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  |     v    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  |                    |      |                 |                       |
 262 FreeBSD 10 -current   |  NetBSD -current  OpenBSD -current             |
 263  |                    |      |                 |                       |
 264  v                    v      v                 v                       v
 265
 266 Time
 267 ----------------
 268
 269 Time tolerance +/- 6 months, depending on which book/article you read; if it
 270 was the announcement in Usenet or if it was available as tape.
 271
 272 [44B] McKusick, Marshall Kirk, Keith Bostic, Michael J Karels,
 273         and John Quarterman. The Design and Implementation of
 274         the 4.4BSD Operating System.
 275 [APL] Apple website [http://www.apple.com/macosx/]
 276 [BSDI] Berkeley Software Design, Inc.
 277 [DFB] DragonFlyBSD Project, The.
 278 [DOC] README, COPYRIGHT on tape.
 279 [FBD] FreeBSD Project, The.
 280 [KB]  Keith Bostic. BSD2.10 available from Usenix. comp.unix.sources,
 281         Volume 11, Info 4, April, 1987.
 282 [KKK] Mike Karels, Kirk McKusick, and Keith Bostic. tahoe announcement.
 283         comp.bugs.4bsd.ucb-fixes, June 15, 1988.
 284 [KSJ] Michael J. Karels, Carl F. Smith, and William F. Jolitz.
 285         Changes in the Kernel in 2.9BSD. Second Berkeley Software
 286         Distribution UNIX Version 2.9, July, 1983.
 287 [NBD] NetBSD Project, The.
 288 [OBD] OpenBSD Project, The.
 289 [QCU] Salus, Peter H. A quarter century of UNIX.
 290 [SMS] Steven M. Schultz. 2.11BSD, UNIX for the PDP-11.
 291 [TUHS] The Unix Historical Society.  http://minnie.tuhs.org/Unix_History/.
 292 [USE] Usenet announcement.
 293 [WRS] Wind River Systems, Inc.
 294 [dmr] Dennis Ritchie, via E-Mail
 295
 296 Multics                 1965
 297 UNIX                    Summer 1969
 298                                 DEC PDP-7
 299 First   Edition         1971-11-03 [QCU]
 300                                 DEC PDP-11/20, Assembler
 301 Second  Edition         1972-06-12 [QCU]
 302                                 10 UNIX installations
 303 Third   Edition         1973-02-xx [QCU]
 304                                 Pipes, 16 installations
 305 Fourth  Edition         1973-11-xx [QCU]
 306                                 rewriting in C effected,
 307                                 above 30 installations
 308 Fifth   Edition         1974-06-xx [QCU]
 309                                 above 50 installations
 310 Sixth   Edition         1975-05-xx [QCU]
 311                                 port to DEC Vax
 312 Seventh Edition         1979-01-xx [QCU]
 313                                 first portable UNIX
 314 Eighth  Edition         1985-02-xx [QCU]
 315                                 VAX 11/750, VAX 11/780 [dmr]
 316                                 descended from 4.1c BSD [dmr]
 317                                 descended from 4.1 BSD [44B]
 318                         scooping-out and replacement of the character-device
 319                         and networking part by the streams mechanism
 320
 321 Ninth   Edition         1986-09-xx [QCU]
 322 Tenth   Edition         1989-10-xx [QCU]
 323
 324 1BSD                    late 1977
 325                         1978-03-09 [QCU]
 326                                 PDP-11, Pascal, ex(1)
 327                                 30 free copies of 1BSD sent out
 328                                 35 tapes sold for 50 USD [QCU]
 329 2BSD                    mid 1978 [QCU] 1979-05-10 [TUHS]
 330                                 75 2BSD tapes shipped
 331 2.79BSD                 1980-04-xx [TUHS]
