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               2.7.9BSD
  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  |      v           `-|------|-----------------|---------------------.
 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  |   FreeBSD 5.4     10.4    | |  |            |                       |
 191  |      |             |      | |  |        OpenBSD 3.7                 |
 192  |      V             |      | | NetBSD 2.0.3  |                       |
 193  |                    |      | |  |            |                       |
 194  *---FreeBSD 6.0      |      | |  v        OpenBSD 3.8                 |
 195  |      |             |      | |               |                       |
 196  |      |             |      |  \              |                       |
 197  |      |             |      | NetBSD 2.1      |                       |
 198  |      |             |      |                 |                       |
 199  |      |             |   NetBSD 3.0           |                       |
 200  |      |             |      |                 |                 DragonFly 1.4.0
 201  |      |             |      |             OpenBSD 3.9                 |
 202  |   FreeBSD 6.1      |      |                 |                       |
 203  |      |             |      |                 |                       |
 204  |      V             |      |                 |                       |
 205 FreeBSD 7 -current    |  NetBSD -current  OpenBSD -current             |
 206  |                    |      |                 |                       |
 207  v                    v      v                 v                       v
 208
 209 Time
 210 ----------------
 211
 212 Time tolerance +/- 6 months, depending on which book/article you read; if it
 213 was the announcement in Usenet or if it was available as tape.
 214
 215 [44B] McKusick, Marshall Kirk, Keith Bostic, Michael J Karels,
 216         and John Quarterman. The Design and Implementation of
 217         the 4.4BSD Operating System.
 218 [APL] Apple website [http://www.apple.com/macosx/]
 219 [BSDI] Berkeley Software Design, Inc.
 220 [DFB] DragonFlyBSD Project, The.
 221 [DOC] README, COPYRIGHT on tape.
 222 [FBD] FreeBSD Project, The.
 223 [KB]  Keith Bostic. BSD2.10 available from Usenix. comp.unix.sources,
 224         Volume 11, Info 4, April, 1987.
 225 [KKK] Mike Karels, Kirk McKusick, and Keith Bostic. tahoe announcement.
 226         comp.bugs.4bsd.ucb-fixes, June 15, 1988.
 227 [KSJ] Michael J. Karels, Carl F. Smith, and William F. Jolitz.
 228         Changes in the Kernel in 2.9BSD. Second Berkeley Software
 229         Distribution UNIX Version 2.9, July, 1983.
 230 [NBD] NetBSD Project, The.
 231 [OBD] OpenBSD Project, The.
 232 [QCU] Salus, Peter H. A quarter century of UNIX.
 233 [SMS] Steven M. Schultz. 2.11BSD, UNIX for the PDP-11.
 234 [USE] Usenet announcement.
 235 [WRS] Wind River Systems, Inc.
 236 [dmr] Dennis Ritchie, via E-Mail
 237
 238 Multics                 1965
 239 UNIX                    Summer 1969
 240                                 DEC PDP-7
 241 First   Edition         1971-11-03 [QCU]
 242                                 DEC PDP-11/20, Assembler
 243 Second  Edition         1972-06-12 [QCU]
 244                                 10 UNIX installations
 245 Third   Edition         1973-02-xx [QCU]
 246                                 Pipes, 16 installations
 247 Fourth  Edition         1973-11-xx [QCU]
 248                                 rewriting in C effected,
 249                                 above 30 installations
 250 Fifth   Edition         1974-06-xx [QCU]
 251                                 above 50 installations
 252 Sixth   Edition         1975-05-xx [QCU]
 253                                 port to DEC Vax
 254 Seventh Edition         1979-01-xx [QCU]
 255                                 first portable UNIX
 256 Eighth  Edition         1985-02-xx [QCU]
 257                                 VAX 11/750, VAX 11/780 [dmr]
