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  |         v         | |     |    |            |             |
 114  |     FreeBSD 2.2.8 | |     |    |            |             |
 115  |                   | |     |    |        OpenBSD 2.4       |
 116 FreeBSD 3.0 <--------* |     |    v            |             |
 117  |                     |     | NetBSD 1.3.3    |             |
 118  *---FreeBSD 3.1       |     |                 |             |
 119  |       |             |     |                 |           BSD/OS 4.0.1
 120  |   FreeBSD 3.2----*  |  NetBSD 1.4       OpenBSD 2.5       |
 121  |       |          |  |  |  |    |            |             |
 122  |       |          |  |  |  |    |            |             |
 123  |       |          |  |  |  |    |            |             |
 124  |   FreeBSD 3.3    |  |  |  | NetBSD 1.4.1    |             |
 125  |       |          |  |  |  |    |        OpenBSD 2.6       |
 126  |   FreeBSD 3.4    |  |  |  |    |            |             |
 127  |           |      |  |  |  |    |            |           BSD/OS 4.1
 128 FreeBSD 4.0  |      |  |  |  | NetBSD 1.4.2    |             |
 129  |           |      |  |  |  |    |            |             |
 130  |           |      |  |  |  |    |            |             |
 131  |   FreeBSD 3.5    |  |  |  |    |        OpenBSD 2.7       |
 132  |           |      |  |  |  |    |            |             |
 133  |   FreeBSD 3.5.1  |  |  |  |    |            |             |
 134  |                  |  |  |  |    |            |             |
 135  *---FreeBSD 4.1    |  |  |  |    |            |             |
 136  |      |           |  | (?) |    |            |             |
 137  |   FreeBSD 4.1.1  |  |  /  |    |            |             |
 138  |      |           |  | /   |    |            |             |
 139  |   FreeBSD 4.2   Darwin/   | NetBSD 1.4.3    |             |
 140  |      |         Mac OS X   |             OpenBSD 2.8     BSD/OS 4.2
 141  |      |             |      |                 |             |
 142  |      |             |      |                 |             |
 143  |      |           10.0  NetBSD 1.5           |             |
 144  |   FreeBSD 4.3      |      |    |            |             |
 145  |      |             |      |    |        OpenBSD 2.9       |
 146  |      |             |      | NetBSD 1.5.1    |             |
 147  |      |             |      |    |            |             |
 148  |   FreeBSD 4.4-.    |      | NetBSD 1.5.2    |             |
 149  |      |        | Mac OS X  |    |            |             |
 150  |      |        |   10.1    |    |        OpenBSD 3.0       |
 151  |   FreeBSD 4.5 |    |      |    |            |             |
 152  |      |         \   |      |    |            |           BSD/OS 4.3
 153  |   FreeBSD 4.6   \  |      |    |        OpenBSD 3.1       |
 154  |      |           \ |      | NetBSD 1.5.3    |             |
 155  |   FreeBSD 4.6.2 Mac OS X  |                 |             |
 156  |      |            10.2    |                 |             |
 157  |   FreeBSD 4.7      |      |                 |             |
 158  |      |             |   NetBSD 1.6       OpenBSD 3.2       |
 159  |   FreeBSD 4.8      |      |    |            |             |
 160  |      |             |      | NetBSD 1.6.1    |             |
 161  |      |--------.    |      |    |        OpenBSD 3.3     BSD/OS 5.0
 162  |      |         \   |      |    |            |             |
 163  |   FreeBSD 4.9   |  |      |    |        OpenBSD 3.4     BSD/OS 5.1 ISE
 164  |      |          |  |      |    |            |
 165  |      |          |  |      | NetBSD 1.6.2    |
 166  |      |          |  |      |    |            |
 167  |      |          |  |      |    |        OpenBSD 3.5
 168  |      |          |  |      |    v            |
 169  |   FreeBSD 4.10  |  |      |                 |
 170  |      |          |  |      |                 |
 171  |   FreeBSD 4.11  |  |      |                 |
 172  |                 |  |      |                 |
 173  |                  `-|------|-----------------|---------------------.
