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  |              |     |      |    |            |                DragonFly 2.4.0
 233  |              |     |      |    |        OpenBSD 4.6                 |
 234  |              |     |      |    |            |                       |
 235  *--FreeBSD     |     |      |    |            |                       |
 236  |    8.0       |     |      |    |            |                       |
 237  |     |    FreeBSD   |      |    |            |                       |
 238  |     |       7.3    |      |    |            |                DragonFly 2.6.0
 239  |     |              |      |    |        OpenBSD 4.7                 |
 240  |  FreeBSD           |      |    |            |                       |
 241  |    8.1             |      |    |            |                       |
 242  |     |              |      |    |            |                DragonFly 2.8.2
 243  |     |              |      |    |        OpenBSD 4.8                 |
 244  |     V              |      | NetBSD 5.1      |                       |
 245  |                    |      |                 |                       |
 246 FreeBSD 9 -current    |  NetBSD -current  OpenBSD -current             |
 247  |                    |      |                 |                       |
 248  v                    v      v                 v                       v
 249
 250 Time
 251 ----------------
 252
 253 Time tolerance +/- 6 months, depending on which book/article you read; if it
 254 was the announcement in Usenet or if it was available as tape.
 255
 256 [44B] McKusick, Marshall Kirk, Keith Bostic, Michael J Karels,
 257         and John Quarterman. The Design and Implementation of
 258         the 4.4BSD Operating System.
 259 [APL] Apple website [http://www.apple.com/macosx/]
 260 [BSDI] Berkeley Software Design, Inc.
 261 [DFB] DragonFlyBSD Project, The.
 262 [DOC] README, COPYRIGHT on tape.
 263 [FBD] FreeBSD Project, The.
 264 [KB]  Keith Bostic. BSD2.10 available from Usenix. comp.unix.sources,
 265         Volume 11, Info 4, April, 1987.
 266 [KKK] Mike Karels, Kirk McKusick, and Keith Bostic. tahoe announcement.
 267         comp.bugs.4bsd.ucb-fixes, June 15, 1988.
 268 [KSJ] Michael J. Karels, Carl F. Smith, and William F. Jolitz.
 269         Changes in the Kernel in 2.9BSD. Second Berkeley Software
 270         Distribution UNIX Version 2.9, July, 1983.
 271 [NBD] NetBSD Project, The.
 272 [OBD] OpenBSD Project, The.
 273 [QCU] Salus, Peter H. A quarter century of UNIX.
 274 [SMS] Steven M. Schultz. 2.11BSD, UNIX for the PDP-11.
 275 [TUHS] The Unix Historical Society.  http://minnie.tuhs.org/Unix_History/.
 276 [USE] Usenet announcement.
 277 [WRS] Wind River Systems, Inc.
 278 [dmr] Dennis Ritchie, via E-Mail
 279
 280 Multics                 1965
 281 UNIX                    Summer 1969
 282                                 DEC PDP-7
 283 First   Edition         1971-11-03 [QCU]
 284                                 DEC PDP-11/20, Assembler
 285 Second  Edition         1972-06-12 [QCU]
 286                                 10 UNIX installations
 287 Third   Edition         1973-02-xx [QCU]
 288                                 Pipes, 16 installations
 289 Fourth  Edition         1973-11-xx [QCU]
 290                                 rewriting in C effected,
 291                                 above 30 installations
 292 Fifth   Edition         1974-06-xx [QCU]
 293                                 above 50 installations
 294 Sixth   Edition         1975-05-xx [QCU]
 295                                 port to DEC Vax
 296 Seventh Edition         1979-01-xx [QCU]
 297                                 first portable UNIX
 298 Eighth  Edition         1985-02-xx [QCU]
 299                                 VAX 11/750, VAX 11/780 [dmr]
