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          |                DragonFly 2.0.0
 225  |     |    FreeBSD   |      |  4.0.1      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  |              |     |      | |   NetBSD      |                DragonFly 2.4.0
 235  |              |     |      | |    5.0.1  OpenBSD 4.6                 |
 236  |              |     |      | |       |       |                       |
 237  *--FreeBSD     |     |      | |       |       |                       |
 238  |    8.0       |     |      | |       |       |                       |
 239  |     |     FreeBSD  |      | |   NetBSD      |                       |
 240  |     |       7.3    |      | |    5.0.2      |                DragonFly 2.6.0
 241  |     |        |     |      | |           OpenBSD 4.7                 |
 242  |  FreeBSD     |     |      | |               |                       |
 243  |    8.1       |     |      | |               |                       |
 244  |     |        |     |      | |               |                DragonFly 2.8.2
 245  |     |        |     |      | |           OpenBSD 4.8                 |
 246  |     |        |     |      | *--NetBSD       |                       |
 247  |  FreeBSD  FreeBSD  |      | |    5.1        |                       |
 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      |               DragonFly 3.0.1
 255  |     |    FreeBSD   |      | |    5.1.2      |                       |
 256  |     |      8.3     |      | |      |        |                       |
 257  |     |       |      |      | |   NetBSD      |                       |
 258  |     |       |      |      | |    5.1.3      |                       |
 259  |     |       |      |      | |           OpenBSD 5.1                 |
 260  |     |       |   Mac OS X  | `----.          |                       |
 261  |     |       |     10.8    |       \         |                       |
 262  |     |       |      |   NetBSD 6.0  |        |                       |
 263  |     |       |      |      | | |    |    OpenBSD 5.2         DragonFly 3.2.1
 264  |  FreeBSD    |      |      | | | NetBSD      |                       |
 265  |    9.1      |      |      | | |   5.2       |                       |
 266  |     |       |      |      | | |    |        |                       |
 267  |     |       |      |      | | | NetBSD      |                       |
 268  |     |       |      |      | | |  5.2.1      |                       |
 269  |     |       |      |      | | |             |                       |
 270  |     |       |      |      | |  \            |                       |
 271  |     |       |      |      | |   NetBSD      |                       |
 272  |     |       |      |      | |    6.0.1      |                       |
 273  |     |       |      |      | |      |        |                       |
 274  |     |       |      |      | |   NetBSD      |                       |
 275  |     |       |      |      | |    6.0.2      |                       |
 276  |     |       |      |      | |      |   OpenBSD 5.3          DragonFly 3.4.1
 277  |     |       |      |      | |   NetBSD      |                       |
 278  |     |       |      |      | |    6.0.3      |                       |
 279  |     |       |      |      | |               |                       |
 280  |     |       |      |      | |`-NetBSD 6.1   |                       |
 281  |     |    FreeBSD   |      |       |         |                       |
 282  |     |      8.4     |      |    NetBSD 6.1.1 |                       |
 283  |     |              |      |       |         |                       |
 284  |  FreeBSD           |      |    NetBSD 6.1.2 |                       |
 285  |    9.2          Mac OS X  |                 |                       |
 286  |                   10.9    |            OpenBSD 5.4                  |
 287  |                    |      |                 |               DragonFly 3.6.0
 288  |                    |      |                 |                       |
 289  |                    |      |                 |                       |
 290  |                    |      |                 |                       |
 291  |                    |      |                 |                       |
 292 FreeBSD 10 -current   |  NetBSD -current  OpenBSD -current             |
 293  |                    |      |                 |                       |
 294  v                    v      v                 v                       v
 295
 296 Time
 297 ----------------
 298
 299 Time tolerance +/- 6 months, depending on which book/article you read; if it
 300 was the announcement in Usenet or if it was available as tape.
 301
 302 [44B] McKusick, Marshall Kirk, Keith Bostic, Michael J Karels,
 303         and John Quarterman. The Design and Implementation of
 304         the 4.4BSD Operating System.
 305 [APL] Apple website [http://www.apple.com/macosx/]
 306 [BSDI] Berkeley Software Design, Inc.
 307 [DFB] DragonFlyBSD Project, The.
 308 [DOC] README, COPYRIGHT on tape.
 309 [FBD] FreeBSD Project, The.
 310 [KB]  Keith Bostic. BSD2.10 available from Usenix. comp.unix.sources,
 311         Volume 11, Info 4, April, 1987.
 312 [KKK] Mike Karels, Kirk McKusick, and Keith Bostic. tahoe announcement.
