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  |     |       |      |      | NetBSD 4.0.1    |                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      |      |      | NetBSD 5.1.2    |               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  |             |      |   NetBSD 6.1           |                       |
 266  |          FreeBSD   |      |                 |                       |
 267  |            8.4     |      |                 |                       |
 268  |                    |      |                 |                       |
 269 FreeBSD 10 -current   |  NetBSD -current  OpenBSD -current             |
 270  |                    |      |                 |                       |
 271  v                    v      v                 v                       v
 272
 273 Time
 274 ----------------
 275
 276 Time tolerance +/- 6 months, depending on which book/article you read; if it
 277 was the announcement in Usenet or if it was available as tape.
 278
 279 [44B] McKusick, Marshall Kirk, Keith Bostic, Michael J Karels,
 280         and John Quarterman. The Design and Implementation of
 281         the 4.4BSD Operating System.
 282 [APL] Apple website [http://www.apple.com/macosx/]
 283 [BSDI] Berkeley Software Design, Inc.
 284 [DFB] DragonFlyBSD Project, The.
 285 [DOC] README, COPYRIGHT on tape.
 286 [FBD] FreeBSD Project, The.
 287 [KB]  Keith Bostic. BSD2.10 available from Usenix. comp.unix.sources,
 288         Volume 11, Info 4, April, 1987.
 289 [KKK] Mike Karels, Kirk McKusick, and Keith Bostic. tahoe announcement.
 290         comp.bugs.4bsd.ucb-fixes, June 15, 1988.
 291 [KSJ] Michael J. Karels, Carl F. Smith, and William F. Jolitz.
 292         Changes in the Kernel in 2.9BSD. Second Berkeley Software
 293         Distribution UNIX Version 2.9, July, 1983.
 294 [NBD] NetBSD Project, The.
 295 [OBD] OpenBSD Project, The.
 296 [QCU] Salus, Peter H. A quarter century of UNIX.
 297 [SMS] Steven M. Schultz. 2.11BSD, UNIX for the PDP-11.
 298 [TUHS] The Unix Historical Society.  http://minnie.tuhs.org/Unix_History/.
 299 [USE] Usenet announcement.
 300 [WRS] Wind River Systems, Inc.
 301 [dmr] Dennis Ritchie, via E-Mail
 302
 303 Multics                 1965
 304 UNIX                    Summer 1969
 305                                 DEC PDP-7
 306 First   Edition         1971-11-03 [QCU]
 307                                 DEC PDP-11/20, Assembler
 308 Second  Edition         1972-06-12 [QCU]
 309                                 10 UNIX installations
 310 Third   Edition         1973-02-xx [QCU]
 311                                 Pipes, 16 installations
 312 Fourth  Edition         1973-11-xx [QCU]
 313                                 rewriting in C effected,
 314                                 above 30 installations
 315 Fifth   Edition         1974-06-xx [QCU]
 316                                 above 50 installations
 317 Sixth   Edition         1975-05-xx [QCU]
 318                                 port to DEC Vax
 319 Seventh Edition         1979-01-xx [QCU]
 320                                 first portable UNIX
 321 Eighth  Edition         1985-02-xx [QCU]
 322                                 VAX 11/750, VAX 11/780 [dmr]
 323                                 descended from 4.1c BSD [dmr]
 324                                 descended from 4.1 BSD [44B]
 325                         scooping-out and replacement of the character-device
 326                         and networking part by the streams mechanism
 327
 328 Ninth   Edition         1986-09-xx [QCU]
 329 Tenth   Edition         1989-10-xx [QCU]
 330
 331 1BSD                    late 1977
 332                         1978-03-09 [QCU]
 333                                 PDP-11, Pascal, ex(1)
 334                                 30 free copies of 1BSD sent out