 300                                 descended from 4.1c BSD [dmr]
 301                                 descended from 4.1 BSD [44B]
 302                         scooping-out and replacement of the character-device
 303                         and networking part by the streams mechanism
 304
 305 Ninth   Edition         1986-09-xx [QCU]
 306 Tenth   Edition         1989-10-xx [QCU]
 307
 308 1BSD                    late 1977
 309                         1978-03-09 [QCU]
 310                                 PDP-11, Pascal, ex(1)
 311                                 30 free copies of 1BSD sent out
 312                                 35 tapes sold for 50 USD [QCU]
 313 2BSD                    mid 1978 [QCU] 1979-05-10 [TUHS]
 314                                 75 2BSD tapes shipped
 315 2.79BSD                 1980-04-xx [TUHS]
 316 2.8BSD                  1981-07-xx [KSJ]
 317
 318 2.8.1BSD                1982-01-xx [QCU]
 319                                 set of performance improvements
 320 2.9BSD                  1983-07-xx [KSJ]
 321 2.9.1BSD                1983-11-xx [TUHS]
 322 2.9BSD-Seismo           1985-08-xx [SMS]
 323 2.10BSD                 1987-04-xx [KKK]
 324 2.10.1BSD               1989-01-xx [SMS]
 325 2.11BSD                 1992-02-xx [SMS]
 326 2.11BSD rev #430        1999-12-13 [SMS]
 327
 328 32V                     1978-1[01]-xx [QCU]
 329 3BSD                    late 1979 [QCU] March 1980 [TUHS]
 330                                 virtual memory, page replacement,
 331                                 demand paging
 332 4.0BSD                  1980-10-xx
 333 4.1BSD                  1981-07-08 [DOC]
 334 4.1aBSD                 1982-04-xx
 335                                 alpha release, 100 sites, networking [44B]
 336 4.1bBSD                         internal release, fast filesystem [44B]
 337 4.1cBSD                 late 1982
 338                                 beta release, IPC [44B]
 339 4.2BSD                  1983-09-xx [QCU]
 340                         1983-08-03 [DOC]
 341 4.3BSD                  1986-06-xx [QCU]
 342                         1986-04-05 [KB], [DOC]
 343 4.3BSD Tahoe            1988-06-15 [QCU], [DOC]
 344 4.3BSD NET/1            1988-11-xx [QCU]
 345                         1989-01-01 [DOC]
 346 4.3BSD Reno             1990-06-29 [QCU], [DOC]
 347 4.3BSD NET/2            1991-06-28 [QCU], [DOC]
 348
 349 BSD/386 ALPHA           1991-12-xx [BSDI]
 350                                 first code released to people outside BSDI
 351 386BSD 0.0              1992-02-xx [DOC]
 352 BSD/386 0.3.1           1992-04-xx [BSDI] first ext. beta; B customers
 353 BSD/386 0.3.3           1992-06-xx [BSDI] first CDROM version
 354 386BSD 0.1              1992-07-28 [DOC]
 355 4.4BSD Alpha            1992-07-07
 356 BSD/386 0.9.3           1992-10-xx [BSDI]
 357                                 first external gamma; G customers
 358 BSD/386 0.9.4           1992-12-xx [BSDI]
 359                                 would have been 1.0 except for request
 360                                 for preliminary injunction
 361 BSD/386 1.0             1993-03-xx [BSDI]
 362                                 injunction denied; first official release
 363 NetBSD 0.8              1993-04-20 [NBD]
 364 4.4BSD                  1993-06-01 [USE]
 365 NetBSD 0.9              1993-08-23 [NBD]
 366 FreeBSD 1.0             1993-11-01 [FBD]
 367 FreeBSD 1.0.2           1993-11-14 [FBD]
 368                                 supersedes 1.0 13 days after release.
 369 BSD/386 1.1             1994-02-xx [BSDI]
 370 4.4BSD Lite             1994-03-01 [USE]
 371 FreeBSD 1.1             1994-05-07 [FBD]
 372 FreeBSD 1.1.5           1994-06-30 [FBD]
 373 FreeBSD 1.1.5.1         1994-07-05 [FBD]
 374                                 supersedes 1.1.5 5 days after release.
