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  |                    |      |            OpenBSD 5.3          DragonFly 3.4.1
 265  |                    |      |                 |                       |
 266  |                    |      |                 |                       |
 267  |                    |      |                 |                       |
 268 FreeBSD 10 -current   |  NetBSD -current  OpenBSD -current             |
 269  |                    |      |                 |                       |
 270  v                    v      v                 v                       v
 271
 272 Time
 273 ----------------
 274
 275 Time tolerance +/- 6 months, depending on which book/article you read; if it
 276 was the announcement in Usenet or if it was available as tape.
 277
 278 [44B] McKusick, Marshall Kirk, Keith Bostic, Michael J Karels,
 279         and John Quarterman. The Design and Implementation of
 280         the 4.4BSD Operating System.
 281 [APL] Apple website [http://www.apple.com/macosx/]
 282 [BSDI] Berkeley Software Design, Inc.
 283 [DFB] DragonFlyBSD Project, The.
 284 [DOC] README, COPYRIGHT on tape.
 285 [FBD] FreeBSD Project, The.
 286 [KB]  Keith Bostic. BSD2.10 available from Usenix. comp.unix.sources,
 287         Volume 11, Info 4, April, 1987.
 288 [KKK] Mike Karels, Kirk McKusick, and Keith Bostic. tahoe announcement.
 289         comp.bugs.4bsd.ucb-fixes, June 15, 1988.
 290 [KSJ] Michael J. Karels, Carl F. Smith, and William F. Jolitz.
 291         Changes in the Kernel in 2.9BSD. Second Berkeley Software
 292         Distribution UNIX Version 2.9, July, 1983.
 293 [NBD] NetBSD Project, The.
 294 [OBD] OpenBSD Project, The.
 295 [QCU] Salus, Peter H. A quarter century of UNIX.
 296 [SMS] Steven M. Schultz. 2.11BSD, UNIX for the PDP-11.
 297 [TUHS] The Unix Historical Society.  http://minnie.tuhs.org/Unix_History/.
 298 [USE] Usenet announcement.
 299 [WRS] Wind River Systems, Inc.
 300 [dmr] Dennis Ritchie, via E-Mail
 301
 302 Multics                 1965
 303 UNIX                    Summer 1969
 304                                 DEC PDP-7
 305 First   Edition         1971-11-03 [QCU]
 306                                 DEC PDP-11/20, Assembler
 307 Second  Edition         1972-06-12 [QCU]
 308                                 10 UNIX installations
 309 Third   Edition         1973-02-xx [QCU]
 310                                 Pipes, 16 installations
 311 Fourth  Edition         1973-11-xx [QCU]
 312                                 rewriting in C effected,
 313                                 above 30 installations
 314 Fifth   Edition         1974-06-xx [QCU]
 315                                 above 50 installations
 316 Sixth   Edition         1975-05-xx [QCU]
 317                                 port to DEC Vax
 318 Seventh Edition         1979-01-xx [QCU]
 319                                 first portable UNIX
 320 Eighth  Edition         1985-02-xx [QCU]
 321                                 VAX 11/750, VAX 11/780 [dmr]
 322                                 descended from 4.1c BSD [dmr]
 323                                 descended from 4.1 BSD [44B]
 324                         scooping-out and replacement of the character-device
 325                         and networking part by the streams mechanism
 326
 327 Ninth   Edition         1986-09-xx [QCU]
 328 Tenth   Edition         1989-10-xx [QCU]
 329
 330 1BSD                    late 1977
 331                         1978-03-09 [QCU]
 332                                 PDP-11, Pascal, ex(1)
 333                                 30 free copies of 1BSD sent out
 334                                 35 tapes sold for 50 USD [QCU]
 335 2BSD                    mid 1978 [QCU] 1979-05-10 [TUHS]