 335                                 35 tapes sold for 50 USD [QCU]
 336 2BSD                    mid 1978 [QCU] 1979-05-10 [TUHS]
 337                                 75 2BSD tapes shipped
 338 2.79BSD                 1980-04-xx [TUHS]
 339 2.8BSD                  1981-07-xx [KSJ]
 340
 341 2.8.1BSD                1982-01-xx [QCU]
 342                                 set of performance improvements
 343 2.9BSD                  1983-07-xx [KSJ]
 344 2.9.1BSD                1983-11-xx [TUHS]
 345 2.9BSD-Seismo           1985-08-xx [SMS]
 346 2.10BSD                 1987-04-xx [KKK]
 347 2.10.1BSD               1989-01-xx [SMS]
 348 2.11BSD                 1992-02-xx [SMS]
 349 2.11BSD rev #430        1999-12-13 [SMS]
 350
 351 32V                     1978-1[01]-xx [QCU]
 352 3BSD                    late 1979 [QCU] March 1980 [TUHS]
 353                                 virtual memory, page replacement,
 354                                 demand paging
 355 4.0BSD                  1980-10-xx
 356 4.1BSD                  1981-07-08 [DOC]
 357 4.1aBSD                 1982-04-xx
 358                                 alpha release, 100 sites, networking [44B]
 359 4.1bBSD                         internal release, fast filesystem [44B]
 360 4.1cBSD                 late 1982
 361                                 beta release, IPC [44B]
 362 4.2BSD                  1983-09-xx [QCU]
 363                         1983-08-03 [DOC]
 364 4.3BSD                  1986-06-xx [QCU]
 365                         1986-04-05 [KB], [DOC]
 366 4.3BSD Tahoe            1988-06-15 [QCU], [DOC]
 367 4.3BSD NET/1            1988-11-xx [QCU]
 368                         1989-01-01 [DOC]
 369 4.3BSD Reno             1990-06-29 [QCU], [DOC]
 370 4.3BSD NET/2            1991-06-28 [QCU], [DOC]
 371
 372 BSD/386 ALPHA           1991-12-xx [BSDI]
 373                                 first code released to people outside BSDI
 374 386BSD 0.0              1992-02-xx [DOC]
 375 BSD/386 0.3.1           1992-04-xx [BSDI] first ext. beta; B customers
 376 BSD/386 0.3.3           1992-06-xx [BSDI] first CDROM version
 377 386BSD 0.1              1992-07-28 [DOC]
 378 4.4BSD Alpha            1992-07-07
 379 BSD/386 0.9.3           1992-10-xx [BSDI]
 380                                 first external gamma; G customers
 381 BSD/386 0.9.4           1992-12-xx [BSDI]
 382                                 would have been 1.0 except for request
 383                                 for preliminary injunction
 384 BSD/386 1.0             1993-03-xx [BSDI]
 385                                 injunction denied; first official release
 386 NetBSD 0.8              1993-04-20 [NBD]
 387 4.4BSD                  1993-06-01 [USE]
 388 NetBSD 0.9              1993-08-23 [NBD]
 389 FreeBSD 1.0             1993-11-01 [FBD]
 390 FreeBSD 1.0.2           1993-11-14 [FBD]
 391                                 supersedes 1.0 13 days after release.
 392 BSD/386 1.1             1994-02-xx [BSDI]
 393 4.4BSD Lite             1994-03-01 [USE]
 394 FreeBSD 1.1             1994-05-07 [FBD]
 395 FreeBSD 1.1.5           1994-06-30 [FBD]
 396 FreeBSD 1.1.5.1         1994-07-05 [FBD]
 397                                 supersedes 1.1.5 5 days after release.
 398 NetBSD 1.0              1994-10-26 [NBD]
 399 386BSD 1.0              1994-11-12 [USE]
 400 FreeBSD 2.0             1994-11-23 [FBD]
 401 BSD/OS 2.0              1995-01-xx [BSDI] 4.4 lite based
 402 FreeBSD 2.0.5           1995-06-10 [FBD]
 403 BSD/OS 2.0.1            1995-06-xx [BSDI]
 404 4.4BSD Lite Release 2   1995-06-xx [44B]
 405                                 the true final distribution from the CSRG
 406 FreeBSD 2.1.0           1995-11-19 [FBD]
 407 NetBSD 1.1              1995-11-26 [NBD]
 408 BSD/OS 2.1              1996-01-xx [BSDI]