 313         comp.bugs.4bsd.ucb-fixes, June 15, 1988.
 314 [KSJ] Michael J. Karels, Carl F. Smith, and William F. Jolitz.
 315         Changes in the Kernel in 2.9BSD. Second Berkeley Software
 316         Distribution UNIX Version 2.9, July, 1983.
 317 [NBD] NetBSD Project, The.
 318 [OBD] OpenBSD Project, The.
 319 [QCU] Salus, Peter H. A quarter century of UNIX.
 320 [SMS] Steven M. Schultz. 2.11BSD, UNIX for the PDP-11.
 321 [TUHS] The Unix Historical Society.  http://minnie.tuhs.org/Unix_History/.
 322 [USE] Usenet announcement.
 323 [WRS] Wind River Systems, Inc.
 324 [dmr] Dennis Ritchie, via E-Mail
 325
 326 Multics                 1965
 327 UNIX                    Summer 1969
 328                                 DEC PDP-7
 329 First   Edition         1971-11-03 [QCU]
 330                                 DEC PDP-11/20, Assembler
 331 Second  Edition         1972-06-12 [QCU]
 332                                 10 UNIX installations
 333 Third   Edition         1973-02-xx [QCU]
 334                                 Pipes, 16 installations
 335 Fourth  Edition         1973-11-xx [QCU]
 336                                 rewriting in C effected,
 337                                 above 30 installations
 338 Fifth   Edition         1974-06-xx [QCU]
 339                                 above 50 installations
 340 Sixth   Edition         1975-05-xx [QCU]
 341                                 port to DEC Vax
 342 Seventh Edition         1979-01-xx [QCU]
 343                                 first portable UNIX
 344 Eighth  Edition         1985-02-xx [QCU]
 345                                 VAX 11/750, VAX 11/780 [dmr]
 346                                 descended from 4.1c BSD [dmr]
 347                                 descended from 4.1 BSD [44B]
 348                         scooping-out and replacement of the character-device
 349                         and networking part by the streams mechanism
 350
 351 Ninth   Edition         1986-09-xx [QCU]
 352 Tenth   Edition         1989-10-xx [QCU]
 353
 354 1BSD                    late 1977
 355                         1978-03-09 [QCU]
 356                                 PDP-11, Pascal, ex(1)
 357                                 30 free copies of 1BSD sent out
 358                                 35 tapes sold for 50 USD [QCU]
 359 2BSD                    mid 1978 [QCU] 1979-05-10 [TUHS]
 360                                 75 2BSD tapes shipped
 361 2.79BSD                 1980-04-xx [TUHS]
 362 2.8BSD                  1981-07-xx [KSJ]
 363
 364 2.8.1BSD                1982-01-xx [QCU]
 365                                 set of performance improvements
 366 2.9BSD                  1983-07-xx [KSJ]
 367 2.9.1BSD                1983-11-xx [TUHS]
 368 2.9BSD-Seismo           1985-08-xx [SMS]
 369 2.10BSD                 1987-04-xx [KKK]
 370 2.10.1BSD               1989-01-xx [SMS]
 371 2.11BSD                 1992-02-xx [SMS]
 372 2.11BSD rev #430        1999-12-13 [SMS]
 373
 374 32V                     1978-1[01]-xx [QCU]
 375 3BSD                    late 1979 [QCU] March 1980 [TUHS]
 376                                 virtual memory, page replacement,
 377                                 demand paging
 378 4.0BSD                  1980-10-xx
 379 4.1BSD                  1981-07-08 [DOC]
 380 4.1aBSD                 1982-04-xx
 381                                 alpha release, 100 sites, networking [44B]
 382 4.1bBSD                         internal release, fast filesystem [44B]
 383 4.1cBSD                 late 1982
 384                                 beta release, IPC [44B]
 385 4.2BSD                  1983-09-xx [QCU]
 386                         1983-08-03 [DOC]
 387 4.3BSD                  1986-06-xx [QCU]
 388                         1986-04-05 [KB], [DOC]
 389 4.3BSD Tahoe            1988-06-15 [QCU], [DOC]
 390 4.3BSD NET/1            1988-11-xx [QCU]
 391                         1989-01-01 [DOC]
 392 4.3BSD Reno             1990-06-29 [QCU], [DOC]
 393 4.3BSD NET/2            1991-06-28 [QCU], [DOC]
 394
 395 BSD/386 ALPHA           1991-12-xx [BSDI]
 396                                 first code released to people outside BSDI
 397 386BSD 0.0              1992-02-xx [DOC]
 398 BSD/386 0.3.1           1992-04-xx [BSDI] first ext. beta; B customers
 399 BSD/386 0.3.3           1992-06-xx [BSDI] first CDROM version
 400 386BSD 0.1              1992-07-28 [DOC]
 401 4.4BSD Alpha            1992-07-07
 402 BSD/386 0.9.3           1992-10-xx [BSDI]
 403                                 first external gamma; G customers
 404 BSD/386 0.9.4           1992-12-xx [BSDI]
 405                                 would have been 1.0 except for request
 406                                 for preliminary injunction
 407 BSD/386 1.0             1993-03-xx [BSDI]
 408                                 injunction denied; first official release
 409 NetBSD 0.8              1993-04-20 [NBD]
 410 4.4BSD                  1993-06-01 [USE]
 411 NetBSD 0.9              1993-08-23 [NBD]
 412 FreeBSD 1.0             1993-11-01 [FBD]
 413 FreeBSD 1.0.2           1993-11-14 [FBD]
 414                                 supersedes 1.0 13 days after release.
