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  |     V              |      |                 |                       |
 233  |                    |      |                 |                       |
 234 FreeBSD 8 -current    |  NetBSD -current  OpenBSD -current             |
 235  |                    |      |                 |                       |
 236  v                    v      v                 v                       v
 237
 238 Time
 239 ----------------
 240
 241 Time tolerance +/- 6 months, depending on which book/article you read; if it
 242 was the announcement in Usenet or if it was available as tape.
 243
 244 [44B] McKusick, Marshall Kirk, Keith Bostic, Michael J Karels,
 245         and John Quarterman. The Design and Implementation of
 246         the 4.4BSD Operating System.
 247 [APL] Apple website [http://www.apple.com/macosx/]
 248 [BSDI] Berkeley Software Design, Inc.
 249 [DFB] DragonFlyBSD Project, The.
 250 [DOC] README, COPYRIGHT on tape.
 251 [FBD] FreeBSD Project, The.
 252 [KB]  Keith Bostic. BSD2.10 available from Usenix. comp.unix.sources,
 253         Volume 11, Info 4, April, 1987.
 254 [KKK] Mike Karels, Kirk McKusick, and Keith Bostic. tahoe announcement.
 255         comp.bugs.4bsd.ucb-fixes, June 15, 1988.
 256 [KSJ] Michael J. Karels, Carl F. Smith, and William F. Jolitz.
 257         Changes in the Kernel in 2.9BSD. Second Berkeley Software
 258         Distribution UNIX Version 2.9, July, 1983.
 259 [NBD] NetBSD Project, The.
 260 [OBD] OpenBSD Project, The.
 261 [QCU] Salus, Peter H. A quarter century of UNIX.
 262 [SMS] Steven M. Schultz. 2.11BSD, UNIX for the PDP-11.
 263 [TUHS] The Unix Historical Society.  http://minnie.tuhs.org/Unix_History/.
 264 [USE] Usenet announcement.
 265 [WRS] Wind River Systems, Inc.
 266 [dmr] Dennis Ritchie, via E-Mail
 267
 268 Multics                 1965
 269 UNIX                    Summer 1969
 270                                 DEC PDP-7
 271 First   Edition         1971-11-03 [QCU]
 272                                 DEC PDP-11/20, Assembler
 273 Second  Edition         1972-06-12 [QCU]
 274                                 10 UNIX installations
 275 Third   Edition         1973-02-xx [QCU]
 276                                 Pipes, 16 installations
 277 Fourth  Edition         1973-11-xx [QCU]
 278                                 rewriting in C effected,
 279                                 above 30 installations
 280 Fifth   Edition         1974-06-xx [QCU]
 281                                 above 50 installations
 282 Sixth   Edition         1975-05-xx [QCU]
 283                                 port to DEC Vax
 284 Seventh Edition         1979-01-xx [QCU]
 285                                 first portable UNIX
 286 Eighth  Edition         1985-02-xx [QCU]
 287                                 VAX 11/750, VAX 11/780 [dmr]
 288                                 descended from 4.1c BSD [dmr]
 289                                 descended from 4.1 BSD [44B]
 290                         scooping-out and replacement of the character-device
 291                         and networking part by the streams mechanism
 292
 293 Ninth   Edition         1986-09-xx [QCU]
 294 Tenth   Edition         1989-10-xx [QCU]
 295
 296 1BSD                    late 1977
 297                         1978-03-09 [QCU]