 409 FreeBSD 2.1.5           1996-07-14 [FBD]
 410 NetBSD 1.2              1996-10-04 [NBD]
 411 OpenBSD 2.0             1996-10-18 [OBD]
 412 FreeBSD 2.1.6           1996-11-16 [FBD]
 413 FreeBSD 2.1.6.1         1996-11-25 [FBD] (sendmail security release)
 414 Rhapsody                1997-xx-xx
 415 FreeBSD 2.1.7           1997-02-20 [FBD]
 416 BSD/OS 3.0              1997-02-xx [BSDI] 4.4 lite2 based
 417 FreeBSD 2.2.0           1997-03-16 [FBD]
 418 FreeBSD 2.2.1           1997-03-25 [FBD]
 419 FreeBSD 2.2.2           1997-05-16 [FBD]
 420 NetBSD 1.2.1            1997-05-20 [NBD] (patch release)
 421 OpenBSD 2.1             1997-06-01 [OBD]
 422 FreeBSD 2.2.5           1997-10-22 [FBD]
 423 OpenBSD 2.2             1997-12-01 [OBD]
 424 NetBSD 1.3              1998-01-04 [NBD]
 425 FreeBSD 2.2.6           1998-03-25 [FBD]
 426 NetBSD 1.3.1            1998-03-09 [NBD] (patch release)
 427 BSD/OS 3.1              1998-03-xx [BSDI]
 428 OpenBSD 2.3             1998-05-19 [OBD]
 429 NetBSD 1.3.2            1998-05-29 [NBD] (patch release)
 430 FreeBSD 2.2.7           1998-07-22 [FBD]
 431 BSD/OS 4.0              1998-08-xx [BSDI]
 432                                 2-lock MP support, ELF executables
 433 FreeBSD 3.0             1998-10-16 [FBD]
 434                                 FreeBSD-3.0 is a snapshot from -current,
 435                                 while 3.1 and 3.2 are from 3.x-stable which
 436                                 was branched quite some time after 3.0-release
 437 FreeBSD 2.2.8           1998-11-29 [FBD]
 438 OpenBSD 2.4             1998-12-01 [OBD]
 439 NetBSD 1.3.3            1998-12-23 [NBD] (patch release)
 440 FreeBSD 3.1             1999-02-15 [FBD]
 441 BSD/OS 4.0.1            1999-03-xx [BSDI]
 442 NetBSD 1.4              1999-05-12 [NBD]
 443 FreeBSD 3.2             1999-05-17 [FBD]
 444 OpenBSD 2.5             1999-05-19 [OBD]
 445 NetBSD 1.4.1            1999-08-26 [NBD] (patch release)
 446 FreeBSD 3.3             1999-09-17 [FBD]
 447 OpenBSD 2.6             1999-12-01 [OBD]
 448 FreeBSD 3.4             1999-12-20 [FBD]
 449 BSD/OS 4.1              1999-12-xx [BSDI]
 450 FreeBSD 4.0             2000-03-13 [FBD]
 451 NetBSD 1.4.2            2000-03-19 [NBD] (patch release)
 452 OpenBSD 2.7             2000-06-15 [OBD]
 453 FreeBSD 3.5             2000-06-24 [FBD]
 454 FreeBSD 4.1             2000-07-27 [FBD]
 455 FreeBSD 3.5.1           2000-07-28 [FBD]
 456 FreeBSD 4.1.1           2000-09-25 [FBD] (a network-only patch release)
 457 FreeBSD 4.2             2000-11-21 [FBD]
 458 NetBSD 1.4.3            2000-11-25 [NBD] (patch release)
 459 BSD/OS 4.2              2000-11-29 [BSDI]
 460 OpenBSD 2.8             2000-12-01 [OBD]
 461 NetBSD 1.5              2000-12-06 [NBD]
 462 Mac OS X 10.0           2001-03-24 [APL]
 463 FreeBSD 4.3             2001-04-20 [FBD]
 464 OpenBSD 2.9             2001-06-01 [OBD]
 465 NetBSD 1.5.1            2001-07-11 [NBD] (patch release)
 466 NetBSD 1.5.2            2001-09-13 [NBD] (patch release)
 467 FreeBSD 4.4             2001-09-18 [FBD]
 468 Mac OS X 10.1           2001-09-29 [APL]
 469 OpenBSD 3.0             2001-12-01 [OBD]
 470 FreeBSD 4.5             2002-01-29 [FBD]
 471 BSD/OS 4.3              2002-03-14 [WRS]
 472 OpenBSD 3.1             2002-05-19 [OBD]
 473 FreeBSD 4.6             2002-06-15 [FBD]
 474 NetBSD 1.5.3            2002-07-22 [NBD] (patch release)
 475 FreeBSD 4.6.2           2002-08-15 [FBD] (patch release)
 476 Mac OS X 10.2           2002-08-23 [APL]
 477 NetBSD 1.6              2002-09-14 [NBD]
 478 FreeBSD 4.7             2002-10-08 [FBD]
 479 OpenBSD 3.2             2002-11-01 [OBD]
 480 FreeBSD 5.0             2003-01-17 [FBD]
 481                                 FreeBSD 5.0 is a separate branch off of
 482                                 -current, similar to 3.0.
