a snapshot from -current,
 581                                 while 3.1 and 3.2 are from 3.x-stable which
 582                                 was branched quite some time after 3.0-release
 583 FreeBSD 2.2.8           1998-11-29 [FBD]
 584 OpenBSD 2.4             1998-12-01 [OBD]
 585 NetBSD 1.3.3            1998-12-23 [NBD] (patch release)
 586 FreeBSD 3.1             1999-02-15 [FBD]
 587 BSD/OS 4.0.1            1999-03-xx [BSDI]
 588 NetBSD 1.4              1999-05-12 [NBD]
 589 FreeBSD 3.2             1999-05-17 [FBD]
 590 OpenBSD 2.5             1999-05-19 [OBD]
 591 NetBSD 1.4.1            1999-08-26 [NBD] (patch release)
 592 FreeBSD 3.3             1999-09-17 [FBD]
 593 OpenBSD 2.6             1999-12-01 [OBD]
 594 FreeBSD 3.4             1999-12-20 [FBD]
 595 BSD/OS 4.1              1999-12-xx [BSDI]
 596 FreeBSD 4.0             2000-03-13 [FBD]
 597 NetBSD 1.4.2            2000-03-19 [NBD] (patch release)
 598 OpenBSD 2.7             2000-06-15 [OBD]
 599 FreeBSD 3.5             2000-06-24 [FBD]
 600 FreeBSD 4.1             2000-07-27 [FBD]
 601 FreeBSD 3.5.1           2000-07-28 [FBD]
 602 FreeBSD 4.1.1           2000-09-25 [FBD] (a network-only patch release)
 603 FreeBSD 4.2             2000-11-21 [FBD]
 604 NetBSD 1.4.3            2000-11-25 [NBD] (patch release)
 605 BSD/OS 4.2              2000-11-29 [BSDI]
 606 OpenBSD 2.8             2000-12-01 [OBD]
 607 NetBSD 1.5              2000-12-06 [NBD]
 608 Mac OS X 10.0           2001-03-24 [APL]
 609 FreeBSD 4.3             2001-04-20 [FBD]
 610 OpenBSD 2.9             2001-06-01 [OBD]
 611 NetBSD 1.5.1            2001-07-11 [NBD] (patch release)
 612 NetBSD 1.5.2            2001-09-13 [NBD] (patch release)
 613 FreeBSD 4.4             2001-09-18 [FBD]
 614 Mac OS X 10.1           2001-09-29 [APL]
 615 OpenBSD 3.0             2001-12-01 [OBD]
 616 FreeBSD 4.5             2002-01-29 [FBD]
 617 BSD/OS 4.3              2002-03-14 [WRS]
 618 OpenBSD 3.1             2002-05-19 [OBD]
 619 FreeBSD 4.6             2002-06-15 [FBD]
 620 NetBSD 1.5.3            2002-07-22 [NBD] (patch release)
 621 FreeBSD 4.6.2           2002-08-15 [FBD] (patch release)
 622 Mac OS X 10.2           2002-08-23 [APL]
 623 NetBSD 1.6              2002-09-14 [NBD]
 624 FreeBSD 4.7             2002-10-08 [FBD]
 625 OpenBSD 3.2             2002-11-01 [OBD]
 626 FreeBSD 5.0             2003-01-17 [FBD]
 627                                 FreeBSD 5.0 is a separate branch off of
 628                                 -current, similar to 3.0.