 415 BSD/386 1.1             1994-02-xx [BSDI]
 416 4.4BSD Lite             1994-03-01 [USE]
 417 FreeBSD 1.1             1994-05-07 [FBD]
 418 FreeBSD 1.1.5           1994-06-30 [FBD]
 419 FreeBSD 1.1.5.1         1994-07-05 [FBD]
 420                                 supersedes 1.1.5 5 days after release.
 421 NetBSD 1.0              1994-10-26 [NBD]
 422 386BSD 1.0              1994-11-12 [USE]
 423 FreeBSD 2.0             1994-11-23 [FBD]
 424 BSD/OS 2.0              1995-01-xx [BSDI] 4.4 lite based
 425 FreeBSD 2.0.5           1995-06-10 [FBD]
 426 BSD/OS 2.0.1            1995-06-xx [BSDI]
 427 4.4BSD Lite Release 2   1995-06-xx [44B]
 428                                 the true final distribution from the CSRG
 429 FreeBSD 2.1.0           1995-11-19 [FBD]
 430 NetBSD 1.1              1995-11-26 [NBD]
 431 BSD/OS 2.1              1996-01-xx [BSDI]
 432 FreeBSD 2.1.5           1996-07-14 [FBD]
 433 NetBSD 1.2              1996-10-04 [NBD]
 434 OpenBSD 2.0             1996-10-18 [OBD]
 435 FreeBSD 2.1.6           1996-11-16 [FBD]
 436 FreeBSD 2.1.6.1         1996-11-25 [FBD] (sendmail security release)
 437 Rhapsody                1997-xx-xx
 438 FreeBSD 2.1.7           1997-02-20 [FBD]
 439 BSD/OS 3.0              1997-02-xx [BSDI] 4.4 lite2 based
 440 FreeBSD 2.2.0           1997-03-16 [FBD]
 441 FreeBSD 2.2.1           1997-03-25 [FBD]
 442 FreeBSD 2.2.2           1997-05-16 [FBD]
 443 NetBSD 1.2.1            1997-05-20 [NBD] (patch release)
 444 OpenBSD 2.1             1997-06-01 [OBD]
 445 FreeBSD 2.2.5           1997-10-22 [FBD]
 446 OpenBSD 2.2             1997-12-01 [OBD]
 447 NetBSD 1.3              1998-01-04 [NBD]
 448 FreeBSD 2.2.6           1998-03-25 [FBD]
 449 NetBSD 1.3.1            1998-03-09 [NBD] (patch release)
 450 BSD/OS 3.1              1998-03-xx [BSDI]
 451 OpenBSD 2.3             1998-05-19 [OBD]
 452 NetBSD 1.3.2            1998-05-29 [NBD] (patch release)
 453 FreeBSD 2.2.7           1998-07-22 [FBD]
 454 BSD/OS 4.0              1998-08-xx [BSDI]
 455                                 2-lock MP support, ELF executables
 456 FreeBSD 3.0             1998-10-16 [FBD]
 457                                 FreeBSD-3.0 is a snapshot from -current,
 458                                 while 3.1 and 3.2 are from 3.x-stable which
 459                                 was branched quite some time after 3.0-release