 483 FreeBSD 4.8             2003-04-03 [FBD]
 484 NetBSD 1.6.1            2003-04-21 [NBD] (patch release)
 485 OpenBSD 3.3             2003-05-01 [OBD]
 486 BSD/OS 5.0              2003-05-?? [WRS]
 487 FreeBSD 5.1             2003-06-09 [FBD]
 488 Mac OS X 10.3           2003-10-24 [APL]
 489 FreeBSD 4.9             2003-10-28 [FBD]
 490 BSD/OS 5.1 ISE          2003-10-?? [WRS] (final version)
 491 OpenBSD 3.4             2003-11-01 [OBD]
 492 FreeBSD 5.2             2004-01-12 [FBD]
 493 FreeBSD 5.2.1           2004-02-22 [FBD] (patch release)
 494 NetBSD 1.6.2            2004-03-01 [NBD] (patch release)
 495 OpenBSD 3.5             2004-04-01 [OBD]
 496 FreeBSD 4.10            2004-05-27 [FBD]
 497 DragonFly 1.0           2004-07-12 [DFB]
 498 OpenBSD 3.6             2004-10-29 [OBD]
 499 FreeBSD 5.3             2004-11-06 [FBD]
 500 NetBSD 2.0              2004-12-09 [NBD]
 501 FreeBSD 4.11            2005-01-25 [FBD]
 502 DragonFly 1.2.0         2005-04-08 [DFB]
 503 NetBSD 2.0.2            2005-04-14 [NBD] (security/critical release)
 504 Mac OS X 10.4           2005-04-29 [APL]
 505 FreeBSD 5.4             2005-05-09 [FBD]
 506 OpenBSD 3.7             2005-05-19 [OBD]
 507 NetBSD 2.0.3            2005-10-31 [NBD] (security/critical release)
 508 OpenBSD 3.8             2005-11-01 [OBD]
 509 FreeBSD 6.0             2005-11-01 [FBD]
 510 NetBSD 2.1              2005-11-02 [NBD]
 511 NetBSD 3.0              2005-12-23 [NBD]
 512 DragonFly 1.4.0         2006-01-08 [DFB]
 513 OpenBSD 3.9             2006-05-01 [OBD]
 514 FreeBSD 6.1             2006-05-08 [FBD]
 515 FreeBSD 5.5             2006-05-25 [FBD]
 516 NetBSD 3.0.1            2006-07-24 [NBD] (security/critical release)
 517 DragonFly 1.6.0         2006-07-24 [DFB]
 518 OpenBSD 4.0             2006-11-01 [OBD]
 519 NetBSD 3.0.2            2006-11-04 [NBD] (security/critical release)
 520 NetBSD 3.1              2006-11-04 [NBD]
 521 FreeBSD 6.2             2007-01-15 [FBD]
 522 DragonFly 1.8.0         2007-01-30 [DFB]
 523 OpenBSD 4.1             2007-05-01 [OBD]
 524 DragonFly 1.10.0        2007-08-06 [DFB]
 525 Mac OS X 10.5           2007-10-26 [APL]
 526 OpenBSD 4.2             2007-11-01 [OBD]
 527 NetBSD 4.0              2007-12-19 [NBD]
 528 FreeBSD 6.3             2008-01-18 [FBD]
 529 DragonFly 1.12.0        2008-02-26 [DFB]
 530 FreeBSD 7.0             2008-02-27 [FBD]
 531 OpenBSD 4.3             2008-05-01 [OBD]
 532 DragonFly 2.0.0         2008-07-21 [DFB]
 533 OpenBSD 4.4             2008-11-01 [OBD]
 534 FreeBSD 6.4             2008-11-28 [FBD]
 535 FreeBSD 7.1             2009-01-04 [FBD]
 536 DragonFly 2.2.0         2009-02-17 [DFB]
 537 NetBSD 5.0              2009-04-29 [NBD]
 538 OpenBSD 4.5             2009-05-01 [OBD]
 539 FreeBSD 7.2             2009-05-04 [FBD]
 540 Mac OS X 10.6           2009-06-08 [APL]
 541 NetBSD 5.0.1            2009-08-02 [NBD] (security/critical release)
 542 DragonFly 2.4.0         2009-09-16 [DFB]
 543 OpenBSD 4.6             2009-10-18 [OBD]
 544 FreeBSD 8.0             2009-11-26 [FBD]
 545 NetBSD 5.0.2            2010-02-12 [NBD] (security/critical release)
 546 FreeBSD 7.3             2010-03-23 [FBD]
 547 DragonFly 2.6.0         2010-03-28 [DFB]
 548 OpenBSD 4.7             2010-05-19 [OBD]
 549 FreeBSD 8.1             2010-07-24 [FBD]
 550 DragonFly 2.8.2         2010-10-30 [DFB]
