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