 629 FreeBSD 4.8             2003-04-03 [FBD]
 630 NetBSD 1.6.1            2003-04-21 [NBD] (patch release)
 631 OpenBSD 3.3             2003-05-01 [OBD]
 632 BSD/OS 5.0              2003-05-?? [WRS]
 633 FreeBSD 5.1             2003-06-09 [FBD]
 634 Mac OS X 10.3           2003-10-24 [APL]
 635 FreeBSD 4.9             2003-10-28 [FBD]
 636 BSD/OS 5.1 ISE          2003-10-?? [WRS] (final version)
 637 OpenBSD 3.4             2003-11-01 [OBD]
 638 FreeBSD 5.2             2004-01-12 [FBD]
 639 FreeBSD 5.2.1           2004-02-22 [FBD] (patch release)
 640 NetBSD 1.6.2            2004-03-01 [NBD] (patch release)
 641 OpenBSD 3.5             2004-04-01 [OBD]
 642 FreeBSD 4.10            2004-05-27 [FBD]
 643 DragonFly 1.0           2004-07-12 [DFB]
 644 OpenBSD 3.6             2004-10-29 [OBD]
 645 FreeBSD 5.3             2004-11-06 [FBD]
 646 NetBSD 2.0              2004-12-09 [NBD]
 647 FreeBSD 4.11            2005-01-25 [FBD]
 648 DragonFly 1.2.0         2005-04-08 [DFB]
 649 NetBSD 2.0.2            2005-04-14 [NBD] (security/critical release)
 650 Mac OS X 10.4           2005-04-29 [APL]
 651 FreeBSD 5.4             2005-05-09 [FBD]
 652 OpenBSD 3.7             2005-05-19 [OBD]
 653 NetBSD 2.0.3            2005-10-31 [NBD] (security/critical release)
 654 OpenBSD 3.8             2005-11-01 [OBD]
 655 FreeBSD 6.0             2005-11-01 [FBD]
 656 NetBSD 2.1              2005-11-02 [NBD]
 657 NetBSD 3.0              2005-12-23 [NBD]
 658 DragonFly 1.4.0         2006-01-08 [DFB]
 659 FreeBSD 2.2.9           2006-04-01 [FBD]
 660 OpenBSD 3.9             2006-05-01 [OBD]
 661 FreeBSD 6.1             2006-05-08 [FBD]
 662 FreeBSD 5.5             2006-05-25 [FBD]
 663 NetBSD 3.0.1            2006-07-24 [NBD] (security/critical release)
 664 DragonFly 1.6.0         2006-07-24 [DFB]
 665 OpenBSD 4.0             2006-11-01 [OBD]
 666 NetBSD 3.0.2            2006-11-04 [NBD] (security/critical release)
 667 NetBSD 3.1              2006-11-04 [NBD]
 668 FreeBSD 6.2             2007-01-15 [FBD]
 669 DragonFly 1.8.0         2007-01-30 [DFB]
 670 OpenBSD 4.1             2007-05-01 [OBD]
 671 DragonFly 1.10.0        2007-08-06 [DFB]
 672 Mac OS X 10.5           2007-10-26 [APL]
 673 OpenBSD 4.2             2007-11-01 [OBD]
 674 NetBSD 4.0              2007-12-19 [NBD]
 675 FreeBSD 6.3             2008-01-18 [FBD]
 676 DragonFly 1.12.0        2008-02-26 [DFB]
 677 FreeBSD 7.0             2008-02-27 [FBD]
 678 OpenBSD 4.3             2008-05-01 [OBD]
 679 DragonFly 2.0.0         2008-07-21 [DFB]
 680 OpenBSD 4.4             2008-11-01 [OBD]
 681 FreeBSD 6.4             2008-11-28 [FBD]
 682 FreeBSD 7.1             2009-01-04 [FBD]
 683 DragonFly 2.2.0         2009-02-17 [DFB]
 684 NetBSD 5.0              2009-04-29 [NBD]
 685 OpenBSD 4.5             2009-05-01 [OBD]
 686 FreeBSD 7.2             2009-05-04 [FBD]
 687 Mac OS X 10.6           2009-06-08 [APL]
 688 NetBSD 5.0.1            2009-08-02 [NBD] (security/critical release)
 689 DragonFly 2.4.0         2009-09-16 [DFB]
 690 OpenBSD 4.6             2009-10-18 [OBD]
 691 FreeBSD 8.0             2009-11-26 [FBD]
 692 NetBSD 5.0.2            2010-02-12 [NBD] (security/critical release)
 693 FreeBSD 7.3             2010-03-23 [FBD]
 694 DragonFly 2.6.0         2010-03-28 [DFB]
 695 OpenBSD 4.7             2010-05-19 [OBD]
 696 FreeBSD 8.1             2010-07-24 [FBD]
 697 DragonFly 2.8.2         2010-10-30 [DFB]
 698 OpenBSD 4.8             2010-11-01 [OBD]
 699 NetBSD 5.1              2010-11-19 [NBD]
 700 FreeBSD 7.4             2011-02-24 [FBD]
 701 FreeBSD 8.2             2011-02-24 [FBD]
 702 DragonFly 2.10.1        2011-04-26 [DFB]
 703 OpenBSD 4.9             2011-05-01 [OBD]