 332 2.8BSD                  1981-07-xx [KSJ]
 333
 334 2.8.1BSD                1982-01-xx [QCU]
 335                                 set of performance improvements
 336 2.9BSD                  1983-07-xx [KSJ]
 337 2.9.1BSD                1983-11-xx [TUHS]
 338 2.9BSD-Seismo           1985-08-xx [SMS]
 339 2.10BSD                 1987-04-xx [KKK]
 340 2.10.1BSD               1989-01-xx [SMS]
 341 2.11BSD                 1992-02-xx [SMS]
 342 2.11BSD rev #430        1999-12-13 [SMS]
 343
 344 32V                     1978-1[01]-xx [QCU]
 345 3BSD                    late 1979 [QCU] March 1980 [TUHS]
 346                                 virtual memory, page replacement,
 347                                 demand paging
 348 4.0BSD                  1980-10-xx
 349 4.1BSD                  1981-07-08 [DOC]
 350 4.1aBSD                 1982-04-xx
 351                                 alpha release, 100 sites, networking [44B]
 352 4.1bBSD                         internal release, fast filesystem [44B]
 353 4.1cBSD                 late 1982
 354                                 beta release, IPC [44B]
 355 4.2BSD                  1983-09-xx [QCU]
 356                         1983-08-03 [DOC]
 357 4.3BSD                  1986-06-xx [QCU]
 358                         1986-04-05 [KB], [DOC]
 359 4.3BSD Tahoe            1988-06-15 [QCU], [DOC]
 360 4.3BSD NET/1            1988-11-xx [QCU]
 361                         1989-01-01 [DOC]
 362 4.3BSD Reno             1990-06-29 [QCU], [DOC]
 363 4.3BSD NET/2            1991-06-28 [QCU], [DOC]
 364
 365 BSD/386 ALPHA           1991-12-xx [BSDI]
 366                                 first code released to people outside BSDI
 367 386BSD 0.0              1992-02-xx [DOC]
 368 BSD/386 0.3.1           1992-04-xx [BSDI] first ext. beta; B customers
 369 BSD/386 0.3.3           1992-06-xx [BSDI] first CDROM version
 370 386BSD 0.1              1992-07-28 [DOC]
 371 4.4BSD Alpha            1992-07-07
 372 BSD/386 0.9.3           1992-10-xx [BSDI]
 373                                 first external gamma; G customers
 374 BSD/386 0.9.4           1992-12-xx [BSDI]
 375                                 would have been 1.0 except for request
 376                                 for preliminary injunction
 377 BSD/386 1.0             1993-03-xx [BSDI]
 378                                 injunction denied; first official release
 379 NetBSD 0.8              1993-04-20 [NBD]
 380 4.4BSD                  1993-06-01 [USE]
 381 NetBSD 0.9              1993-08-23 [NBD]
 382 FreeBSD 1.0             1993-11-01 [FBD]
 383 FreeBSD 1.0.2           1993-11-14 [FBD]
 384                                 supersedes 1.0 13 days after release.
 385 BSD/386 1.1             1994-02-xx [BSDI]
 386 4.4BSD Lite             1994-03-01 [USE]
 387 FreeBSD 1.1             1994-05-07 [FBD]
 388 FreeBSD 1.1.5           1994-06-30 [FBD]
 389 FreeBSD 1.1.5.1         1994-07-05 [FBD]
 390                                 supersedes 1.1.5 5 days after release.
 391 NetBSD 1.0              1994-10-26 [NBD]
 392 386BSD 1.0              1994-11-12 [USE]
 393 FreeBSD 2.0             1994-11-23 [FBD]
 394 BSD/OS 2.0              1995-01-xx [BSDI] 4.4 lite based
 395 FreeBSD 2.0.5           1995-06-10 [FBD]
 396 BSD/OS 2.0.1            1995-06-xx [BSDI]
 397 4.4BSD Lite Release 2   1995-06-xx [44B]
 398                                 the true final distribution from the CSRG
 399 FreeBSD 2.1.0           1995-11-19 [FBD]
 400 NetBSD 1.1              1995-11-26 [NBD]
 401 BSD/OS 2.1              1996-01-xx [BSDI]
 402 FreeBSD 2.1.5           1996-07-14 [FBD]
 403 NetBSD 1.2              1996-10-04 [NBD]
 404 OpenBSD 2.0             1996-10-18 [OBD]