 336                                 75 2BSD tapes shipped
 337 2.79BSD                 1980-04-xx [TUHS]
 338 2.8BSD                  1981-07-xx [KSJ]
 339
 340 2.8.1BSD                1982-01-xx [QCU]
 341                                 set of performance improvements
 342 2.9BSD                  1983-07-xx [KSJ]
 343 2.9.1BSD                1983-11-xx [TUHS]
 344 2.9BSD-Seismo           1985-08-xx [SMS]
 345 2.10BSD                 1987-04-xx [KKK]
 346 2.10.1BSD               1989-01-xx [SMS]
 347 2.11BSD                 1992-02-xx [SMS]
 348 2.11BSD rev #430        1999-12-13 [SMS]
 349
 350 32V                     1978-1[01]-xx [QCU]
 351 3BSD                    late 1979 [QCU] March 1980 [TUHS]
 352                                 virtual memory, page replacement,
 353                                 demand paging
 354 4.0BSD                  1980-10-xx
 355 4.1BSD                  1981-07-08 [DOC]
 356 4.1aBSD                 1982-04-xx
 357                                 alpha release, 100 sites, networking [44B]
 358 4.1bBSD                         internal release, fast filesystem [44B]
 359 4.1cBSD                 late 1982
 360                                 beta release, IPC [44B]
 361 4.2BSD                  1983-09-xx [QCU]
 362                         1983-08-03 [DOC]
 363 4.3BSD                  1986-06-xx [QCU]
 364                         1986-04-05 [KB], [DOC]
 365 4.3BSD Tahoe            1988-06-15 [QCU], [DOC]
 366 4.3BSD NET/1            1988-11-xx [QCU]
 367                         1989-01-01 [DOC]
 368 4.3BSD Reno             1990-06-29 [QCU], [DOC]
 369 4.3BSD NET/2            1991-06-28 [QCU], [DOC]
 370
 371 BSD/386 ALPHA           1991-12-xx [BSDI]
 372                                 first code released to people outside BSDI
 373 386BSD 0.0              1992-02-xx [DOC]
 374 BSD/386 0.3.1           1992-04-xx [BSDI] first ext. beta; B customers
 375 BSD/386 0.3.3           1992-06-xx [BSDI] first CDROM version
 376 386BSD 0.1              1992-07-28 [DOC]
 377 4.4BSD Alpha            1992-07-07
 378 BSD/386 0.9.3           1992-10-xx [BSDI]
 379                                 first external gamma; G customers
 380 BSD/386 0.9.4           1992-12-xx [BSDI]
 381                                 would have been 1.0 except for request
 382                                 for preliminary injunction
 383 BSD/386 1.0             1993-03-xx [BSDI]
 384                                 injunction denied; first official release
 385 NetBSD 0.8              1993-04-20 [NBD]
 386 4.4BSD                  1993-06-01 [USE]
 387 NetBSD 0.9              1993-08-23 [NBD]
 388 FreeBSD 1.0             1993-11-01 [FBD]
 389 FreeBSD 1.0.2           1993-11-14 [FBD]
 390                                 supersedes 1.0 13 days after release.
 391 BSD/386 1.1             1994-02-xx [BSDI]
 392 4.4BSD Lite             1994-03-01 [USE]
 393 FreeBSD 1.1             1994-05-07 [FBD]
 394 FreeBSD 1.1.5           1994-06-30 [FBD]
 395 FreeBSD 1.1.5.1         1994-07-05 [FBD]
 396                                 supersedes 1.1.5 5 days after release.
 397 NetBSD 1.0              1994-10-26 [NBD]
 398 386BSD 1.0              1994-11-12 [USE]
 399 FreeBSD 2.0             1994-11-23 [FBD]
 400 BSD/OS 2.0              1995-01-xx [BSDI] 4.4 lite based
 401 FreeBSD 2.0.5           1995-06-10 [FBD]
 402 BSD/OS 2.0.1            1995-06-xx [BSDI]
 403 4.4BSD Lite Release 2   1995-06-xx [44B]
 404                                 the true final distribution from the CSRG
 405 FreeBSD 2.1.0           1995-11-19 [FBD]
 406 NetBSD 1.1              1995-11-26 [NBD]
 407 BSD/OS 2.1              1996-01-xx [BSDI]
 408 FreeBSD 2.1.5           1996-07-14 [FBD]
 409 NetBSD 1.2              1996-10-04 [NBD]