 704 Mac OS X 10.7           2011-07-20 [APL]
 705 OpenBSD 5.0             2011-11-01 [OBD]
 706 FreeBSD 9.0             2012-01-12 [FBD]
 707 NetBSD 5.1.2            2012-02-02 [NBD] (security/critical release)
 708 DragonFly 3.0.1         2012-02-21 [DFB]
 709 FreeBSD 8.3             2012-04-18 [FBD]
 710 OpenBSD 5.1             2012-05-01 [OBD]
 711 Mac OS X 10.8           2012-07-25 [APL]
 712 NetBSD 6.0              2012-10-17 [NBD]
 713 OpenBSD 5.2             2012-11-01 [OBD]
 714 DragonFly 3.2.1         2012-11-02 [DFB]
 715 NetBSD 5.2              2012-12-03 [NBD]
 716 NetBSD 6.0.1            2012-12-26 [NBD] (security/critical release)
 717 FreeBSD 9.1             2012-12-30 [FBD]
 718 DragonFly 3.4.1         2013-04-29 [DFB]
 719 OpenBSD 5.3             2013-05-01 [OBD]
 720 NetBSD 6.0.2            2013-05-18 [NBD] (security/critical release)
 721 NetBSD 6.1              2013-05-18 [NBD]
 722 FreeBSD 8.4             2013-06-07 [FBD]
 723 NetBSD 6.1.1            2013-08-22 [NBD]
 724 NetBSD 5.1.3            2013-09-29 [NBD]
 725 NetBSD 5.2.1            2013-09-29 [NBD]
 726 FreeBSD 9.2             2013-09-30 [FBD]
 727 NetBSD 6.0.3            2013-09-30 [NBD]
 728 NetBSD 6.1.2            2013-09-30 [NBD]
 729 Mac OS X 10.9           2013-10-22 [APL]
 730 OpenBSD 5.4             2013-11-01 [OBD]
 731 DragonFly 3.6.0         2013-11-25 [DFB]
 732 FreeBSD 10.0            2014-01-20 [FBD]
 733 NetBSD 5.1.4            2014-01-25 [NBD]
 734 NetBSD 5.2.2            2014-01-25 [NBD]
 735 NetBSD 6.0.4            2014-01-25 [NBD]
 736 NetBSD 6.1.3            2014-01-25 [NBD]
 737 DragonFly 3.6.1         2014-02-22 [DFB]
 738 DragonFly 3.6.2         2014-04-10 [DFB]
 739 NetBSD 6.0.5            2014-04-12 [NBD]
 740 NetBSD 6.1.4            2014-04-12 [NBD]
 741 OpenBSD 5.5             2014-05-01 [OBD]
 742 DragonFly 3.8.0         2014-06-04 [DFB]
 743 DragonFly 3.8.1         2014-06-16 [DFB]
 744 DragonFly 3.6.3         2014-06-17 [DFB]
 745 FreeBSD 9.3             2014-07-05 [FBD]
 746 DragonFly 3.8.2         2014-08-08 [DFB]
 747 NetBSD 6.0.6            2014-09-22 [NBD]
 748 NetBSD 6.1.5            2014-09-22 [NBD]
 749 Mac OS X 10.10          2014-10-16 [APL]
 750 OpenBSD 5.6             2014-11-01 [OBD]
 751 FreeBSD 10.1            2014-11-14 [FBD]
 752 DragonFly 4.0.1         2014-11-25 [DFB]
 753 DragonFly 4.0.2         2015-01-07 [DFB]
 754 DragonFly 4.0.3         2015-01-21 [DFB]
 755 DragonFly 4.0.4         2015-03-09 [DFB]
 756 DragonFly 4.0.5         2015-03-23 [DFB]
 757 OpenBSD 5.7             2015-05-01 [OBD]
 758 DragonFly 4.2.0         2015-06-29 [DFB]
 759 FreeBSD 10.2            2015-08-13 [FBD]
 760 NetBSD 7.0              2015-09-25 [NBD]
 761 OS X 10.11              2015-09-30 [APL]
 762 OpenBSD 5.8             2015-10-18 [OBD]
 763 DragonFly 4.4.1         2015-12-07 [DFB]
 764 OpenBSD 5.9             2016-03-29 [OBD]
 765 FreeBSD 10.3            2016-04-04 [FBD]
 766 NetBSD 7.0.1            2016-05-22 [NBD]
 767 DragonFly 4.6.0         2016-08-02 [DFB]
 768 OpenBSD 6.0             2016-09-01 [OBD]
 769 macOS 10.12             2016-09-20 [APL]
 770 FreeBSD 11.0            2016-10-10 [FBD]
 771 NetBSD 7.0.2            2016-10-21 [NBD]
 772 NetBSD 7.1              2017-03-11 [NBD]
 773 DragonFly 4.8.0         2017-03-27 [DFB]
 774 OpenBSD 6.1             2017-04-11 [OBD]
 775 FreeBSD 11.1            2017-07-26 [FBD]
 776 macOS 10.13             2017-09-25 [APL]
 777 FreeBSD 10.4            2017-10-03 [FBD]
 778 OpenBSD 6.2             2017-10-09 [OBD]
 779 DragonFly 5.0.0         2017-10-16 [DFB]
 780 DragonFly 5.0.1         2017-11-06 [DFB]
 781 DragonFly 5.0.2         2017-12-04 [DFB]
 782 NetBSD 7.1.1            2017-12-22 [NBD]