 405 FreeBSD 2.1.6           1996-11-16 [FBD]
 406 FreeBSD 2.1.6.1         1996-11-25 [FBD] (sendmail security release)
 407 Rhapsody                1997-xx-xx
 408 FreeBSD 2.1.7           1997-02-20 [FBD]
 409 BSD/OS 3.0              1997-02-xx [BSDI] 4.4 lite2 based
 410 FreeBSD 2.2.0           1997-03-16 [FBD]
 411 FreeBSD 2.2.1           1997-03-25 [FBD]
 412 FreeBSD 2.2.2           1997-05-16 [FBD]
 413 NetBSD 1.2.1            1997-05-20 [NBD] (patch release)
 414 OpenBSD 2.1             1997-06-01 [OBD]
 415 FreeBSD 2.2.5           1997-10-22 [FBD]
 416 OpenBSD 2.2             1997-12-01 [OBD]
 417 NetBSD 1.3              1998-01-04 [NBD]
 418 FreeBSD 2.2.6           1998-03-25 [FBD]
 419 NetBSD 1.3.1            1998-03-09 [NBD] (patch release)
 420 BSD/OS 3.1              1998-03-xx [BSDI]
 421 OpenBSD 2.3             1998-05-19 [OBD]
 422 NetBSD 1.3.2            1998-05-29 [NBD] (patch release)
 423 FreeBSD 2.2.7           1998-07-22 [FBD]
 424 BSD/OS 4.0              1998-08-xx [BSDI]
 425                                 2-lock MP support, ELF executables
 426 FreeBSD 3.0             1998-10-16 [FBD]
 427                                 FreeBSD-3.0 is a snapshot from -current,
 428                                 while 3.1 and 3.2 are from 3.x-stable which
 429                                 was branched quite some time after 3.0-release
 430 FreeBSD 2.2.8           1998-11-29 [FBD]
 431 OpenBSD 2.4             1998-12-01 [OBD]
 432 NetBSD 1.3.3            1998-12-23 [NBD] (patch release)
 433 FreeBSD 3.1             1999-02-15 [FBD]
 434 BSD/OS 4.0.1            1999-03-xx [BSDI]
 435 NetBSD 1.4              1999-05-12 [NBD]
 436 FreeBSD 3.2             1999-05-17 [FBD]
 437 OpenBSD 2.5             1999-05-19 [OBD]
 438 NetBSD 1.4.1            1999-08-26 [NBD] (patch release)
 439 FreeBSD 3.3             1999-09-17 [FBD]
 440 OpenBSD 2.6             1999-12-01 [OBD]
 441 FreeBSD 3.4             1999-12-20 [FBD]
 442 BSD/OS 4.1              1999-12-xx [BSDI]
 443 FreeBSD 4.0             2000-03-13 [FBD]
 444 NetBSD 1.4.2            2000-03-19 [NBD] (patch release)
 445 OpenBSD 2.7             2000-06-15 [OBD]
 446 FreeBSD 3.5             2000-06-24 [FBD]
 447 FreeBSD 4.1             2000-07-27 [FBD]
 448 FreeBSD 3.5.1           2000-07-28 [FBD]
 449 FreeBSD 4.1.1           2000-09-25 [FBD] (a network-only patch release)
 450 FreeBSD 4.2             2000-11-21 [FBD]
 451 NetBSD 1.4.3            2000-11-25 [NBD] (patch release)
 452 BSD/OS 4.2              2000-11-29 [BSDI]
 453 OpenBSD 2.8             2000-12-01 [OBD]
 454 NetBSD 1.5              2000-12-06 [NBD]
 455 Mac OS X 10.0           2001-03-24 [APL]
 456 FreeBSD 4.3             2001-04-20 [FBD]
 457 OpenBSD 2.9             2001-06-01 [OBD]
 458 NetBSD 1.5.1            2001-07-11 [NBD] (patch release)
 459 NetBSD 1.5.2            2001-09-13 [NBD] (patch release)
 460 FreeBSD 4.4             2001-09-18 [FBD]
 461 Mac OS X 10.1           2001-09-29 [APL]
 462 OpenBSD 3.0             2001-12-01 [OBD]
 463 FreeBSD 4.5             2002-01-29 [FBD]
 464 BSD/OS 4.3              2002-03-14 [WRS]
 465 OpenBSD 3.1             2002-05-19 [OBD]
 466 FreeBSD 4.6             2002-06-15 [FBD]
 467 NetBSD 1.5.3            2002-07-22 [NBD] (patch release)
 468 FreeBSD 4.6.2           2002-08-15 [FBD] (patch release)
 469 Mac OS X 10.2           2002-08-23 [APL]
 470 NetBSD 1.6              2002-09-14 [NBD]
 471 FreeBSD 4.7             2002-10-08 [FBD]
 472 OpenBSD 3.2             2002-11-01 [OBD]
 473 FreeBSD 5.0             2003-01-17 [FBD]
 474                                 FreeBSD 5.0 is a separate branch off of
 475                                 -current, similar to 3.0.