 258                                 descended from 4.1c BSD [dmr]
 259                                 descended from 4.1 BSD [44B]
 260                         scooping-out and replacement of the character-device
 261                         and networking part by the streams mechanism
 262
 263 Ninth   Edition         1986-09-xx [QCU]
 264 Tenth   Edition         1989-10-xx [QCU]
 265
 266 1BSD                    late 1977
 267                         1978-03-09 [QCU]
 268                                 PDP-11, Pascal, ex(1)
 269                                 30 free copies of 1BSD sent out
 270                                 35 tapes sold for 50 USD [QCU]
 271 2BSD                    mid 1978 [QCU]
 272                                 75 2BSD tapes shipped
 273 2.7.9BSD                ?? [SMS]
 274 2.8BSD                  1981-07-xx [KSJ]
 275
 276 2.8.1BSD                1982-01-xx [QCU]
 277                                 set of performance improvements
 278 2.9BSD                  1983-07-xx [KSJ]
 279 2.9.1BSD                1983-11-xx
 280 2.9BSD-Seismo           1985-08-xx [SMS]
 281 2.10BSD                 1987-04-xx [KKK]
 282 2.10.1BSD               1989-01-xx [SMS]
 283 2.11BSD                 1992-02-xx [SMS]
 284 2.11BSD rev #430        1999-12-13 [SMS]
 285
 286 32V                     1978-1[01]-xx [QCU]
 287 3BSD                    late 1979 [QCU]
 288                                 virtual memory, page replacement,
 289                                 demand paging
 290 4.0BSD                  1980-10-xx
 291 4.1BSD                  1981-07-08 [DOC]
 292 4.1aBSD                 1982-04-xx
 293                                 alpha release, 100 sites, networking [44B]
 294 4.1bBSD                         internal release, fast filesystem [44B]
 295 4.1cBSD                 late 1982
 296                                 beta release, IPC [44B]
 297 4.2BSD                  1983-09-xx [QCU]
 298                         1983-08-03 [DOC]
 299 4.3BSD                  1986-06-xx [QCU]
 300                         1986-04-05 [KB], [DOC]
 301 4.3BSD Tahoe            1988-06-15 [QCU], [DOC]
 302 4.3BSD NET/1            1988-11-xx [QCU]
 303                         1989-01-01 [DOC]
 304 4.3BSD Reno             1990-06-29 [QCU], [DOC]
 305 4.3BSD NET/2            1991-06-28 [QCU], [DOC]
 306
 307 BSD/386 ALPHA           1991-12-xx [BSDI]
 308                                 first code released to people outside BSDI
 309 386BSD 0.0              1992-02-xx [DOC]
 310 BSD/386 0.3.1           1992-04-xx [BSDI] first ext. beta; B customers
 311 BSD/386 0.3.3           1992-06-xx [BSDI] first CDROM version
 312 386BSD 0.1              1992-07-28 [DOC]
 313 4.4BSD Alpha            1992-07-07
 314 BSD/386 0.9.3           1992-10-xx [BSDI]
 315                                 first external gamma; G customers
 316 BSD/386 0.9.4           1992-12-xx [BSDI]
 317                                 would have been 1.0 except for request
 318                                 for preliminary injunction
 319 BSD/386 1.0             1993-03-xx [BSDI]
 320                                 injunction denied; first official release
 321 NetBSD 0.8              1993-04-20 [NBD]
 322 4.4BSD                  1993-06-01 [USE]
 323 NetBSD 0.9              1993-08-23 [NBD]
 324 FreeBSD 1.0             1993-11-01 [FBD]
 325 BSD/386 1.1             1994-02-xx [BSDI]
 326 4.4BSD Lite             1994-03-01 [USE]
 327 FreeBSD 1.1             1994-05-07 [FBD]
 328 FreeBSD 1.1.5           1994-06-30 [FBD]
 329 FreeBSD 1.1.5.1         1994-07-05 [FBD]
 330                                 supersedes 1.1.5 5 days after release.
 331 NetBSD 1.0              1994-10-26 [NBD]
 332 386BSD 1.0              1994-11-12 [USE]
 333 FreeBSD 2.0             1994-11-23 [FBD]
 334 BSD/OS 2.0              1995-01-xx [BSDI] 4.4 lite based
 335 FreeBSD 2.0.5           1995-06-10 [FBD]
 336 BSD/OS 2.0.1            1995-06-xx [BSDI]
 337 4.4BSD Lite Release 2   1995-06-xx [44B]