 410 OpenBSD 2.0             1996-10-18 [OBD]
 411 FreeBSD 2.1.6           1996-11-16 [FBD]
 412 FreeBSD 2.1.6.1         1996-11-25 [FBD] (sendmail security release)
 413 Rhapsody                1997-xx-xx
 414 FreeBSD 2.1.7           1997-02-20 [FBD]
 415 BSD/OS 3.0              1997-02-xx [BSDI] 4.4 lite2 based
 416 FreeBSD 2.2.0           1997-03-16 [FBD]
 417 FreeBSD 2.2.1           1997-03-25 [FBD]
 418 FreeBSD 2.2.2           1997-05-16 [FBD]
 419 NetBSD 1.2.1            1997-05-20 [NBD] (patch release)
 420 OpenBSD 2.1             1997-06-01 [OBD]
 421 FreeBSD 2.2.5           1997-10-22 [FBD]
 422 OpenBSD 2.2             1997-12-01 [OBD]
 423 NetBSD 1.3              1998-01-04 [NBD]
 424 FreeBSD 2.2.6           1998-03-25 [FBD]
 425 NetBSD 1.3.1            1998-03-09 [NBD] (patch release)
 426 BSD/OS 3.1              1998-03-xx [BSDI]
 427 OpenBSD 2.3             1998-05-19 [OBD]
 428 NetBSD 1.3.2            1998-05-29 [NBD] (patch release)
 429 FreeBSD 2.2.7           1998-07-22 [FBD]
 430 BSD/OS 4.0              1998-08-xx [BSDI]
 431                                 2-lock MP support, ELF executables
 432 FreeBSD 3.0             1998-10-16 [FBD]
 433                                 FreeBSD-3.0 is a snapshot from -current,
 434                                 while 3.1 and 3.2 are from 3.x-stable which
 435                                 was branched quite some time after 3.0-release
 436 FreeBSD 2.2.8           1998-11-29 [FBD]
 437 OpenBSD 2.4             1998-12-01 [OBD]
 438 NetBSD 1.3.3            1998-12-23 [NBD] (patch release)
 439 FreeBSD 3.1             1999-02-15 [FBD]
 440 BSD/OS 4.0.1            1999-03-xx [BSDI]
 441 NetBSD 1.4              1999-05-12 [NBD]
 442 FreeBSD 3.2             1999-05-17 [FBD]
 443 OpenBSD 2.5             1999-05-19 [OBD]
 444 NetBSD 1.4.1            1999-08-26 [NBD] (patch release)
 445 FreeBSD 3.3             1999-09-17 [FBD]
 446 OpenBSD 2.6             1999-12-01 [OBD]
 447 FreeBSD 3.4             1999-12-20 [FBD]
 448 BSD/OS 4.1              1999-12-xx [BSDI]
 449 FreeBSD 4.0             2000-03-13 [FBD]
 450 NetBSD 1.4.2            2000-03-19 [NBD] (patch release)
 451 OpenBSD 2.7             2000-06-15 [OBD]
 452 FreeBSD 3.5             2000-06-24 [FBD]
 453 FreeBSD 4.1             2000-07-27 [FBD]
 454 FreeBSD 3.5.1           2000-07-28 [FBD]
 455 FreeBSD 4.1.1           2000-09-25 [FBD] (a network-only patch release)
 456 FreeBSD 4.2             2000-11-21 [FBD]
 457 NetBSD 1.4.3            2000-11-25 [NBD] (patch release)
 458 BSD/OS 4.2              2000-11-29 [BSDI]
 459 OpenBSD 2.8             2000-12-01 [OBD]
 460 NetBSD 1.5              2000-12-06 [NBD]
 461 Mac OS X 10.0           2001-03-24 [APL]
 462 FreeBSD 4.3             2001-04-20 [FBD]
 463 OpenBSD 2.9             2001-06-01 [OBD]
 464 NetBSD 1.5.1            2001-07-11 [NBD] (patch release)
 465 NetBSD 1.5.2            2001-09-13 [NBD] (patch release)
 466 FreeBSD 4.4             2001-09-18 [FBD]
 467 Mac OS X 10.1           2001-09-29 [APL]
 468 OpenBSD 3.0             2001-12-01 [OBD]
 469 FreeBSD 4.5             2002-01-29 [FBD]
 470 BSD/OS 4.3              2002-03-14 [WRS]
 471 OpenBSD 3.1             2002-05-19 [OBD]
 472 FreeBSD 4.6             2002-06-15 [FBD]
 473 NetBSD 1.5.3            2002-07-22 [NBD] (patch release)
 474 FreeBSD 4.6.2           2002-08-15 [FBD] (patch release)
 475 Mac OS X 10.2           2002-08-23 [APL]
 476 NetBSD 1.6              2002-09-14 [NBD]
 477 FreeBSD 4.7             2002-10-08 [FBD]
 478 OpenBSD 3.2             2002-11-01 [OBD]
 479 FreeBSD 5.0             2003-01-17 [FBD]
 480                                 FreeBSD 5.0 is a separate branch off of
 481                                 -current, similar to 3.0.