 174  |                    |      |                 |                      \
 175 FreeBSD 5.0           |      |                 |                       |
 176  |                    |      |                 |                       |
 177 FreeBSD 5.1           |      |                 |                 DragonFly 1.0
 178  |          \         |      |                 |                       |
 179  |           ----- Mac OS X  |                 |                       |
 180  |                   10.3    |                 |                       |
 181 FreeBSD 5.2           |      |                 |                       |
 182  |      |             |      |                 |                       |
 183  |   FreeBSD 5.2.1    |      |                 |                       |
 184  |                    |      |                 |                       |
 185  *-------FreeBSD 5.3  |      |                 |                       |
 186  |           |        |      |             OpenBSD 3.6                 |
 187  |           |        |   NetBSD 2.0           |                       |
 188  |           |        |      | |  |            |                DragonFly 1.2.0
 189  |           |     Mac OS X  | | NetBSD 2.0.2  |                       |
 190  |           |       10.4    | |  |            |                       |
 191  |       FreeBSD 5.4  |      | |  |            |                       |
 192  |           |        |      | |  |        OpenBSD 3.7                 |
 193  |           |        |      | | NetBSD 2.0.3  |                       |
 194  |           |        |      | |  |            |                       |
 195  *--FreeBSD  |        |      | |  v        OpenBSD 3.8                 |
 196  |    6.0    |        |      | |               |                       |
 197  |     |     |        |      |  \              |                       |
 198  |     |     |        |      | NetBSD 2.1      |                       |
 199  |     |     |        |      |                 |                       |
 200  |     |     |        |   NetBSD 3.0           |                       |
 201  |     |     |        |      | |  |            |                DragonFly 1.4.0
 202  |     |     |        |      | |  |        OpenBSD 3.9                 |
 203  |  FreeBSD  |        |      | |  |            |                       |
 204  |    6.1    |        |      | |  |            |                       |
 205  |     |  FreeBSD 5.5 |      | |  |            |                       |
 206  |     |              |      | | NetBSD 3.0.1  |                DragonFly 1.6.0
 207  |     |              |      | |  |            |                       |
 208  |     |              |      | |  |        OpenBSD 4.0                 |
 209  |     |              |      | | NetBSD 3.0.2  |                       |
 210  |     |              |      | NetBSD 3.1      |                       |
 211  | FreeBSD 6.2        |      |                 |                       |
 212  |     |              |      |                 |                DragonFly 1.8.0
 213  |     |              |      |             OpenBSD 4.1                 |
 214  |     |              |      |                 |                DragonFly 1.10.0
 215  |     |           Mac OS X  |                 |                       |
 216  |     |             10.5    |                 |                       |
 217  |     |              |      |             OpenBSD 4.2                 |
 218  |     |              |   NetBSD 4.0           |                       |
 219  | FreeBSD 6.3        |      |                 |                       |
 220  |            \       |      |                 |                       |
 221  *--FreeBSD    |      |      |                 |                DragonFly 1.12.0
 222  |    7.0      |      |      |                 |                       |
 223  |     |       |      |      |             OpenBSD 4.3                 |
 224  |     |       |      |      |                 |                DragonFly 2.0.0
 225  |     |    FreeBSD   |      |             OpenBSD 4.4                 |
 226  |     |      6.4     |      |                 |                       |
 227  |     |              |      |                 |                       |
 228  |  FreeBSD 7.1       |      |                 |                       |