 338                                 the true final distribution from the CSRG
 339 FreeBSD 2.1.0           1995-11-19 [FBD]
 340 NetBSD 1.1              1995-11-26 [NBD]
 341 BSD/OS 2.1              1996-01-xx [BSDI]
 342 FreeBSD 2.1.5           1996-07-14 [FBD]
 343 NetBSD 1.2              1996-10-04 [NBD]
 344 OpenBSD 2.0             1996-10-18 [OBD]
 345 FreeBSD 2.1.6           1996-11-16 [FBD]
 346 FreeBSD 2.1.6.1         1996-11-25 [FBD] (sendmail security release)
 347 Rhapsody                1997-xx-xx
 348 FreeBSD 2.1.7           1997-02-20 [FBD]
 349 BSD/OS 3.0              1997-02-xx [BSDI] 4.4 lite2 based
 350 FreeBSD 2.2.0           1997-03-16 [FBD]
 351 FreeBSD 2.2.1           1997-03-25 [FBD]
 352 FreeBSD 2.2.2           1997-05-16 [FBD]
 353 NetBSD 1.2.1            1997-05-20 [NBD] (patch release)
 354 OpenBSD 2.1             1997-06-01 [OBD]
 355 FreeBSD 2.2.5           1997-10-22 [FBD]
 356 OpenBSD 2.2             1997-12-01 [OBD]
 357 NetBSD 1.3              1998-01-04 [NBD]
 358 FreeBSD 2.2.6           1998-03-25 [FBD]
 359 NetBSD 1.3.1            1998-03-09 [NBD] (patch release)
 360 BSD/OS 3.1              1998-03-xx [BSDI]
 361 OpenBSD 2.3             1998-05-19 [OBD]
 362 NetBSD 1.3.2            1998-05-29 [NBD] (patch release)
 363 FreeBSD 2.2.7           1998-07-22 [FBD]
 364 BSD/OS 4.0              1998-08-xx [BSDI]
 365                                 2-lock MP support, ELF executables
 366 FreeBSD 3.0             1998-10-16 [FBD]
 367                                 FreeBSD-3.0 is a snapshot from -current,
 368                                 while 3.1 and 3.2 are from 3.x-stable which
 369                                 was branched quite some time after 3.0-release
 370 FreeBSD 2.2.8           1998-11-29 [FBD]
 371 OpenBSD 2.4             1998-12-01 [OBD]
 372 NetBSD 1.3.3            1998-12-23 [NBD] (patch release)
 373 FreeBSD 3.1             1999-02-15 [FBD]
 374 BSD/OS 4.0.1            1999-03-xx [BSDI]
 375 NetBSD 1.4              1999-05-12 [NBD]
 376 FreeBSD 3.2             1999-05-17 [FBD]
 377 OpenBSD 2.5             1999-05-19 [OBD]
 378 NetBSD 1.4.1            1999-08-26 [NBD] (patch release)
 379 FreeBSD 3.3             1999-09-17 [FBD]
 380 OpenBSD 2.6             1999-12-01 [OBD]
 381 FreeBSD 3.4             1999-12-20 [FBD]
 382 BSD/OS 4.1              1999-12-xx [BSDI]
 383 FreeBSD 4.0             2000-03-13 [FBD]
 384 NetBSD 1.4.2            2000-03-19 [NBD] (patch release)
 385 OpenBSD 2.7             2000-06-15 [OBD]
 386 FreeBSD 3.5             2000-06-24 [FBD]
 387 FreeBSD 4.1             2000-07-27 [FBD]
 388 FreeBSD 3.5.1           2000-07-28 [FBD]
 389 FreeBSD 4.1.1           2000-09-25 [FBD] (a network-only patch release)
 390 FreeBSD 4.2             2000-11-21 [FBD]
 391 NetBSD 1.4.3            2000-11-25 [NBD] (patch release)
 392 BSD/OS 4.2              2000-11-29 [BSDI]
 393 OpenBSD 2.8             2000-12-01 [OBD]
 394 NetBSD 1.5              2000-12-06 [NBD]
 395 Mac OS X 10.0           2001-03-24 [APL]
 396 FreeBSD 4.3             2001-04-20 [FBD]
 397 OpenBSD 2.9             2001-06-01 [OBD]
 398 NetBSD 1.5.1            2001-07-11 [NBD] (patch release)
 399 NetBSD 1.5.2            2001-09-13 [NBD] (patch release)
 400 FreeBSD 4.4             2001-09-18 [FBD]
 401 Mac OS X 10.1           2001-09-29 [APL]
 402 OpenBSD 3.0             2001-12-01 [OBD]
 403 FreeBSD 4.5             2002-01-29 [FBD]
 404 BSD/OS 4.3              2002-03-14 [WRS]
 405 OpenBSD 3.1             2002-05-19 [OBD]
 406 FreeBSD 4.6             2002-06-15 [FBD]
 407 NetBSD 1.5.3            2002-07-22 [NBD] (patch release)
 408 FreeBSD 4.6.2           2002-08-15 [FBD] (patch release)
 409 Mac OS X 10.2           2002-08-23 [APL]
 410 NetBSD 1.6              2002-09-14 [NBD]
 411 FreeBSD 4.7             2002-10-08 [FBD]
 412 OpenBSD 3.2             2002-11-01 [OBD]
 413 FreeBSD 5.0             2003-01-17 [FBD]
 414                                 FreeBSD 5.0 is a separate branch off of
 415                                 -current, similar to 3.0.