 298                                 PDP-11, Pascal, ex(1)
 299                                 30 free copies of 1BSD sent out
 300                                 35 tapes sold for 50 USD [QCU]
 301 2BSD                    mid 1978 [QCU] 1979-05-10 [TUHS]
 302                                 75 2BSD tapes shipped
 303 2.79BSD                 1980-04-xx [TUHS]
 304 2.8BSD                  1981-07-xx [KSJ]
 305
 306 2.8.1BSD                1982-01-xx [QCU]
 307                                 set of performance improvements
 308 2.9BSD                  1983-07-xx [KSJ]
 309 2.9.1BSD                1983-11-xx [TUHS]
 310 2.9BSD-Seismo           1985-08-xx [SMS]
 311 2.10BSD                 1987-04-xx [KKK]
 312 2.10.1BSD               1989-01-xx [SMS]
 313 2.11BSD                 1992-02-xx [SMS]
 314 2.11BSD rev #430        1999-12-13 [SMS]
 315
 316 32V                     1978-1[01]-xx [QCU]
 317 3BSD                    late 1979 [QCU] March 1980 [TUHS]
 318                                 virtual memory, page replacement,
 319                                 demand paging
 320 4.0BSD                  1980-10-xx
 321 4.1BSD                  1981-07-08 [DOC]
 322 4.1aBSD                 1982-04-xx
 323                                 alpha release, 100 sites, networking [44B]
 324 4.1bBSD                         internal release, fast filesystem [44B]
 325 4.1cBSD                 late 1982
 326                                 beta release, IPC [44B]
 327 4.2BSD                  1983-09-xx [QCU]
 328                         1983-08-03 [DOC]
 329 4.3BSD                  1986-06-xx [QCU]
 330                         1986-04-05 [KB], [DOC]
 331 4.3BSD Tahoe            1988-06-15 [QCU], [DOC]
 332 4.3BSD NET/1            1988-11-xx [QCU]
 333                         1989-01-01 [DOC]
 334 4.3BSD Reno             1990-06-29 [QCU], [DOC]
 335 4.3BSD NET/2            1991-06-28 [QCU], [DOC]
 336
 337 BSD/386 ALPHA           1991-12-xx [BSDI]
 338                                 first code released to people outside BSDI
 339 386BSD 0.0              1992-02-xx [DOC]
 340 BSD/386 0.3.1           1992-04-xx [BSDI] first ext. beta; B customers
 341 BSD/386 0.3.3           1992-06-xx [BSDI] first CDROM version
 342 386BSD 0.1              1992-07-28 [DOC]
 343 4.4BSD Alpha            1992-07-07
 344 BSD/386 0.9.3           1992-10-xx [BSDI]
 345                                 first external gamma; G customers
 346 BSD/386 0.9.4           1992-12-xx [BSDI]
 347                                 would have been 1.0 except for request
 348                                 for preliminary injunction
 349 BSD/386 1.0             1993-03-xx [BSDI]
 350                                 injunction denied; first official release
 351 NetBSD 0.8              1993-04-20 [NBD]
 352 4.4BSD                  1993-06-01 [USE]
 353 NetBSD 0.9              1993-08-23 [NBD]
 354 FreeBSD 1.0             1993-11-01 [FBD]
 355 FreeBSD 1.0.2           1993-11-14 [FBD]
 356                                 supersedes 1.0 13 days after release.
 357 BSD/386 1.1             1994-02-xx [BSDI]
 358 4.4BSD Lite             1994-03-01 [USE]
 359 FreeBSD 1.1             1994-05-07 [FBD]
 360 FreeBSD 1.1.5           1994-06-30 [FBD]
 361 FreeBSD 1.1.5.1         1994-07-05 [FBD]
 362                                 supersedes 1.1.5 5 days after release.