 229  |     |              |      |                 |                DragonFly 2.2.0
 230  |  FreeBSD 7.2       |   NetBSD 5.0       OpenBSD 4.5                 |
 231  |             \      |      |    |            |                       |
 232  |              |  Mac OS X  |    |            |                       |
 233  |              |    10.6    |    |            |                       |
 234  |              |     |      |    |            |                DragonFly 2.4.0
 235  |              |     |      |    |        OpenBSD 4.6                 |
 236  |              |     |      |    |            |                       |
 237  *--FreeBSD     |     |      |    |            |                       |
 238  |    8.0       |     |      |    |            |                       |
 239  |     |     FreeBSD  |      |    |            |                       |
 240  |     |       7.3    |      |    |            |                DragonFly 2.6.0
 241  |     |        |     |      |    |        OpenBSD 4.7                 |
 242  |  FreeBSD     |     |      |    |            |                       |
 243  |    8.1       |     |      |    |            |                       |
 244  |     |        |     |      |    |            |                DragonFly 2.8.2
 245  |     |        |     |      |    |        OpenBSD 4.8                 |
 246  |     |        |     |      | NetBSD 5.1      |                       |
 247  |  FreeBSD  FreeBSD  |      |                 |                       |
 248  |    8.2      7.4    |      |                 |               DragonFly 2.10.1
 249  |     |              |      |             OpenBSD 4.9                 |
 250  |     `-----.     Mac OS X  |                 |                       |
 251  |            \      10.7    |                 |                       |
 252  |             |      |      |             OpenBSD 5.0                 |
 253  *--FreeBSD    |      |      |                 |                       |
 254  |    9.0      |      |      |                 |               DragonFly 3.0.1
 255  |     |    FreeBSD   |      |                 |                       |
 256  |     |      8.3     |      |             OpenBSD 5.1                 |
 257  |     |           Mac OS X  |                 |                       |
 258  |     |             10.8    |                 |                       |
 259  |     |              |   NetBSD 6.0           |                       |
 260  |     |              |      |             OpenBSD 5.2         DragonFly 3.2.1
 261  |  FreeBSD           |      |                 |                       |
 262  |    9.1             |      |                 |                       |
 263  |                    |      |                 |                       |
 264 FreeBSD 10 -current   |  NetBSD -current  OpenBSD -current             |
 265  |                    |      |                 |                       |
 266  v                    v      v                 v                       v
 267
 268 Time
 269 ----------------
 270
 271 Time tolerance +/- 6 months, depending on which book/article you read; if it
 272 was the announcement in Usenet or if it was available as tape.
 273
 274 [44B] McKusick, Marshall Kirk, Keith Bostic, Michael J Karels,
 275         and John Quarterman. The Design and Implementation of
 276         the 4.4BSD Operating System.
 277 [APL] Apple website [http://www.apple.com/macosx/]
 278 [BSDI] Berkeley Software Design, Inc.
 279 [DFB] DragonFlyBSD Project, The.
 280 [DOC] README, COPYRIGHT on tape.
 281 [FBD] FreeBSD Project, The.
 282 [KB]  Keith Bostic. BSD2.10 available from Usenix. comp.unix.sources,
 283         Volume 11, Info 4, April, 1987.
 284 [KKK] Mike Karels, Kirk McKusick, and Keith Bostic. tahoe announcement.
 285         comp.bugs.4bsd.ucb-fixes, June 15, 1988.
 286 [KSJ] Michael J. Karels, Carl F. Smith, and William F. Jolitz.
 287         Changes in the Kernel in 2.9BSD. Second Berkeley Software
 288         Distribution UNIX Version 2.9, July, 1983.
 289 [NBD] NetBSD Project, The.
 290 [OBD] OpenBSD Project, The.
 291 [QCU] Salus, Peter H. A quarter century of UNIX.
 292 [SMS] Steven M. Schultz. 2.11BSD, UNIX for the PDP-11.
 293 [TUHS] The Unix Historical Society.  http://minnie.tuhs.org/Unix_History/.
 294 [USE] Usenet announcement.
 295 [WRS] Wind River Systems, Inc.