 375 NetBSD 1.0              1994-10-26 [NBD]
 376 386BSD 1.0              1994-11-12 [USE]
 377 FreeBSD 2.0             1994-11-23 [FBD]
 378 BSD/OS 2.0              1995-01-xx [BSDI] 4.4 lite based
 379 FreeBSD 2.0.5           1995-06-10 [FBD]
 380 BSD/OS 2.0.1            1995-06-xx [BSDI]
 381 4.4BSD Lite Release 2   1995-06-xx [44B]
 382                                 the true final distribution from the CSRG
 383 FreeBSD 2.1.0           1995-11-19 [FBD]
 384 NetBSD 1.1              1995-11-26 [NBD]
 385 BSD/OS 2.1              1996-01-xx [BSDI]
 386 FreeBSD 2.1.5           1996-07-14 [FBD]
 387 NetBSD 1.2              1996-10-04 [NBD]
 388 OpenBSD 2.0             1996-10-18 [OBD]
 389 FreeBSD 2.1.6           1996-11-16 [FBD]
 390 FreeBSD 2.1.6.1         1996-11-25 [FBD] (sendmail security release)
 391 Rhapsody                1997-xx-xx
 392 FreeBSD 2.1.7           1997-02-20 [FBD]
 393 BSD/OS 3.0              1997-02-xx [BSDI] 4.4 lite2 based
 394 FreeBSD 2.2.0           1997-03-16 [FBD]
 395 FreeBSD 2.2.1           1997-03-25 [FBD]
 396 FreeBSD 2.2.2           1997-05-16 [FBD]
 397 NetBSD 1.2.1            1997-05-20 [NBD] (patch release)
 398 OpenBSD 2.1             1997-06-01 [OBD]
 399 FreeBSD 2.2.5           1997-10-22 [FBD]
 400 OpenBSD 2.2             1997-12-01 [OBD]
 401 NetBSD 1.3              1998-01-04 [NBD]
 402 FreeBSD 2.2.6           1998-03-25 [FBD]
 403 NetBSD 1.3.1            1998-03-09 [NBD] (patch release)
 404 BSD/OS 3.1              1998-03-xx [BSDI]
 405 OpenBSD 2.3             1998-05-19 [OBD]
 406 NetBSD 1.3.2            1998-05-29 [NBD] (patch release)
 407 FreeBSD 2.2.7           1998-07-22 [FBD]
 408 BSD/OS 4.0              1998-08-xx [BSDI]
 409                                 2-lock MP support, ELF executables
 410 FreeBSD 3.0             1998-10-16 [FBD]
 411                                 FreeBSD-3.0 is a snapshot from -current,
 412                                 while 3.1 and 3.2 are from 3.x-stable which
 413                                 was branched quite some time after 3.0-release
 414 FreeBSD 2.2.8           1998-11-29 [FBD]
 415 OpenBSD 2.4             1998-12-01 [OBD]
 416 NetBSD 1.3.3            1998-12-23 [NBD] (patch release)
 417 FreeBSD 3.1             1999-02-15 [FBD]
 418 BSD/OS 4.0.1            1999-03-xx [BSDI]
 419 NetBSD 1.4              1999-05-12 [NBD]
 420 FreeBSD 3.2             1999-05-17 [FBD]
 421 OpenBSD 2.5             1999-05-19 [OBD]
 422 NetBSD 1.4.1            1999-08-26 [NBD] (patch release)
 423 FreeBSD 3.3             1999-09-17 [FBD]
 424 OpenBSD 2.6             1999-12-01 [OBD]
 425 FreeBSD 3.4             1999-12-20 [FBD]
 426 BSD/OS 4.1              1999-12-xx [BSDI]
 427 FreeBSD 4.0             2000-03-13 [FBD]
 428 NetBSD 1.4.2            2000-03-19 [NBD] (patch release)
 429 OpenBSD 2.7             2000-06-15 [OBD]
 430 FreeBSD 3.5             2000-06-24 [FBD]
 431 FreeBSD 4.1             2000-07-27 [FBD]
 432 FreeBSD 3.5.1           2000-07-28 [FBD]
 433 FreeBSD 4.1.1           2000-09-25 [FBD] (a network-only patch release)
 434 FreeBSD 4.2             2000-11-21 [FBD]
 435 NetBSD 1.4.3            2000-11-25 [NBD] (patch release)
 436 BSD/OS 4.2              2000-11-29 [BSDI]
 437 OpenBSD 2.8             2000-12-01 [OBD]
 438 NetBSD 1.5              2000-12-06 [NBD]
 439 Mac OS X 10.0           2001-03-24 [APL]
 440 FreeBSD 4.3             2001-04-20 [FBD]
 441 OpenBSD 2.9             2001-06-01 [OBD]
 442 NetBSD 1.5.1            2001-07-11 [NBD] (patch release)
 443 NetBSD 1.5.2            2001-09-13 [NBD] (patch release)
 444 FreeBSD 4.4             2001-09-18 [FBD]
 445 Mac OS X 10.1           2001-09-29 [APL]
 446 OpenBSD 3.0             2001-12-01 [OBD]
 447 FreeBSD 4.5             2002-01-29 [FBD]
 448 BSD/OS 4.3              2002-03-14 [WRS]
 449 OpenBSD 3.1             2002-05-19 [OBD]
 450 FreeBSD 4.6             2002-06-15 [FBD]
 451 NetBSD 1.5.3            2002-07-22 [NBD] (patch release)
 452 FreeBSD 4.6.2           2002-08-15 [FBD] (patch release)
 453 Mac OS X 10.2           2002-08-23 [APL]
 454 NetBSD 1.6              2002-09-14 [NBD]
 455 FreeBSD 4.7             2002-10-08 [FBD]
 456 OpenBSD 3.2             2002-11-01 [OBD]
 457 FreeBSD 5.0             2003-01-17 [FBD]
 458                                 FreeBSD 5.0 is a separate branch off of
 459                                 -current, similar to 3.0.