 363 NetBSD 1.0              1994-10-26 [NBD]
 364 386BSD 1.0              1994-11-12 [USE]
 365 FreeBSD 2.0             1994-11-23 [FBD]
 366 BSD/OS 2.0              1995-01-xx [BSDI] 4.4 lite based
 367 FreeBSD 2.0.5           1995-06-10 [FBD]
 368 BSD/OS 2.0.1            1995-06-xx [BSDI]
 369 4.4BSD Lite Release 2   1995-06-xx [44B]
 370                                 the true final distribution from the CSRG
 371 FreeBSD 2.1.0           1995-11-19 [FBD]
 372 NetBSD 1.1              1995-11-26 [NBD]
 373 BSD/OS 2.1              1996-01-xx [BSDI]
 374 FreeBSD 2.1.5           1996-07-14 [FBD]
 375 NetBSD 1.2              1996-10-04 [NBD]
 376 OpenBSD 2.0             1996-10-18 [OBD]
 377 FreeBSD 2.1.6           1996-11-16 [FBD]
 378 FreeBSD 2.1.6.1         1996-11-25 [FBD] (sendmail security release)
 379 Rhapsody                1997-xx-xx
 380 FreeBSD 2.1.7           1997-02-20 [FBD]
 381 BSD/OS 3.0              1997-02-xx [BSDI] 4.4 lite2 based
 382 FreeBSD 2.2.0           1997-03-16 [FBD]
 383 FreeBSD 2.2.1           1997-03-25 [FBD]
 384 FreeBSD 2.2.2           1997-05-16 [FBD]
 385 NetBSD 1.2.1            1997-05-20 [NBD] (patch release)
 386 OpenBSD 2.1             1997-06-01 [OBD]
 387 FreeBSD 2.2.5           1997-10-22 [FBD]
 388 OpenBSD 2.2             1997-12-01 [OBD]
 389 NetBSD 1.3              1998-01-04 [NBD]
 390 FreeBSD 2.2.6           1998-03-25 [FBD]
 391 NetBSD 1.3.1            1998-03-09 [NBD] (patch release)
 392 BSD/OS 3.1              1998-03-xx [BSDI]
 393 OpenBSD 2.3             1998-05-19 [OBD]
 394 NetBSD 1.3.2            1998-05-29 [NBD] (patch release)
 395 FreeBSD 2.2.7           1998-07-22 [FBD]
 396 BSD/OS 4.0              1998-08-xx [BSDI]
 397                                 2-lock MP support, ELF executables
 398 FreeBSD 3.0             1998-10-16 [FBD]
 399                                 FreeBSD-3.0 is a snapshot from -current,
 400                                 while 3.1 and 3.2 are from 3.x-stable which
 401                                 was branched quite some time after 3.0-release
 402 FreeBSD 2.2.8           1998-11-29 [FBD]
 403 OpenBSD 2.4             1998-12-01 [OBD]
 404 NetBSD 1.3.3            1998-12-23 [NBD] (patch release)
 405 FreeBSD 3.1             1999-02-15 [FBD]
 406 BSD/OS 4.0.1            1999-03-xx [BSDI]
 407 NetBSD 1.4              1999-05-12 [NBD]
 408 FreeBSD 3.2             1999-05-17 [FBD]
 409 OpenBSD 2.5             1999-05-19 [OBD]
 410 NetBSD 1.4.1            1999-08-26 [NBD] (patch release)
 411 FreeBSD 3.3             1999-09-17 [FBD]
 412 OpenBSD 2.6             1999-12-01 [OBD]
 413 FreeBSD 3.4             1999-12-20 [FBD]
 414 BSD/OS 4.1              1999-12-xx [BSDI]
 415 FreeBSD 4.0             2000-03-13 [FBD]
 416 NetBSD 1.4.2            2000-03-19 [NBD] (patch release)
 417 OpenBSD 2.7             2000-06-15 [OBD]
 418 FreeBSD 3.5             2000-06-24 [FBD]
 419 FreeBSD 4.1             2000-07-27 [FBD]
 420 FreeBSD 3.5.1           2000-07-28 [FBD]
 421 FreeBSD 4.1.1           2000-09-25 [FBD] (a network-only patch release)
 422 FreeBSD 4.2             2000-11-21 [FBD]
 423 NetBSD 1.4.3            2000-11-25 [NBD] (patch release)
 424 BSD/OS 4.2              2000-11-29 [BSDI]
 425 OpenBSD 2.8             2000-12-01 [OBD]
 426 NetBSD 1.5              2000-12-06 [NBD]
 427 Mac OS X 10.0           2001-03-24 [APL]
 428 FreeBSD 4.3             2001-04-20 [FBD]
 429 OpenBSD 2.9             2001-06-01 [OBD]
 430 NetBSD 1.5.1            2001-07-11 [NBD] (patch release)
 431 NetBSD 1.5.2            2001-09-13 [NBD] (patch release)
 432 FreeBSD 4.4             2001-09-18 [FBD]
 433 Mac OS X 10.1           2001-09-29 [APL]
 434 OpenBSD 3.0             2001-12-01 [OBD]
 435 FreeBSD 4.5             2002-01-29 [FBD]
 436 BSD/OS 4.3              2002-03-14 [WRS]
 437 OpenBSD 3.1             2002-05-19 [OBD]
 438 FreeBSD 4.6             2002-06-15 [FBD]
 439 NetBSD 1.5.3            2002-07-22 [NBD] (patch release)
 440 FreeBSD 4.6.2           2002-08-15 [FBD] (patch release)
 441 Mac OS X 10.2           2002-08-23 [APL]
 442 NetBSD 1.6              2002-09-14 [NBD]
 443 FreeBSD 4.7             2002-10-08 [FBD]
 444 OpenBSD 3.2             2002-11-01 [OBD]
 445 FreeBSD 5.0             2003-01-17 [FBD]
 446                                 FreeBSD 5.0 is a separate branch off of
 447                                 -current, similar to 3.0.