 296 [dmr] Dennis Ritchie, via E-Mail
 297
 298 Multics                 1965
 299 UNIX                    Summer 1969
 300                                 DEC PDP-7
 301 First   Edition         1971-11-03 [QCU]
 302                                 DEC PDP-11/20, Assembler
 303 Second  Edition         1972-06-12 [QCU]
 304                                 10 UNIX installations
 305 Third   Edition         1973-02-xx [QCU]
 306                                 Pipes, 16 installations
 307 Fourth  Edition         1973-11-xx [QCU]
 308                                 rewriting in C effected,
 309                                 above 30 installations
 310 Fifth   Edition         1974-06-xx [QCU]
 311                                 above 50 installations
 312 Sixth   Edition         1975-05-xx [QCU]
 313                                 port to DEC Vax
 314 Seventh Edition         1979-01-xx [QCU]
 315                                 first portable UNIX
 316 Eighth  Edition         1985-02-xx [QCU]
 317                                 VAX 11/750, VAX 11/780 [dmr]
 318                                 descended from 4.1c BSD [dmr]
 319                                 descended from 4.1 BSD [44B]
 320                         scooping-out and replacement of the character-device
 321                         and networking part by the streams mechanism
 322
 323 Ninth   Edition         1986-09-xx [QCU]
 324 Tenth   Edition         1989-10-xx [QCU]
 325
 326 1BSD                    late 1977
 327                         1978-03-09 [QCU]
 328                                 PDP-11, Pascal, ex(1)
 329                                 30 free copies of 1BSD sent out
 330                                 35 tapes sold for 50 USD [QCU]
 331 2BSD                    mid 1978 [QCU] 1979-05-10 [TUHS]
 332                                 75 2BSD tapes shipped
 333 2.79BSD                 1980-04-xx [TUHS]
 334 2.8BSD                  1981-07-xx [KSJ]
 335
 336 2.8.1BSD                1982-01-xx [QCU]
 337                                 set of performance improvements
 338 2.9BSD                  1983-07-xx [KSJ]
 339 2.9.1BSD                1983-11-xx [TUHS]
 340 2.9BSD-Seismo           1985-08-xx [SMS]
 341 2.10BSD                 1987-04-xx [KKK]
 342 2.10.1BSD               1989-01-xx [SMS]
 343 2.11BSD                 1992-02-xx [SMS]
 344 2.11BSD rev #430        1999-12-13 [SMS]
 345
 346 32V                     1978-1[01]-xx [QCU]
 347 3BSD                    late 1979 [QCU] March 1980 [TUHS]
 348                                 virtual memory, page replacement,
 349                                 demand paging
 350 4.0BSD                  1980-10-xx
 351 4.1BSD                  1981-07-08 [DOC]
 352 4.1aBSD                 1982-04-xx
 353                                 alpha release, 100 sites, networking [44B]
 354 4.1bBSD                         internal release, fast filesystem [44B]
 355 4.1cBSD                 late 1982
 356                                 beta release, IPC [44B]
 357 4.2BSD                  1983-09-xx [QCU]
 358                         1983-08-03 [DOC]
 359 4.3BSD                  1986-06-xx [QCU]
 360                         1986-04-05 [KB], [DOC]
 361 4.3BSD Tahoe            1988-06-15 [QCU], [DOC]
 362 4.3BSD NET/1            1988-11-xx [QCU]
 363                         1989-01-01 [DOC]
 364 4.3BSD Reno             1990-06-29 [QCU], [DOC]
 365 4.3BSD NET/2            1991-06-28 [QCU], [DOC]
 366
 367 BSD/386 ALPHA           1991-12-xx [BSDI]
 368                                 first code released to people outside BSDI
 369 386BSD 0.0              1992-02-xx [DOC]
 370 BSD/386 0.3.1           1992-04-xx [BSDI] first ext. beta; B customers
 371 BSD/386 0.3.3           1992-06-xx [BSDI] first CDROM version
 372 386BSD 0.1              1992-07-28 [DOC]
 373 4.4BSD Alpha            1992-07-07
 374 BSD/386 0.9.3           1992-10-xx [BSDI]
 375                                 first external gamma; G customers
 376 BSD/386 0.9.4           1992-12-xx [BSDI]
 377                                 would have been 1.0 except for request
 378                                 for preliminary injunction
 379 BSD/386 1.0             1993-03-xx [BSDI]
 380                                 injunction denied; first official release
 381 NetBSD 0.8              1993-04-20 [NBD]
 382 4.4BSD                  1993-06-01 [USE]
 383 NetBSD 0.9              1993-08-23 [NBD]
 384 FreeBSD 1.0             1993-11-01 [FBD]
 385 FreeBSD 1.0.2           1993-11-14 [FBD]
 386                                 supersedes 1.0 13 days after release.