 482 FreeBSD 4.8             2003-04-03 [FBD]
 483 NetBSD 1.6.1            2003-04-21 [NBD] (patch release)
 484 OpenBSD 3.3             2003-05-01 [OBD]
 485 BSD/OS 5.0              2003-05-?? [WRS]
 486 FreeBSD 5.1             2003-06-09 [FBD]
 487 Mac OS X 10.3           2003-10-24 [APL]
 488 FreeBSD 4.9             2003-10-28 [FBD]
 489 BSD/OS 5.1 ISE          2003-10-?? [WRS] (final version)
 490 OpenBSD 3.4             2003-11-01 [OBD]
 491 FreeBSD 5.2             2004-01-12 [FBD]
 492 FreeBSD 5.2.1           2004-02-22 [FBD] (patch release)
 493 NetBSD 1.6.2            2004-03-01 [NBD] (patch release)
 494 OpenBSD 3.5             2004-04-01 [OBD]
 495 FreeBSD 4.10            2004-05-27 [FBD]
 496 DragonFly 1.0           2004-07-12 [DFB]
 497 OpenBSD 3.6             2004-10-29 [OBD]
 498 FreeBSD 5.3             2004-11-06 [FBD]
 499 NetBSD 2.0              2004-12-09 [NBD]
 500 FreeBSD 4.11            2005-01-25 [FBD]
 501 DragonFly 1.2.0         2005-04-08 [DFB]
 502 NetBSD 2.0.2            2005-04-14 [NBD] (security/critical release)
 503 Mac OS X 10.4           2005-04-29 [APL]
 504 FreeBSD 5.4             2005-05-09 [FBD]
 505 OpenBSD 3.7             2005-05-19 [OBD]
 506 NetBSD 2.0.3            2005-10-31 [NBD] (security/critical release)
 507 OpenBSD 3.8             2005-11-01 [OBD]
 508 FreeBSD 6.0             2005-11-01 [FBD]
 509 NetBSD 2.1              2005-11-02 [NBD]
 510 NetBSD 3.0              2005-12-23 [NBD]
 511 DragonFly 1.4.0         2006-01-08 [DFB]
 512 OpenBSD 3.9             2006-05-01 [OBD]
 513 FreeBSD 6.1             2006-05-08 [FBD]
 514 FreeBSD 5.5             2006-05-25 [FBD]
 515 NetBSD 3.0.1            2006-07-24 [NBD] (security/critical release)
 516 DragonFly 1.6.0         2006-07-24 [DFB]
 517 OpenBSD 4.0             2006-11-01 [OBD]
 518 NetBSD 3.0.2            2006-11-04 [NBD] (security/critical release)
 519 NetBSD 3.1              2006-11-04 [NBD]
 520 FreeBSD 6.2             2007-01-15 [FBD]
 521 DragonFly 1.8.0         2007-01-30 [DFB]
 522 OpenBSD 4.1             2007-05-01 [OBD]
 523 DragonFly 1.10.0        2007-08-06 [DFB]
 524 Mac OS X 10.5           2007-10-26 [APL]
 525 OpenBSD 4.2             2007-11-01 [OBD]
 526 NetBSD 4.0              2007-12-19 [NBD]
 527 FreeBSD 6.3             2008-01-18 [FBD]
 528 DragonFly 1.12.0        2008-02-26 [DFB]
 529 FreeBSD 7.0             2008-02-27 [FBD]
 530 OpenBSD 4.3             2008-05-01 [OBD]
 531 DragonFly 2.0.0         2008-07-21 [DFB]
 532 OpenBSD 4.4             2008-11-01 [OBD]
 533 FreeBSD 6.4             2008-11-28 [FBD]
 534 FreeBSD 7.1             2009-01-04 [FBD]
 535 DragonFly 2.2.0         2009-02-17 [DFB]
 536 NetBSD 5.0              2009-04-29 [NBD]
 537 OpenBSD 4.5             2009-05-01 [OBD]
 538 FreeBSD 7.2             2009-05-04 [FBD]
 539 Mac OS X 10.6           2009-06-08 [APL]
 540 DragonFly 2.4.0         2009-09-16 [DFB]
 541 OpenBSD 4.6             2009-10-18 [OBD]
 542 FreeBSD 8.0             2009-11-26 [FBD]
 543 FreeBSD 7.3             2010-03-23 [FBD]
 544 DragonFly 2.6.0         2010-03-28 [DFB]
 545 OpenBSD 4.7             2010-05-19 [OBD]
 546 FreeBSD 8.1             2010-07-24 [FBD]
 547 DragonFly 2.8.2         2010-10-30 [DFB]