 460 FreeBSD 2.2.8           1998-11-29 [FBD]
 461 OpenBSD 2.4             1998-12-01 [OBD]
 462 NetBSD 1.3.3            1998-12-23 [NBD] (patch release)
 463 FreeBSD 3.1             1999-02-15 [FBD]
 464 BSD/OS 4.0.1            1999-03-xx [BSDI]
 465 NetBSD 1.4              1999-05-12 [NBD]
 466 FreeBSD 3.2             1999-05-17 [FBD]
 467 OpenBSD 2.5             1999-05-19 [OBD]
 468 NetBSD 1.4.1            1999-08-26 [NBD] (patch release)
 469 FreeBSD 3.3             1999-09-17 [FBD]
 470 OpenBSD 2.6             1999-12-01 [OBD]
 471 FreeBSD 3.4             1999-12-20 [FBD]
 472 BSD/OS 4.1              1999-12-xx [BSDI]
 473 FreeBSD 4.0             2000-03-13 [FBD]
 474 NetBSD 1.4.2            2000-03-19 [NBD] (patch release)
 475 OpenBSD 2.7             2000-06-15 [OBD]
 476 FreeBSD 3.5             2000-06-24 [FBD]
 477 FreeBSD 4.1             2000-07-27 [FBD]
 478 FreeBSD 3.5.1           2000-07-28 [FBD]
 479 FreeBSD 4.1.1           2000-09-25 [FBD] (a network-only patch release)
 480 FreeBSD 4.2             2000-11-21 [FBD]
 481 NetBSD 1.4.3            2000-11-25 [NBD] (patch release)
 482 BSD/OS 4.2              2000-11-29 [BSDI]
 483 OpenBSD 2.8             2000-12-01 [OBD]
 484 NetBSD 1.5              2000-12-06 [NBD]
 485 Mac OS X 10.0           2001-03-24 [APL]
 486 FreeBSD 4.3             2001-04-20 [FBD]
 487 OpenBSD 2.9             2001-06-01 [OBD]
 488 NetBSD 1.5.1            2001-07-11 [NBD] (patch release)
 489 NetBSD 1.5.2            2001-09-13 [NBD] (patch release)
 490 FreeBSD 4.4             2001-09-18 [FBD]
 491 Mac OS X 10.1           2001-09-29 [APL]
 492 OpenBSD 3.0             2001-12-01 [OBD]
 493 FreeBSD 4.5             2002-01-29 [FBD]
 494 BSD/OS 4.3              2002-03-14 [WRS]
 495 OpenBSD 3.1             2002-05-19 [OBD]
 496 FreeBSD 4.6             2002-06-15 [FBD]
 497 NetBSD 1.5.3            2002-07-22 [NBD] (patch release)
 498 FreeBSD 4.6.2           2002-08-15 [FBD] (patch release)
 499 Mac OS X 10.2           2002-08-23 [APL]
 500 NetBSD 1.6              2002-09-14 [NBD]
 501 FreeBSD 4.7             2002-10-08 [FBD]
 502 OpenBSD 3.2             2002-11-01 [OBD]
 503 FreeBSD 5.0             2003-01-17 [FBD]
 504                                 FreeBSD 5.0 is a separate branch off of
 505                                 -current, similar to 3.0.