 416 FreeBSD 4.8             2003-04-03 [FBD]
 417 NetBSD 1.6.1            2003-04-21 [NBD] (patch release)
 418 OpenBSD 3.3             2003-05-01 [OBD]
 419 BSD/OS 5.0              2003-05-?? [WRS]
 420 FreeBSD 5.1             2003-06-09 [FBD]
 421 Mac OS X 10.3           2003-10-24 [APL]
 422 FreeBSD 4.9             2003-10-28 [FBD]
 423 BSD/OS 5.1 ISE          2003-10-?? [WRS] (final version)
 424 OpenBSD 3.4             2003-11-01 [OBD]
 425 FreeBSD 5.2             2004-01-12 [FBD]
 426 FreeBSD 5.2.1           2004-02-22 [FBD] (patch release)
 427 NetBSD 1.6.2            2004-03-01 [NBD] (patch release)
 428 OpenBSD 3.5             2004-04-01 [OBD]
 429 FreeBSD 4.10            2004-05-27 [FBD]
 430 DragonFly 1.0           2004-07-12 [DFB]
 431 OpenBSD 3.6             2004-10-29 [OBD]
 432 FreeBSD 5.3             2004-11-06 [FBD]
 433 NetBSD 2.0              2004-12-09 [NBD]
 434 FreeBSD 4.11            2005-01-25 [FBD]
 435 DragonFly 1.2.0         2005-04-08 [DFB]
 436 NetBSD 2.0.2            2005-04-14 [NBD] (security/critical release)
 437 Mac OS X 10.4           2005-04-29 [APL]
 438 FreeBSD 5.4             2005-05-09 [FBD]
 439 OpenBSD 3.7             2005-05-19 [OBD]
 440 NetBSD 2.0.3            2005-10-31 [NBD] (security/critical release)
 441 OpenBSD 3.8             2005-11-01 [OBD]
 442 FreeBSD 6.0             2005-11-01 [FBD]
 443 NetBSD 2.1              2005-11-02 [NBD]
 444 NetBSD 3.0              2005-12-23 [NBD]
 445 DragonFly 1.4.0         2006-01-08 [DFB]
 446 OpenBSD 3.9             2006-05-01 [OBD]
 447 FreeBSD 6.1             2005-05-08 [FBD]
 448
 449 Bibliography
 450 ------------------------
 451
 452 Leffler, Samuel J., Marshall Kirk McKusick, Michael J Karels and John
 453 Quarterman. The Design and Implementation of the 4.3BSD UNIX Operating
 454 System. Reading, Mass. Addison-Wesley, 1989. ISBN 0-201-06196-1
 455
 456 Salus, Peter H. A quarter century of UNIX. Addison-Wesley Publishing
 457 Company, Inc., 1994. ISBN 0-201-54777-5
 458
 459 McKusick, Marshall Kirk, Keith Bostic, Michael J Karels, and John
 460 Quarterman. The Design and Implementation of the 4.4BSD Operating
 461 System. Reading, Mass. Addison-Wesley, 1996. ISBN 0-201-54979-4
 462
 463 McKusick, Marshall Kirk, George Neville-Neil. The Design and
 464 Implementation of the FreeBSD Operating System.
 465 Addison-Wesley Professional, Published: Aug 2, 2004. ISBN 0-201-70245-2
 466
 467 Doug McIlroy. Research Unix Reader.
 468
 469 Michael G. Brown. The Role of BSD in the Development of Unix.
 470 Presented to the Tasmanian Unix Special Interest Group of the
 471 Australian Computer Society, Hobart, August 1993.
 472
 473 Peter H. Salus. Unix at 25. Byte Magazine, October 1994.
 474 URL: http://www.byte.com/art/9410/sec8/art3.htm
 475
 476 Andreas Klemm, Lars Köller. If you're going to San Francisco ...
 477 Die freien BSD-Varianten von Unix. c't April 1997, page 368ff.
 478
 479 BSD Release Announcements collection.
 480 URL: http://www.de.FreeBSD.org/de/ftp/releases/
 481
 482 BSD Hypertext Man Pages
 483 URL: http://www.FreeBSD.org/cgi/man.cgi
 484
 485 UNIX history graphing project
 486 URL: http://minnie.tuhs.org/Unix_History/index.html
 487
 488 UNIX history
 489 URL: http://www.levenez.com/unix/
 490
 491 James Howard: The BSD Family Tree
 492 URL: http://ezine.daemonnews.org/200104/bsd_family.html
 493 ("what are the differences between FreeBSD, NetBSD, and OpenBSD?")
 494
 495
 496 Acknowledgments
 497 ---------------
 498
 499 Josh Gilliam for suggestions, bug fixes, and finding very old
 500 original BSD announcements from Usenet or tapes.
 501
 502 Steven M. Schultz for providing 2.8BSD, 2.10BSD, 2.11BSD manual pages.
 503
 504 --
 505 Copyright (c) 1997-2004 Wolfram Schneider <wosch@FreeBSD.ORG>
 506 URL: http://cvsweb.freebsd.org/src/share/misc/bsd-family-tree
 507
 508 $FreeBSD: src/share/misc/bsd-family-tree,v 1.103 2006/05/09 09:04:03 maxim Exp $
 509 $DragonFly: src/share/misc/bsd-family-tree,v 1.8 2006/05/10 15:18:29 swildner Exp $