 387 BSD/386 1.1             1994-02-xx [BSDI]
 388 4.4BSD Lite             1994-03-01 [USE]
 389 FreeBSD 1.1             1994-05-07 [FBD]
 390 FreeBSD 1.1.5           1994-06-30 [FBD]
 391 FreeBSD 1.1.5.1         1994-07-05 [FBD]
 392                                 supersedes 1.1.5 5 days after release.
 393 NetBSD 1.0              1994-10-26 [NBD]
 394 386BSD 1.0              1994-11-12 [USE]
 395 FreeBSD 2.0             1994-11-23 [FBD]
 396 BSD/OS 2.0              1995-01-xx [BSDI] 4.4 lite based
 397 FreeBSD 2.0.5           1995-06-10 [FBD]
 398 BSD/OS 2.0.1            1995-06-xx [BSDI]
 399 4.4BSD Lite Release 2   1995-06-xx [44B]
 400                                 the true final distribution from the CSRG
 401 FreeBSD 2.1.0           1995-11-19 [FBD]
 402 NetBSD 1.1              1995-11-26 [NBD]
 403 BSD/OS 2.1              1996-01-xx [BSDI]
 404 FreeBSD 2.1.5           1996-07-14 [FBD]
 405 NetBSD 1.2              1996-10-04 [NBD]
 406 OpenBSD 2.0             1996-10-18 [OBD]
 407 FreeBSD 2.1.6           1996-11-16 [FBD]
 408 FreeBSD 2.1.6.1         1996-11-25 [FBD] (sendmail security release)
 409 Rhapsody                1997-xx-xx
 410 FreeBSD 2.1.7           1997-02-20 [FBD]
 411 BSD/OS 3.0              1997-02-xx [BSDI] 4.4 lite2 based
 412 FreeBSD 2.2.0           1997-03-16 [FBD]
 413 FreeBSD 2.2.1           1997-03-25 [FBD]
 414 FreeBSD 2.2.2           1997-05-16 [FBD]
 415 NetBSD 1.2.1            1997-05-20 [NBD] (patch release)
 416 OpenBSD 2.1             1997-06-01 [OBD]
 417 FreeBSD 2.2.5           1997-10-22 [FBD]
 418 OpenBSD 2.2             1997-12-01 [OBD]
 419 NetBSD 1.3              1998-01-04 [NBD]
 420 FreeBSD 2.2.6           1998-03-25 [FBD]
 421 NetBSD 1.3.1            1998-03-09 [NBD] (patch release)
 422 BSD/OS 3.1              1998-03-xx [BSDI]
 423 OpenBSD 2.3             1998-05-19 [OBD]
 424 NetBSD 1.3.2            1998-05-29 [NBD] (patch release)
 425 FreeBSD 2.2.7           1998-07-22 [FBD]
 426 BSD/OS 4.0              1998-08-xx [BSDI]
 427                                 2-lock MP support, ELF executables
 428 FreeBSD 3.0             1998-10-16 [FBD]
 429                                 FreeBSD-3.0 is a snapshot from -current,
 430                                 while 3.1 and 3.2 are from 3.x-stable which
 431                                 was branched quite some time after 3.0-release