 506 FreeBSD 4.8             2003-04-03 [FBD]
 507 NetBSD 1.6.1            2003-04-21 [NBD] (patch release)
 508 OpenBSD 3.3             2003-05-01 [OBD]
 509 BSD/OS 5.0              2003-05-?? [WRS]
 510 FreeBSD 5.1             2003-06-09 [FBD]
 511 Mac OS X 10.3           2003-10-24 [APL]
 512 FreeBSD 4.9             2003-10-28 [FBD]
 513 BSD/OS 5.1 ISE          2003-10-?? [WRS] (final version)
 514 OpenBSD 3.4             2003-11-01 [OBD]
 515 FreeBSD 5.2             2004-01-12 [FBD]
 516 FreeBSD 5.2.1           2004-02-22 [FBD] (patch release)
 517 NetBSD 1.6.2            2004-03-01 [NBD] (patch release)
 518 OpenBSD 3.5             2004-04-01 [OBD]
 519 FreeBSD 4.10            2004-05-27 [FBD]
 520 DragonFly 1.0           2004-07-12 [DFB]
 521 OpenBSD 3.6             2004-10-29 [OBD]
 522 FreeBSD 5.3             2004-11-06 [FBD]
 523 NetBSD 2.0              2004-12-09 [NBD]
 524 FreeBSD 4.11            2005-01-25 [FBD]
 525 DragonFly 1.2.0         2005-04-08 [DFB]
 526 NetBSD 2.0.2            2005-04-14 [NBD] (security/critical release)
 527 Mac OS X 10.4           2005-04-29 [APL]
 528 FreeBSD 5.4             2005-05-09 [FBD]
 529 OpenBSD 3.7             2005-05-19 [OBD]
 530 NetBSD 2.0.3            2005-10-31 [NBD] (security/critical release)
 531 OpenBSD 3.8             2005-11-01 [OBD]
 532 FreeBSD 6.0             2005-11-01 [FBD]
 533 NetBSD 2.1              2005-11-02 [NBD]
 534 NetBSD 3.0              2005-12-23 [NBD]
 535 DragonFly 1.4.0         2006-01-08 [DFB]
 536 OpenBSD 3.9             2006-05-01 [OBD]
 537 FreeBSD 6.1             2006-05-08 [FBD]
 538 FreeBSD 5.5             2006-05-25 [FBD]
 539 NetBSD 3.0.1            2006-07-24 [NBD] (security/critical release)
 540 DragonFly 1.6.0         2006-07-24 [DFB]
 541 OpenBSD 4.0             2006-11-01 [OBD]
 542 NetBSD 3.0.2            2006-11-04 [NBD] (security/critical release)
 543 NetBSD 3.1              2006-11-04 [NBD]
 544 FreeBSD 6.2             2007-01-15 [FBD]
 545 DragonFly 1.8.0         2007-01-30 [DFB]
 546 OpenBSD 4.1             2007-05-01 [OBD]
 547 DragonFly 1.10.0        2007-08-06 [DFB]
 548 Mac OS X 10.5           2007-10-26 [APL]
 549 OpenBSD 4.2             2007-11-01 [OBD]
 550 NetBSD 4.0              2007-12-19 [NBD]
 551 FreeBSD 6.3             2008-01-18 [FBD]
 552 DragonFly 1.12.0        2008-02-26 [DFB]
 553 FreeBSD 7.0             2008-02-27 [FBD]
 554 OpenBSD 4.3             2008-05-01 [OBD]
 555 DragonFly 2.0.0         2008-07-21 [DFB]
 556 OpenBSD 4.4             2008-11-01 [OBD]
 557 FreeBSD 6.4             2008-11-28 [FBD]
 558 FreeBSD 7.1             2009-01-04 [FBD]
 559 DragonFly 2.2.0         2009-02-17 [DFB]
 560 NetBSD 5.0              2009-04-29 [NBD]
 561 OpenBSD 4.5             2009-05-01 [OBD]
 562 FreeBSD 7.2             2009-05-04 [FBD]
 563 Mac OS X 10.6           2009-06-08 [APL]
 564 NetBSD 5.0.1            2009-08-02 [NBD] (security/critical release)
 565 DragonFly 2.4.0         2009-09-16 [DFB]
 566 OpenBSD 4.6             2009-10-18 [OBD]
 567 FreeBSD 8.0             2009-11-26 [FBD]
 568 NetBSD 5.0.2            2010-02-12 [NBD] (security/critical release)
 569 FreeBSD 7.3             2010-03-23 [FBD]
 570 DragonFly 2.6.0         2010-03-28 [DFB]
 571 OpenBSD 4.7             2010-05-19 [OBD]
 572 FreeBSD 8.1             2010-07-24 [FBD]
 573 DragonFly 2.8.2         2010-10-30 [DFB]
 574 OpenBSD 4.8             2010-11-01 [OBD]
 575 NetBSD 5.1              2010-11-19 [NBD]
 576 FreeBSD 7.4             2011-02-24 [FBD]
 577 FreeBSD 8.2             2011-02-24 [FBD]
 578 DragonFly 2.10.1        2011-04-26 [DFB]
 579 OpenBSD 4.9             2011-05-01 [OBD]
 580 Mac OS X 10.7           2011-07-20 [APL]