 460 FreeBSD 4.8             2003-04-03 [FBD]
 461 NetBSD 1.6.1            2003-04-21 [NBD] (patch release)
 462 OpenBSD 3.3             2003-05-01 [OBD]
 463 BSD/OS 5.0              2003-05-?? [WRS]
 464 FreeBSD 5.1             2003-06-09 [FBD]
 465 Mac OS X 10.3           2003-10-24 [APL]
 466 FreeBSD 4.9             2003-10-28 [FBD]
 467 BSD/OS 5.1 ISE          2003-10-?? [WRS] (final version)
 468 OpenBSD 3.4             2003-11-01 [OBD]
 469 FreeBSD 5.2             2004-01-12 [FBD]
 470 FreeBSD 5.2.1           2004-02-22 [FBD] (patch release)
 471 NetBSD 1.6.2            2004-03-01 [NBD] (patch release)
 472 OpenBSD 3.5             2004-04-01 [OBD]
 473 FreeBSD 4.10            2004-05-27 [FBD]
 474 DragonFly 1.0           2004-07-12 [DFB]
 475 OpenBSD 3.6             2004-10-29 [OBD]
 476 FreeBSD 5.3             2004-11-06 [FBD]
 477 NetBSD 2.0              2004-12-09 [NBD]
 478 FreeBSD 4.11            2005-01-25 [FBD]
 479 DragonFly 1.2.0         2005-04-08 [DFB]
 480 NetBSD 2.0.2            2005-04-14 [NBD] (security/critical release)
 481 Mac OS X 10.4           2005-04-29 [APL]
 482 FreeBSD 5.4             2005-05-09 [FBD]
 483 OpenBSD 3.7             2005-05-19 [OBD]
 484 NetBSD 2.0.3            2005-10-31 [NBD] (security/critical release)
 485 OpenBSD 3.8             2005-11-01 [OBD]
 486 FreeBSD 6.0             2005-11-01 [FBD]
 487 NetBSD 2.1              2005-11-02 [NBD]
 488 NetBSD 3.0              2005-12-23 [NBD]
 489 DragonFly 1.4.0         2006-01-08 [DFB]
 490 OpenBSD 3.9             2006-05-01 [OBD]
 491 FreeBSD 6.1             2006-05-08 [FBD]
 492 FreeBSD 5.5             2006-05-25 [FBD]
 493 NetBSD 3.0.1            2006-07-24 [NBD] (security/critical release)
 494 DragonFly 1.6.0         2006-07-24 [DFB]
 495 OpenBSD 4.0             2006-11-01 [OBD]
 496 NetBSD 3.0.2            2006-11-04 [NBD] (security/critical release)
 497 NetBSD 3.1              2006-11-04 [NBD]
 498 FreeBSD 6.2             2007-01-15 [FBD]
 499 DragonFly 1.8.0         2007-01-30 [DFB]
 500 OpenBSD 4.1             2007-05-01 [OBD]
 501 DragonFly 1.10.0        2007-08-06 [DFB]
 502 Mac OS X 10.5           2007-10-26 [APL]
 503 OpenBSD 4.2             2007-11-01 [OBD]
 504 NetBSD 4.0              2007-12-19 [NBD]
 505 FreeBSD 6.3             2008-01-18 [FBD]
 506 DragonFly 1.12.0        2008-02-26 [DFB]
 507 FreeBSD 7.0             2008-02-27 [FBD]
 508 OpenBSD 4.3             2008-05-01 [OBD]
 509 DragonFly 2.0.0         2008-07-21 [DFB]
 510 OpenBSD 4.4             2008-11-01 [OBD]
 511 FreeBSD 6.4             2008-11-28 [FBD]
 512 FreeBSD 7.1             2009-01-04 [FBD]
 513 DragonFly 2.2.0         2009-02-17 [DFB]
 514 NetBSD 5.0              2009-04-29 [NBD]
 515 OpenBSD 4.5             2009-05-01 [OBD]
 516 FreeBSD 7.2             2009-05-04 [FBD]