 432 FreeBSD 2.2.8           1998-11-29 [FBD]
 433 OpenBSD 2.4             1998-12-01 [OBD]
 434 NetBSD 1.3.3            1998-12-23 [NBD] (patch release)
 435 FreeBSD 3.1             1999-02-15 [FBD]
 436 BSD/OS 4.0.1            1999-03-xx [BSDI]
 437 NetBSD 1.4              1999-05-12 [NBD]
 438 FreeBSD 3.2             1999-05-17 [FBD]
 439 OpenBSD 2.5             1999-05-19 [OBD]
 440 NetBSD 1.4.1            1999-08-26 [NBD] (patch release)
 441 FreeBSD 3.3             1999-09-17 [FBD]
 442 OpenBSD 2.6             1999-12-01 [OBD]
 443 FreeBSD 3.4             1999-12-20 [FBD]
 444 BSD/OS 4.1              1999-12-xx [BSDI]
 445 FreeBSD 4.0             2000-03-13 [FBD]
 446 NetBSD 1.4.2            2000-03-19 [NBD] (patch release)
 447 OpenBSD 2.7             2000-06-15 [OBD]
 448 FreeBSD 3.5             2000-06-24 [FBD]
 449 FreeBSD 4.1             2000-07-27 [FBD]
 450 FreeBSD 3.5.1           2000-07-28 [FBD]
 451 FreeBSD 4.1.1           2000-09-25 [FBD] (a network-only patch release)
 452 FreeBSD 4.2             2000-11-21 [FBD]
 453 NetBSD 1.4.3            2000-11-25 [NBD] (patch release)
 454 BSD/OS 4.2              2000-11-29 [BSDI]
 455 OpenBSD 2.8             2000-12-01 [OBD]
 456 NetBSD 1.5              2000-12-06 [NBD]
 457 Mac OS X 10.0           2001-03-24 [APL]
 458 FreeBSD 4.3             2001-04-20 [FBD]
 459 OpenBSD 2.9             2001-06-01 [OBD]
 460 NetBSD 1.5.1            2001-07-11 [NBD] (patch release)
 461 NetBSD 1.5.2            2001-09-13 [NBD] (patch release)
 462 FreeBSD 4.4             2001-09-18 [FBD]
 463 Mac OS X 10.1           2001-09-29 [APL]
 464 OpenBSD 3.0             2001-12-01 [OBD]
 465 FreeBSD 4.5             2002-01-29 [FBD]
 466 BSD/OS 4.3              2002-03-14 [WRS]
 467 OpenBSD 3.1             2002-05-19 [OBD]
 468 FreeBSD 4.6             2002-06-15 [FBD]
 469 NetBSD 1.5.3            2002-07-22 [NBD] (patch release)
 470 FreeBSD 4.6.2           2002-08-15 [FBD] (patch release)
 471 Mac OS X 10.2           2002-08-23 [APL]
 472 NetBSD 1.6              2002-09-14 [NBD]
 473 FreeBSD 4.7             2002-10-08 [FBD]
 474 OpenBSD 3.2             2002-11-01 [OBD]
 475 FreeBSD 5.0             2003-01-17 [FBD]
 476                                 FreeBSD 5.0 is a separate branch off of
 477                                 -current, similar to 3.0.