 581 OpenBSD 5.0             2011-11-01 [OBD]
 582 FreeBSD 9.0             2012-01-12 [FBD]
 583 NetBSD 5.1.2            2012-02-02 [NBD] (security/critical release)
 584 DragonFly 3.0.1         2012-02-21 [DFB]
 585 FreeBSD 8.3             2012-04-18 [FBD]
 586 OpenBSD 5.1             2012-05-01 [OBD]
 587 Mac OS X 10.8           2012-07-25 [APL]
 588 NetBSD 6.0              2012-10-17 [NBD]
 589 OpenBSD 5.2             2012-11-01 [OBD]
 590 DragonFly 3.2.1         2012-11-02 [DFB]
 591 NetBSD 5.2              2012-12-03 [NBD]
 592 NetBSD 6.0.1            2012-12-26 [NBD] (security/critical release)
 593 FreeBSD 9.1             2012-12-30 [FBD]
 594 DragonFly 3.4.1         2013-04-29 [DFB]
 595 OpenBSD 5.3             2013-05-01 [OBD]
 596 NetBSD 6.0.2            2013-05-18 [NBD] (security/critical release)
 597 NetBSD 6.1              2013-05-18 [NBD]
 598 FreeBSD 8.4             2013-06-07 [FBD]
 599 NetBSD 6.1.1            2013-08-22 [NBD]
 600 NetBSD 5.1.3            2013-09-29 [NBD]
 601 NetBSD 5.2.1            2013-09-29 [NBD]
 602 FreeBSD 9.2             2013-09-30 [FBD]
 603 NetBSD 6.0.3            2013-09-30 [NBD]
 604 NetBSD 6.1.2            2013-09-30 [NBD]
 605 Mac OS X 10.9           2013-10-22 [APL]
 606 OpenBSD 5.4             2013-11-01 [OBD]
 607 DragonFly 3.6.0         2013-11-25 [DFB]
 608
 609 Bibliography
 610 ------------------------
 611
 612 Leffler, Samuel J., Marshall Kirk McKusick, Michael J Karels and John
 613 Quarterman. The Design and Implementation of the 4.3BSD UNIX Operating
 614 System. Reading, Mass. Addison-Wesley, 1989. ISBN 0-201-06196-1
 615
 616 Salus, Peter H. A quarter century of UNIX. Addison-Wesley Publishing
 617 Company, Inc., 1994. ISBN 0-201-54777-5
 618
 619 McKusick, Marshall Kirk, Keith Bostic, Michael J Karels, and John
 620 Quarterman. The Design and Implementation of the 4.4BSD Operating
 621 System. Reading, Mass. Addison-Wesley, 1996. ISBN 0-201-54979-4
 622
 623 McKusick, Marshall Kirk, George Neville-Neil. The Design and
 624 Implementation of the FreeBSD Operating System.
 625 Addison-Wesley Professional, Published: Aug 2, 2004. ISBN 0-201-70245-2
 626
 627 Doug McIlroy. Research Unix Reader.
 628
 629 Michael G. Brown. The Role of BSD in the Development of Unix.
 630 Presented to the Tasmanian Unix Special Interest Group of the
 631 Australian Computer Society, Hobart, August 1993.
 632
 633 Peter H. Salus. Unix at 25. Byte Magazine, October 1994.
 634 URL: http://www.byte.com/art/9410/sec8/art3.htm
 635
 636 Andreas Klemm, Lars Köller. If you're going to San Francisco ...
 637 Die freien BSD-Varianten von Unix. c't April 1997, page 368ff.
 638
 639 BSD Release Announcements collection.
 640 URL: http://www.FreeBSD.org/releases/
 641
 642 BSD Hypertext Man Pages
 643 URL: http://www.FreeBSD.org/cgi/man.cgi
 644
 645 UNIX history graphing project
 646 URL: http://minnie.tuhs.org/Unix_History/index.html
 647
 648 UNIX history
 649 URL: http://www.levenez.com/unix/
 650
 651 James Howard: The BSD Family Tree
 652 URL: http://ezine.daemonnews.org/200104/bsd_family.html
 653 ("what are the differences between FreeBSD, NetBSD, and OpenBSD?")
 654
 655
 656 Acknowledgments
 657 ---------------
 658
 659 Josh Gilliam for suggestions, bug fixes, and finding very old
 660 original BSD announcements from Usenet or tapes.
 661
 662 Steven M. Schultz for providing 2.8BSD, 2.10BSD, 2.11BSD manual pages.
 663
 664 --
 665 Copyright (c) 1997-2012 Wolfram Schneider <wosch@FreeBSD.ORG>
 666 URL: http://svnweb.freebsd.org/base/head/share/misc/bsd-family-tree
 667
 668 $FreeBSD: head/share/misc/bsd-family-tree 258619 2013-11-26 08:07:24Z pluknet $