 448 FreeBSD 4.8             2003-04-03 [FBD]
 449 NetBSD 1.6.1            2003-04-21 [NBD] (patch release)
 450 OpenBSD 3.3             2003-05-01 [OBD]
 451 BSD/OS 5.0              2003-05-?? [WRS]
 452 FreeBSD 5.1             2003-06-09 [FBD]
 453 Mac OS X 10.3           2003-10-24 [APL]
 454 FreeBSD 4.9             2003-10-28 [FBD]
 455 BSD/OS 5.1 ISE          2003-10-?? [WRS] (final version)
 456 OpenBSD 3.4             2003-11-01 [OBD]
 457 FreeBSD 5.2             2004-01-12 [FBD]
 458 FreeBSD 5.2.1           2004-02-22 [FBD] (patch release)
 459 NetBSD 1.6.2            2004-03-01 [NBD] (patch release)
 460 OpenBSD 3.5             2004-04-01 [OBD]
 461 FreeBSD 4.10            2004-05-27 [FBD]
 462 DragonFly 1.0           2004-07-12 [DFB]
 463 OpenBSD 3.6             2004-10-29 [OBD]
 464 FreeBSD 5.3             2004-11-06 [FBD]
 465 NetBSD 2.0              2004-12-09 [NBD]
 466 FreeBSD 4.11            2005-01-25 [FBD]
 467 DragonFly 1.2.0         2005-04-08 [DFB]
 468 NetBSD 2.0.2            2005-04-14 [NBD] (security/critical release)
 469 Mac OS X 10.4           2005-04-29 [APL]
 470 FreeBSD 5.4             2005-05-09 [FBD]
 471 OpenBSD 3.7             2005-05-19 [OBD]
 472 NetBSD 2.0.3            2005-10-31 [NBD] (security/critical release)
 473 OpenBSD 3.8             2005-11-01 [OBD]
 474 FreeBSD 6.0             2005-11-01 [FBD]
 475 NetBSD 2.1              2005-11-02 [NBD]
 476 NetBSD 3.0              2005-12-23 [NBD]
 477 DragonFly 1.4.0         2006-01-08 [DFB]
 478 OpenBSD 3.9             2006-05-01 [OBD]
 479 FreeBSD 6.1             2006-05-08 [FBD]
 480 FreeBSD 5.5             2006-05-25 [FBD]
 481 NetBSD 3.0.1            2006-07-24 [NBD] (security/critical release)
 482 DragonFly 1.6.0         2006-07-24 [DFB]
 483 OpenBSD 4.0             2006-11-01 [OBD]
 484 NetBSD 3.0.2            2006-11-04 [NBD] (security/critical release)
 485 NetBSD 3.1              2006-11-04 [NBD]
 486 FreeBSD 6.2             2007-01-15 [FBD]
 487 DragonFly 1.8.0         2007-01-30 [DFB]
 488 OpenBSD 4.1             2007-05-01 [OBD]
 489 DragonFly 1.10.0        2007-08-06 [DFB]
 490 Mac OS X 10.5           2007-10-26 [APL]
 491 OpenBSD 4.2             2007-11-01 [OBD]
 492 NetBSD 4.0              2007-12-19 [NBD]
 493 FreeBSD 6.3             2008-01-18 [FBD]
 494 DragonFly 1.12.0        2008-02-26 [DFB]
 495 FreeBSD 7.0             2008-02-27 [FBD]
 496 OpenBSD 4.3             2008-05-01 [OBD]
 497 DragonFly 2.0.0         2008-07-21 [DFB]
 498 OpenBSD 4.4             2008-11-01 [OBD]
 499 FreeBSD 6.4             2008-11-28 [FBD]