 548 OpenBSD 4.8             2010-11-01 [OBD]
 549 NetBSD 5.1              2010-11-19 [NBD]
 550 FreeBSD 7.4             2011-02-24 [FBD]
 551 FreeBSD 8.2             2011-02-24 [FBD]
 552 DragonFly 2.10.1        2011-04-26 [DFB]
 553 OpenBSD 4.9             2011-05-01 [OBD]
 554 Mac OS X 10.7           2011-07-20 [APL]
 555 OpenBSD 5.0             2011-11-01 [OBD]
 556 FreeBSD 9.0             2012-01-12 [FBD]
 557 DragonFly 3.0.1         2012-02-21 [DFB]
 558 FreeBSD 8.3             2012-04-18 [FBD]
 559 OpenBSD 5.1             2012-05-01 [OBD]
 560 Mac OS X 10.8           2012-07-25 [APL]
 561 NetBSD 6.0              2012-10-17 [NBD]
 562 OpenBSD 5.2             2012-11-01 [OBD]
 563 DragonFly 3.2.1         2012-11-02 [DFB]
 564 FreeBSD 9.1             2012-12-30 [FBD]
 565 DragonFly 3.4.1         2013-04-29 [DFB]
 566 OpenBSD 5.3             2013-05-01 [OBD]
 567
 568 Bibliography
 569 ------------------------
 570
 571 Leffler, Samuel J., Marshall Kirk McKusick, Michael J Karels and John
 572 Quarterman. The Design and Implementation of the 4.3BSD UNIX Operating
 573 System. Reading, Mass. Addison-Wesley, 1989. ISBN 0-201-06196-1
 574
 575 Salus, Peter H. A quarter century of UNIX. Addison-Wesley Publishing
 576 Company, Inc., 1994. ISBN 0-201-54777-5
 577
 578 McKusick, Marshall Kirk, Keith Bostic, Michael J Karels, and John
 579 Quarterman. The Design and Implementation of the 4.4BSD Operating
 580 System. Reading, Mass. Addison-Wesley, 1996. ISBN 0-201-54979-4
 581
 582 McKusick, Marshall Kirk, George Neville-Neil. The Design and
 583 Implementation of the FreeBSD Operating System.
 584 Addison-Wesley Professional, Published: Aug 2, 2004. ISBN 0-201-70245-2
 585
 586 Doug McIlroy. Research Unix Reader.
 587
 588 Michael G. Brown. The Role of BSD in the Development of Unix.
 589 Presented to the Tasmanian Unix Special Interest Group of the
 590 Australian Computer Society, Hobart, August 1993.
 591
 592 Peter H. Salus. Unix at 25. Byte Magazine, October 1994.
 593 URL: http://www.byte.com/art/9410/sec8/art3.htm
 594
 595 Andreas Klemm, Lars Köller. If you're going to San Francisco ...
 596 Die freien BSD-Varianten von Unix. c't April 1997, page 368ff.
 597
 598 BSD Release Announcements collection.
 599 URL: http://www.FreeBSD.org/releases/
 600
 601 BSD Hypertext Man Pages
 602 URL: http://www.FreeBSD.org/cgi/man.cgi
 603
 604 UNIX history graphing project
 605 URL: http://minnie.tuhs.org/Unix_History/index.html
 606
 607 UNIX history
 608 URL: http://www.levenez.com/unix/
 609
 610 James Howard: The BSD Family Tree
 611 URL: http://ezine.daemonnews.org/200104/bsd_family.html
 612 ("what are the differences between FreeBSD, NetBSD, and OpenBSD?")
 613
 614
 615 Acknowledgments
 616 ---------------
 617
 618 Josh Gilliam for suggestions, bug fixes, and finding very old
 619 original BSD announcements from Usenet or tapes.
 620
 621 Steven M. Schultz for providing 2.8BSD, 2.10BSD, 2.11BSD manual pages.
 622
 623 --
 624 Copyright (c) 1997-2012 Wolfram Schneider <wosch@FreeBSD.ORG>
 625 URL: http://cvsweb.freebsd.org/src/share/misc/bsd-family-tree
 626
 627 $FreeBSD: src/share/misc/bsd-family-tree,v 1.163 2013/05/02 00:38:57 svnexp Exp $