 478 FreeBSD 4.8             2003-04-03 [FBD]
 479 NetBSD 1.6.1            2003-04-21 [NBD] (patch release)
 480 OpenBSD 3.3             2003-05-01 [OBD]
 481 BSD/OS 5.0              2003-05-?? [WRS]
 482 FreeBSD 5.1             2003-06-09 [FBD]
 483 Mac OS X 10.3           2003-10-24 [APL]
 484 FreeBSD 4.9             2003-10-28 [FBD]
 485 BSD/OS 5.1 ISE          2003-10-?? [WRS] (final version)
 486 OpenBSD 3.4             2003-11-01 [OBD]
 487 FreeBSD 5.2             2004-01-12 [FBD]
 488 FreeBSD 5.2.1           2004-02-22 [FBD] (patch release)
 489 NetBSD 1.6.2            2004-03-01 [NBD] (patch release)
 490 OpenBSD 3.5             2004-04-01 [OBD]
 491 FreeBSD 4.10            2004-05-27 [FBD]
 492 DragonFly 1.0           2004-07-12 [DFB]
 493 OpenBSD 3.6             2004-10-29 [OBD]
 494 FreeBSD 5.3             2004-11-06 [FBD]
 495 NetBSD 2.0              2004-12-09 [NBD]
 496 FreeBSD 4.11            2005-01-25 [FBD]
 497 DragonFly 1.2.0         2005-04-08 [DFB]
 498 NetBSD 2.0.2            2005-04-14 [NBD] (security/critical release)
 499 Mac OS X 10.4           2005-04-29 [APL]
 500 FreeBSD 5.4             2005-05-09 [FBD]
 501 OpenBSD 3.7             2005-05-19 [OBD]
 502 NetBSD 2.0.3            2005-10-31 [NBD] (security/critical release)
 503 OpenBSD 3.8             2005-11-01 [OBD]
 504 FreeBSD 6.0             2005-11-01 [FBD]
 505 NetBSD 2.1              2005-11-02 [NBD]
 506 NetBSD 3.0              2005-12-23 [NBD]
 507 DragonFly 1.4.0         2006-01-08 [DFB]
 508 OpenBSD 3.9             2006-05-01 [OBD]
 509 FreeBSD 6.1             2006-05-08 [FBD]
 510 FreeBSD 5.5             2006-05-25 [FBD]
 511 NetBSD 3.0.1            2006-07-24 [NBD] (security/critical release)
 512 DragonFly 1.6.0         2006-07-24 [DFB]
 513 OpenBSD 4.0             2006-11-01 [OBD]
 514 NetBSD 3.0.2            2006-11-04 [NBD] (security/critical release)
 515 NetBSD 3.1              2006-11-04 [NBD]
 516 FreeBSD 6.2             2007-01-15 [FBD]
 517 DragonFly 1.8.0         2007-01-30 [DFB]
 518 OpenBSD 4.1             2007-05-01 [OBD]
 519 DragonFly 1.10.0        2007-08-06 [DFB]
 520 Mac OS X 10.5           2007-10-26 [APL]
 521 OpenBSD 4.2             2007-11-01 [OBD]
 522 NetBSD 4.0              2007-12-19 [NBD]
 523 FreeBSD 6.3             2008-01-18 [FBD]
 524 DragonFly 1.12.0        2008-02-26 [DFB]
 525 FreeBSD 7.0             2008-02-27 [FBD]
 526 OpenBSD 4.3             2008-05-01 [OBD]
 527 DragonFly 2.0.0         2008-07-21 [DFB]
 528 OpenBSD 4.4             2008-11-01 [OBD]
 529 FreeBSD 6.4             2008-11-28 [FBD]
 530 FreeBSD 7.1             2009-01-04 [FBD]
 531 DragonFly 2.2.0         2009-02-17 [DFB]
 532 NetBSD 5.0              2009-04-29 [NBD]
 533 OpenBSD 4.5             2009-05-01 [OBD]
 534 FreeBSD 7.2             2009-05-04 [FBD]
 535 Mac OS X 10.6           2009-06-08 [APL]
 536 DragonFly 2.4.0         2009-09-16 [DFB]
 537 OpenBSD 4.6             2009-10-18 [OBD]
 538 FreeBSD 8.0             2009-11-26 [FBD]
 539 FreeBSD 7.3             2010-03-23 [FBD]
 540 DragonFly 2.6.0         2010-03-28 [DFB]
 541 OpenBSD 4.7             2010-05-19 [OBD]
 542 FreeBSD 8.1             2010-07-24 [FBD]