 517 DragonFly 2.4.0         2009-09-16 [DFB]
 518 OpenBSD 4.6             2009-10-18 [OBD]
 519 FreeBSD 8.0             2009-11-26 [FBD]
 520 FreeBSD 7.3             2010-03-23 [FBD]
 521 DragonFly 2.6.0         2010-03-28 [DFB]
 522 OpenBSD 4.7             2010-05-19 [OBD]
 523 FreeBSD 8.1             2010-07-24 [FBD]
 524 DragonFly 2.8.2         2010-10-30 [DFB]
 525 OpenBSD 4.8             2010-11-01 [OBD]
 526 NetBSD 5.1              2010-11-19 [NBD]
 527
 528 Bibliography
 529 ------------------------
 530
 531 Leffler, Samuel J., Marshall Kirk McKusick, Michael J Karels and John
 532 Quarterman. The Design and Implementation of the 4.3BSD UNIX Operating
 533 System. Reading, Mass. Addison-Wesley, 1989. ISBN 0-201-06196-1
 534
 535 Salus, Peter H. A quarter century of UNIX. Addison-Wesley Publishing
 536 Company, Inc., 1994. ISBN 0-201-54777-5
 537
 538 McKusick, Marshall Kirk, Keith Bostic, Michael J Karels, and John
 539 Quarterman. The Design and Implementation of the 4.4BSD Operating
 540 System. Reading, Mass. Addison-Wesley, 1996. ISBN 0-201-54979-4
 541
 542 McKusick, Marshall Kirk, George Neville-Neil. The Design and
 543 Implementation of the FreeBSD Operating System.
 544 Addison-Wesley Professional, Published: Aug 2, 2004. ISBN 0-201-70245-2
 545
 546 Doug McIlroy. Research Unix Reader.
 547
 548 Michael G. Brown. The Role of BSD in the Development of Unix.
 549 Presented to the Tasmanian Unix Special Interest Group of the
 550 Australian Computer Society, Hobart, August 1993.
 551
 552 Peter H. Salus. Unix at 25. Byte Magazine, October 1994.
 553 URL: http://www.byte.com/art/9410/sec8/art3.htm
 554
 555 Andreas Klemm, Lars Köller. If you're going to San Francisco ...
 556 Die freien BSD-Varianten von Unix. c't April 1997, page 368ff.
 557
 558 BSD Release Announcements collection.
 559 URL: http://www.FreeBSD.org/releases/
 560
 561 BSD Hypertext Man Pages
 562 URL: http://www.FreeBSD.org/cgi/man.cgi
 563
 564 UNIX history graphing project
 565 URL: http://minnie.tuhs.org/Unix_History/index.html
 566
 567 UNIX history
 568 URL: http://www.levenez.com/unix/
 569
 570 James Howard: The BSD Family Tree
 571 URL: http://ezine.daemonnews.org/200104/bsd_family.html
 572 ("what are the differences between FreeBSD, NetBSD, and OpenBSD?")
 573
 574
 575 Acknowledgments
 576 ---------------
 577
 578 Josh Gilliam for suggestions, bug fixes, and finding very old
 579 original BSD announcements from Usenet or tapes.
 580
 581 Steven M. Schultz for providing 2.8BSD, 2.10BSD, 2.11BSD manual pages.
 582
 583 --
 584 Copyright (c) 1997-2007 Wolfram Schneider <wosch@FreeBSD.ORG>
 585 URL: http://cvsweb.freebsd.org/src/share/misc/bsd-family-tree
 586
 587 $FreeBSD: src/share/misc/bsd-family-tree,v 1.142 2011/01/19 10:30:49 maxim Exp $