 551 OpenBSD 4.8             2010-11-01 [OBD]
 552 NetBSD 5.1              2010-11-19 [NBD]
 553 FreeBSD 7.4             2011-02-24 [FBD]
 554 FreeBSD 8.2             2011-02-24 [FBD]
 555 DragonFly 2.10.1        2011-04-26 [DFB]
 556 OpenBSD 4.9             2011-05-01 [OBD]
 557 Mac OS X 10.7           2011-07-20 [APL]
 558 OpenBSD 5.0             2011-11-01 [OBD]
 559 FreeBSD 9.0             2012-01-12 [FBD]
 560 NetBSD 5.1.2            2012-02-02 [NBD] (security/critical release)
 561 DragonFly 3.0.1         2012-02-21 [DFB]
 562 FreeBSD 8.3             2012-04-18 [FBD]
 563 OpenBSD 5.1             2012-05-01 [OBD]
 564 Mac OS X 10.8           2012-07-25 [APL]
 565 NetBSD 6.0              2012-10-17 [NBD]
 566 OpenBSD 5.2             2012-11-01 [OBD]
 567 DragonFly 3.2.1         2012-11-02 [DFB]
 568 FreeBSD 9.1             2012-12-30 [FBD]
 569 DragonFly 3.4.1         2013-04-29 [DFB]
 570 OpenBSD 5.3             2013-05-01 [OBD]
 571 NetBSD 6.1              2013-05-18 [NBD]
 572 FreeBSD 8.4             2013-06-07 [FBD]
 573
 574 Bibliography
 575 ------------------------
 576
 577 Leffler, Samuel J., Marshall Kirk McKusick, Michael J Karels and John
 578 Quarterman. The Design and Implementation of the 4.3BSD UNIX Operating
 579 System. Reading, Mass. Addison-Wesley, 1989. ISBN 0-201-06196-1
 580
 581 Salus, Peter H. A quarter century of UNIX. Addison-Wesley Publishing
 582 Company, Inc., 1994. ISBN 0-201-54777-5
 583
 584 McKusick, Marshall Kirk, Keith Bostic, Michael J Karels, and John
 585 Quarterman. The Design and Implementation of the 4.4BSD Operating
 586 System. Reading, Mass. Addison-Wesley, 1996. ISBN 0-201-54979-4
 587
 588 McKusick, Marshall Kirk, George Neville-Neil. The Design and
 589 Implementation of the FreeBSD Operating System.
 590 Addison-Wesley Professional, Published: Aug 2, 2004. ISBN 0-201-70245-2
 591
 592 Doug McIlroy. Research Unix Reader.
 593
 594 Michael G. Brown. The Role of BSD in the Development of Unix.
 595 Presented to the Tasmanian Unix Special Interest Group of the
 596 Australian Computer Society, Hobart, August 1993.
 597
 598 Peter H. Salus. Unix at 25. Byte Magazine, October 1994.
 599 URL: http://www.byte.com/art/9410/sec8/art3.htm
 600
 601 Andreas Klemm, Lars Köller. If you're going to San Francisco ...
 602 Die freien BSD-Varianten von Unix. c't April 1997, page 368ff.
 603
 604 BSD Release Announcements collection.
 605 URL: http://www.FreeBSD.org/releases/
 606
 607 BSD Hypertext Man Pages
 608 URL: http://www.FreeBSD.org/cgi/man.cgi
 609
 610 UNIX history graphing project
 611 URL: http://minnie.tuhs.org/Unix_History/index.html
 612
 613 UNIX history
 614 URL: http://www.levenez.com/unix/
 615
 616 James Howard: The BSD Family Tree
 617 URL: http://ezine.daemonnews.org/200104/bsd_family.html
 618 ("what are the differences between FreeBSD, NetBSD, and OpenBSD?")
 619
 620
 621 Acknowledgments
 622 ---------------
 623
 624 Josh Gilliam for suggestions, bug fixes, and finding very old
 625 original BSD announcements from Usenet or tapes.
 626
 627 Steven M. Schultz for providing 2.8BSD, 2.10BSD, 2.11BSD manual pages.
 628
 629 --
 630 Copyright (c) 1997-2012 Wolfram Schneider <wosch@FreeBSD.ORG>
 631 URL: http://cvsweb.freebsd.org/src/share/misc/bsd-family-tree
 632
 633 $FreeBSD: src/share/misc/bsd-family-tree,v 1.168 2013/06/08 00:35:21 svnexp Exp $