 543 DragonFly 2.8.2         2010-10-30 [DFB]
 544 OpenBSD 4.8             2010-11-01 [OBD]
 545 NetBSD 5.1              2010-11-19 [NBD]
 546 FreeBSD 7.4             2011-02-24 [FBD]
 547 FreeBSD 8.2             2011-02-24 [FBD]
 548 DragonFly 2.10.1        2011-04-26 [DFB]
 549 OpenBSD 4.9             2011-05-01 [OBD]
 550 Mac OS X 10.7           2011-07-20 [APL]
 551 OpenBSD 5.0             2011-11-01 [OBD]
 552 FreeBSD 9.0             2012-01-12 [FBD]
 553 DragonFly 3.0.1         2012-02-21 [DFB]
 554 FreeBSD 8.3             2012-04-18 [FBD]
 555 OpenBSD 5.1             2012-05-01 [OBD]
 556 Mac OS X 10.8           2012-07-25 [APL]
 557 NetBSD 6.0              2012-10-17 [NBD]
 558 OpenBSD 5.2             2012-11-01 [OBD]
 559 DragonFly 3.2.1         2012-11-02 [DFB]
 560 FreeBSD 9.1             2012-12-30 [FBD]
 561
 562 Bibliography
 563 ------------------------
 564
 565 Leffler, Samuel J., Marshall Kirk McKusick, Michael J Karels and John
 566 Quarterman. The Design and Implementation of the 4.3BSD UNIX Operating
 567 System. Reading, Mass. Addison-Wesley, 1989. ISBN 0-201-06196-1
 568
 569 Salus, Peter H. A quarter century of UNIX. Addison-Wesley Publishing
 570 Company, Inc., 1994. ISBN 0-201-54777-5
 571
 572 McKusick, Marshall Kirk, Keith Bostic, Michael J Karels, and John
 573 Quarterman. The Design and Implementation of the 4.4BSD Operating
 574 System. Reading, Mass. Addison-Wesley, 1996. ISBN 0-201-54979-4
 575
 576 McKusick, Marshall Kirk, George Neville-Neil. The Design and
 577 Implementation of the FreeBSD Operating System.
 578 Addison-Wesley Professional, Published: Aug 2, 2004. ISBN 0-201-70245-2
 579
 580 Doug McIlroy. Research Unix Reader.
 581
 582 Michael G. Brown. The Role of BSD in the Development of Unix.
 583 Presented to the Tasmanian Unix Special Interest Group of the
 584 Australian Computer Society, Hobart, August 1993.
 585
 586 Peter H. Salus. Unix at 25. Byte Magazine, October 1994.
 587 URL: http://www.byte.com/art/9410/sec8/art3.htm
 588
 589 Andreas Klemm, Lars Köller. If you're going to San Francisco ...
 590 Die freien BSD-Varianten von Unix. c't April 1997, page 368ff.
 591
 592 BSD Release Announcements collection.
 593 URL: http://www.FreeBSD.org/releases/
 594
 595 BSD Hypertext Man Pages
 596 URL: http://www.FreeBSD.org/cgi/man.cgi
 597
 598 UNIX history graphing project
 599 URL: http://minnie.tuhs.org/Unix_History/index.html
 600
 601 UNIX history
 602 URL: http://www.levenez.com/unix/
 603
 604 James Howard: The BSD Family Tree
 605 URL: http://ezine.daemonnews.org/200104/bsd_family.html
 606 ("what are the differences between FreeBSD, NetBSD, and OpenBSD?")
 607
 608
 609 Acknowledgments
 610 ---------------
 611
 612 Josh Gilliam for suggestions, bug fixes, and finding very old
 613 original BSD announcements from Usenet or tapes.
 614
 615 Steven M. Schultz for providing 2.8BSD, 2.10BSD, 2.11BSD manual pages.
 616
 617 --
 618 Copyright (c) 1997-2012 Wolfram Schneider <wosch@FreeBSD.ORG>
 619 URL: http://cvsweb.freebsd.org/src/share/misc/bsd-family-tree
 620
 621 $FreeBSD: src/share/misc/bsd-family-tree,v 1.161 2013/03/15 00:53:30 svnexp Exp $