 476 FreeBSD 4.8             2003-04-03 [FBD]
 477 NetBSD 1.6.1            2003-04-21 [NBD] (patch release)
 478 OpenBSD 3.3             2003-05-01 [OBD]
 479 BSD/OS 5.0              2003-05-?? [WRS]
 480 FreeBSD 5.1             2003-06-09 [FBD]
 481 Mac OS X 10.3           2003-10-24 [APL]
 482 FreeBSD 4.9             2003-10-28 [FBD]
 483 BSD/OS 5.1 ISE          2003-10-?? [WRS] (final version)
 484 OpenBSD 3.4             2003-11-01 [OBD]
 485 FreeBSD 5.2             2004-01-12 [FBD]
 486 FreeBSD 5.2.1           2004-02-22 [FBD] (patch release)
 487 NetBSD 1.6.2            2004-03-01 [NBD] (patch release)
 488 OpenBSD 3.5             2004-04-01 [OBD]
 489 FreeBSD 4.10            2004-05-27 [FBD]
 490 DragonFly 1.0           2004-07-12 [DFB]
 491 OpenBSD 3.6             2004-10-29 [OBD]
 492 FreeBSD 5.3             2004-11-06 [FBD]
 493 NetBSD 2.0              2004-12-09 [NBD]
 494 FreeBSD 4.11            2005-01-25 [FBD]
 495 DragonFly 1.2.0         2005-04-08 [DFB]
 496 NetBSD 2.0.2            2005-04-14 [NBD] (security/critical release)
 497 Mac OS X 10.4           2005-04-29 [APL]
 498 FreeBSD 5.4             2005-05-09 [FBD]
 499 OpenBSD 3.7             2005-05-19 [OBD]
 500 NetBSD 2.0.3            2005-10-31 [NBD] (security/critical release)
 501 OpenBSD 3.8             2005-11-01 [OBD]
 502 FreeBSD 6.0             2005-11-01 [FBD]
 503 NetBSD 2.1              2005-11-02 [NBD]
 504 NetBSD 3.0              2005-12-23 [NBD]
 505 DragonFly 1.4.0         2006-01-08 [DFB]
 506 OpenBSD 3.9             2006-05-01 [OBD]
 507 FreeBSD 6.1             2006-05-08 [FBD]
 508 FreeBSD 5.5             2006-05-25 [FBD]
 509 NetBSD 3.0.1            2006-07-24 [NBD] (security/critical release)
 510 DragonFly 1.6.0         2006-07-24 [DFB]
 511 OpenBSD 4.0             2006-11-01 [OBD]
 512 NetBSD 3.0.2            2006-11-04 [NBD] (security/critical release)
 513 NetBSD 3.1              2006-11-04 [NBD]
 514 FreeBSD 6.2             2007-01-15 [FBD]
 515 DragonFly 1.8.0         2007-01-30 [DFB]
 516 OpenBSD 4.1             2007-05-01 [OBD]
 517 DragonFly 1.10.0        2007-08-06 [DFB]
 518 Mac OS X 10.5           2007-10-26 [APL]
 519 OpenBSD 4.2             2007-11-01 [OBD]
 520 NetBSD 4.0              2007-12-19 [NBD]
 521 FreeBSD 6.3             2008-01-18 [FBD]
 522 DragonFly 1.12.0        2008-02-26 [DFB]
 523 FreeBSD 7.0             2008-02-27 [FBD]
 524 OpenBSD 4.3             2008-05-01 [OBD]
 525 DragonFly 2.0.0         2008-07-21 [DFB]
 526 OpenBSD 4.4             2008-11-01 [OBD]
 527 FreeBSD 6.4             2008-11-28 [FBD]
 528 FreeBSD 7.1             2009-01-04 [FBD]
 529 DragonFly 2.2.0         2009-02-17 [DFB]
 530 NetBSD 5.0              2009-04-29 [NBD]
 531 OpenBSD 4.5             2009-05-01 [OBD]
 532 FreeBSD 7.2             2009-05-04 [FBD]
 533 Mac OS X 10.6           2009-06-08 [APL]
 534 DragonFly 2.4.0         2009-09-16 [DFB]
 535 OpenBSD 4.6             2009-10-18 [OBD]
 536 FreeBSD 8.0             2009-11-26 [FBD]
 537 FreeBSD 7.3             2010-03-23 [FBD]
 538 DragonFly 2.6.0         2010-03-28 [DFB]
 539 OpenBSD 4.7             2010-05-19 [OBD]