 500 FreeBSD 7.1             2009-01-04 [FBD]
 501 DragonFly 2.2.0         2009-02-17 [DFB]
 502 NetBSD 5.0              2009-04-29 [NBD]
 503 OpenBSD 4.5             2009-05-01 [OBD]
 504 FreeBSD 7.2             2009-05-04 [FBD]
 505
 506 Bibliography
 507 ------------------------
 508
 509 Leffler, Samuel J., Marshall Kirk McKusick, Michael J Karels and John
 510 Quarterman. The Design and Implementation of the 4.3BSD UNIX Operating
 511 System. Reading, Mass. Addison-Wesley, 1989. ISBN 0-201-06196-1
 512
 513 Salus, Peter H. A quarter century of UNIX. Addison-Wesley Publishing
 514 Company, Inc., 1994. ISBN 0-201-54777-5
 515
 516 McKusick, Marshall Kirk, Keith Bostic, Michael J Karels, and John
 517 Quarterman. The Design and Implementation of the 4.4BSD Operating
 518 System. Reading, Mass. Addison-Wesley, 1996. ISBN 0-201-54979-4
 519
 520 McKusick, Marshall Kirk, George Neville-Neil. The Design and
 521 Implementation of the FreeBSD Operating System.
 522 Addison-Wesley Professional, Published: Aug 2, 2004. ISBN 0-201-70245-2
 523
 524 Doug McIlroy. Research Unix Reader.
 525
 526 Michael G. Brown. The Role of BSD in the Development of Unix.
 527 Presented to the Tasmanian Unix Special Interest Group of the
 528 Australian Computer Society, Hobart, August 1993.
 529
 530 Peter H. Salus. Unix at 25. Byte Magazine, October 1994.
 531 URL: http://www.byte.com/art/9410/sec8/art3.htm
 532
 533 Andreas Klemm, Lars Köller. If you're going to San Francisco ...
 534 Die freien BSD-Varianten von Unix. c't April 1997, page 368ff.
 535
 536 BSD Release Announcements collection.
 537 URL: http://www.de.FreeBSD.org/de/ftp/releases/
 538
 539 BSD Hypertext Man Pages
 540 URL: http://www.FreeBSD.org/cgi/man.cgi
 541
 542 UNIX history graphing project
 543 URL: http://minnie.tuhs.org/Unix_History/index.html
 544
 545 UNIX history
 546 URL: http://www.levenez.com/unix/
 547
 548 James Howard: The BSD Family Tree
 549 URL: http://ezine.daemonnews.org/200104/bsd_family.html
 550 ("what are the differences between FreeBSD, NetBSD, and OpenBSD?")
 551
 552
 553 Acknowledgments
 554 ---------------
 555
 556 Josh Gilliam for suggestions, bug fixes, and finding very old
 557 original BSD announcements from Usenet or tapes.
 558
 559 Steven M. Schultz for providing 2.8BSD, 2.10BSD, 2.11BSD manual pages.
 560
 561 --
 562 Copyright (c) 1997-2007 Wolfram Schneider <wosch@FreeBSD.ORG>
 563 URL: http://cvsweb.freebsd.org/src/share/misc/bsd-family-tree
 564
 565 $FreeBSD: src/share/misc/bsd-family-tree,v 1.130 2009/06/26 07:11:14 imp Exp $