 783 NetBSD 7.1.2            2018-03-15 [NBD]
 784 OpenBSD 6.3             2018-04-02 [OBD]
 785 DragonFly 5.2.0         2018-04-10 [DFB]
 786 DragonFly 5.2.1         2018-05-20 [DFB]
 787 DragonFly 5.2.2         2018-06-18 [DFB]
 788 FreeBSD 11.2            2018-06-27 [FBD]
 789 NetBSD 8.0              2018-07-17 [NBD]
 790 NetBSD 7.2              2018-08-29 [NBD]
 791 macOS 10.14             2018-09-24 [APL]
 792 OpenBSD 6.4             2018-10-18 [OBD]
 793 DragonFly 5.4.0         2018-12-03 [DFB]
 794 FreeBSD 12.0            2018-12-11 [FBD]
 795 DragonFly 5.4.1         2018-12-24 [DFB]
 796 OpenBSD 6.5             2019-05-01 [OBD]
 797 NetBSD 8.1              2019-06-04 [NBD]
 798 DragonFly 5.6           2019-06-17 [DFB]
 799 DragonFly 5.6.1         2019-06-19 [DFB]
 800 FreeBSD 11.3            2019-07-09 [FBD]
 801 DragonFly 5.6.2         2019-08-11 [DFB]
 802 OpenBSD 6.6             2019-10-17 [OBD]
 803 macOS 10.15             2019-10-07 [APL]
 804 macOS 10.15.1           2019-10-29 [APL] (security/critical release)
 805 FreeBSD 12.1            2019-11-04 [FBD]
 806 NetBSD 9.0              2020-02-14 [NBD]
 807 DragonFly 5.8           2020-03-03 [DFB]
 808 DragonFly 5.6.3         2020-03-11 [DFB]
 809
 810 Bibliography
 811 ------------------------
 812
 813 Leffler, Samuel J., Marshall Kirk McKusick, Michael J Karels and John
 814 Quarterman. The Design and Implementation of the 4.3BSD UNIX Operating
 815 System. Reading, Mass. Addison-Wesley, 1989. ISBN 0-201-06196-1
 816
 817 Salus, Peter H. A quarter century of UNIX. Addison-Wesley Publishing
 818 Company, Inc., 1994. ISBN 0-201-54777-5
 819
 820 McKusick, Marshall Kirk, Keith Bostic, Michael J Karels, and John
 821 Quarterman. The Design and Implementation of the 4.4BSD Operating
 822 System. Reading, Mass. Addison-Wesley, 1996. ISBN 0-201-54979-4
 823
 824 McKusick, Marshall Kirk, George Neville-Neil. The Design and
 825 Implementation of the FreeBSD Operating System.
 826 Addison-Wesley Professional, Published: Aug 2, 2004. ISBN 0-201-70245-2
 827
 828 McKusick, Marshall Kirk, George Neville-Neil, Robert Watson. The
 829 Design and Implementation of the FreeBSD Operating System, 2nd Edition.
 830 Pearson Education, Inc., 2014. ISBN 0-321-96897-2
 831
 832 Doug McIlroy. Research Unix Reader.
 833
 834 Michael G. Brown. The Role of BSD in the Development of Unix.
 835 Presented to the Tasmanian Unix Special Interest Group of the
 836 Australian Computer Society, Hobart, August 1993.
 837
 838 Peter H. Salus. Unix at 25. Byte Magazine, October 1994.
 839 URL: http://www.byte.com/art/9410/sec8/art3.htm
 840
 841 Andreas Klemm, Lars Köller. If you're going to San Francisco ...
 842 Die freien BSD-Varianten von Unix. c't April 1997, page 368ff.
 843
 844 BSD Release Announcements collection.
 845 URL: https://www.FreeBSD.org/releases/
 846
 847 BSD Hypertext Man Pages
 848 URL: https://www.FreeBSD.org/cgi/man.cgi
 849
 850 UNIX history graphing project
 851 URL: http://minnie.tuhs.org/Unix_History/index.html
 852
 853 UNIX history
 854 URL: http://www.levenez.com/unix/
 855
 856 James Howard: The BSD Family Tree
 857 URL: http://ezine.daemonnews.org/200104/bsd_family.html
 858 ("what are the differences between FreeBSD, NetBSD, and OpenBSD?")
 859
 860
 861 Acknowledgments
 862 ---------------
 863
 864 Josh Gilliam for suggestions, bug fixes, and finding very old
 865 original BSD announcements from Usenet or tapes.
 866
 867 Steven M. Schultz for providing 2.8BSD, 2.10BSD, 2.11BSD manual pages.
 868
 869 --
 870 Copyright (c) 1997-2012 Wolfram Schneider <wosch@FreeBSD.ORG>
 871 URL: https://svnweb.freebsd.org/base/head/share/misc/bsd-family-tree
 872
 873 $FreeBSD$