 540 FreeBSD 8.1             2010-07-24 [FBD]
 541 DragonFly 2.8.2         2010-10-30 [DFB]
 542 OpenBSD 4.8             2010-11-01 [OBD]
 543 NetBSD 5.1              2010-11-19 [NBD]
 544 FreeBSD 7.4             2011-02-24 [FBD]
 545 FreeBSD 8.2             2011-02-24 [FBD]
 546 DragonFly 2.10.1        2011-04-26 [DFB]
 547 OpenBSD 4.9             2011-05-01 [OBD]
 548 Mac OS X 10.7           2011-07-20 [APL]
 549 OpenBSD 5.0             2011-11-01 [OBD]
 550 FreeBSD 9.0             2012-01-12 [FBD]
 551 DragonFly 3.0.1         2012-02-21 [DFB]
 552 FreeBSD 8.3             2012-04-18 [FBD]
 553 OpenBSD 5.1             2012-05-01 [OBD]
 554 Mac OS X 10.8           2012-07-25 [APL]
 555 NetBSD 6.0              2012-10-17 [NBD]
 556 OpenBSD 5.2             2012-11-01 [OBD]
 557 DragonFly 3.2.1         2012-11-02 [DFB]
 558
 559 Bibliography
 560 ------------------------
 561
 562 Leffler, Samuel J., Marshall Kirk McKusick, Michael J Karels and John
 563 Quarterman. The Design and Implementation of the 4.3BSD UNIX Operating
 564 System. Reading, Mass. Addison-Wesley, 1989. ISBN 0-201-06196-1
 565
 566 Salus, Peter H. A quarter century of UNIX. Addison-Wesley Publishing
 567 Company, Inc., 1994. ISBN 0-201-54777-5
 568
 569 McKusick, Marshall Kirk, Keith Bostic, Michael J Karels, and John
 570 Quarterman. The Design and Implementation of the 4.4BSD Operating
 571 System. Reading, Mass. Addison-Wesley, 1996. ISBN 0-201-54979-4
 572
 573 McKusick, Marshall Kirk, George Neville-Neil. The Design and
 574 Implementation of the FreeBSD Operating System.
 575 Addison-Wesley Professional, Published: Aug 2, 2004. ISBN 0-201-70245-2
 576
 577 Doug McIlroy. Research Unix Reader.
 578
 579 Michael G. Brown. The Role of BSD in the Development of Unix.
 580 Presented to the Tasmanian Unix Special Interest Group of the
 581 Australian Computer Society, Hobart, August 1993.
 582
 583 Peter H. Salus. Unix at 25. Byte Magazine, October 1994.
 584 URL: http://www.byte.com/art/9410/sec8/art3.htm
 585
 586 Andreas Klemm, Lars Köller. If you're going to San Francisco ...
 587 Die freien BSD-Varianten von Unix. c't April 1997, page 368ff.
 588
 589 BSD Release Announcements collection.
 590 URL: http://www.FreeBSD.org/releases/
 591
 592 BSD Hypertext Man Pages
 593 URL: http://www.FreeBSD.org/cgi/man.cgi
 594
 595 UNIX history graphing project
 596 URL: http://minnie.tuhs.org/Unix_History/index.html
 597
 598 UNIX history
 599 URL: http://www.levenez.com/unix/
 600
 601 James Howard: The BSD Family Tree
 602 URL: http://ezine.daemonnews.org/200104/bsd_family.html
 603 ("what are the differences between FreeBSD, NetBSD, and OpenBSD?")
 604
 605
 606 Acknowledgments
 607 ---------------
 608
 609 Josh Gilliam for suggestions, bug fixes, and finding very old
 610 original BSD announcements from Usenet or tapes.
 611
 612 Steven M. Schultz for providing 2.8BSD, 2.10BSD, 2.11BSD manual pages.
 613
 614 --
 615 Copyright (c) 1997-2012 Wolfram Schneider <wosch@FreeBSD.ORG>
 616 URL: http://cvsweb.freebsd.org/src/share/misc/bsd-family-tree
 617
 618 $FreeBSD: src/share/misc/bsd-family-tree,v 1.159 2012/11/03 19:26:08 maxim Exp $