Unix system family tree

2023-12-30
#Unix #FreeBSD #Unix

This page is totaly from: https://cgit.freebsd.org/src/tree/share/misc/bsd-family-tree

1. The UNIX system family tree: Research and BSD

First Edition (V1)
     |
Second Edition (V2)
     |
Third Edition (V3)
     |
Fourth Edition (V4)
     |
Fifth Edition (V5)
     |
Sixth Edition (V6) -----*
       \                |
        \               |
         \              |
Seventh Edition (V7)----|----------------------*
            \           |                      |
             \        1BSD                     |
             32V        |                      |
               \      2BSD---------------*     |
                \    /                   |     |
                 \  /                    |     |
                  \/                     |     |
                 3BSD                    |     |
                  |                      |     |
               4.0BSD                2.79BSD   |
                  |                      |     |
               4.1BSD --------------> 2.8BSD <-*
                  |                      |
              4.1aBSD -----------\       |
                  |                \     |
              4.1bBSD                \   |
                  |                    \ |
      *------ 4.1cBSD --------------> 2.9BSD
     /            |                      |
Eighth Edition    |                   2.9BSD-Seismo
     |            |                      |
     +----<--- 4.2BSD               2.9.1BSD
     |            |                      |
     +----<--- 4.3BSD -------------> 2.10BSD
     |            |               /      |
Ninth Edition     |              / 2.10.1BSD
     |         4.3BSD Tahoe-----+        |
     |            |              \       |
     |            |                \     |
     v            |                  2.11BSD
Tenth Edition     |                      |
                  |                  2.11BSD rev #430
               4.3BSD NET/1              |
                  |                      v
               4.3BSD Reno
                  |
   *---------- 4.3BSD NET/2 -------------------+-------------*
   |                    |                      |             |
386BSD 0.0              |                      |           BSD/386 ALPHA
   |                    |                      |             |
386BSD 0.1 ------------>+                      |           BSD/386 0.3.[13]
   |     \              |                  4.4BSD Alpha      |
   |     386BSD 1.0     |                      |           BSD/386 0.9.[34]
   |                    |                  4.4BSD            |
   |                    |                    / |             |
   |                    |   4.4BSD-Encumbered  |             |
   |                -NetBSD 0.8                |           BSD/386 1.0
   |               /    |                      |             |
FreeBSD 1.0 <-----'     *--NetBSD 0.9          |           BSD/386 1.1
   |                    |           .----- 4.4BSD Lite       |
FreeBSD 1.1             |          /     /     |     \       |
   |                    |         /     |      |      \      |
FreeBSD 1.1.5       .---|--------'      |      |       \     |
   |               /    |               |      |        \    |
FreeBSD 1.1.5.1   /     |               |      |         \   |
   |             /      *--NetBSD 1.0 <-'      |          \  |
   |            /       |                      |           \ |
FreeBSD 2.0 <--'        |                      |           BSD/OS 2.0
   |                     \                     |             |
FreeBSD 2.0.5             \                    |           BSD/OS 2.0.1
   |                 .-----\------------- 4.4BSD Lite2       |
   |                 |      \             |  |   |   |       |
   |                 | .-----|------Rhapsody |   |   |       |
   |                 | |     |        NetBSD 1.3 |   |       |
   |                 | |     |           OpenBSD 2.3 |       |
   |                 | |     |                BSD/OS 3.0     |
FreeBSD 2.1          | |     |                               |
 |   |               | |     *--NetBSD 1.1 -.              BSD/OS 2.1
 | FreeBSD 2.1.5     | |     |               \               |
 |     |             | |     *--NetBSD 1.2    \            BSD/OS 3.0
 | FreeBSD 2.1.6     | |     |  \          OpenBSD 2.0       |
 |     |             | |     |   \             |             |
 | FreeBSD 2.1.6.1   | |     |    \            |             |
 |     |             | |     |     \           |             |
 | FreeBSD 2.1.7     | |     |      |          |             |
 |     |             | |     |  NetBSD 1.2.1   |             |
 | FreeBSD 2.1.7.1   | |     |                 |             |
 |                   | |     |                 |             |
 |                   | |     |                 |             |
 *-FreeBSD 2.2       | |     |                 |             |
 |        \          | |     |                 |             |
 |     FreeBSD 2.2.1 | |     |                 |             |
 |         |         | |     |                 |             |
 |     FreeBSD 2.2.2 | |     |             OpenBSD 2.1       |
 |         |         | |     |                 |             |
 |     FreeBSD 2.2.5 | |     |                 |             |
 |         |         | |     |             OpenBSD 2.2       |
 |         |         | |     *--NetBSD 1.3     |             |
 |     FreeBSD 2.2.6 | |     |    |            |             |
 |         |         | |     | NetBSD 1.3.1    |           BSD/OS 3.1
 |         |         | |     |    |        OpenBSD 2.3       |
 |         |         | |     | NetBSD 1.3.2    |             |
 |     FreeBSD 2.2.7 | |     |    |            |             |
 |         |         | |     |    |            |           BSD/OS 4.0
 |     FreeBSD 2.2.8 | |     |    |            |             |
 |         |         | |     |    |            |             |
 |         v         | |     |    |        OpenBSD 2.4       |
 |     FreeBSD 2.2.9 | |     |    |            |             |
 |                   | |     |    |            |             |
FreeBSD 3.0 <--------* |     |    v            |             |
 |                     |     | NetBSD 1.3.3    |             |
 *---FreeBSD 3.1       |     |                 |             |
 |       |             |     |                 |           BSD/OS 4.0.1
 |   FreeBSD 3.2----*  |  .--*--NetBSD 1.4 OpenBSD 2.5       |
 |       |          |  |  |  |    |            |             |
 |       |          |  |  |  |    |            |             |
 |       |          |  |  |  |    |            |             |
 |   FreeBSD 3.3    |  |  |  | NetBSD 1.4.1    |             |
 |       |          |  |  |  |    |        OpenBSD 2.6       |
 |   FreeBSD 3.4    |  |  |  |    |            |             |
 |           |      |  |  |  |    |            |           BSD/OS 4.1
FreeBSD 4.0  |      |  |  |  | NetBSD 1.4.2    |             |
 |           |      |  |  |  |    |            |             |
 |           |      |  |  |  |    |            |             |
 |   FreeBSD 3.5    |  |  |  |    |        OpenBSD 2.7       |
 |           |      |  |  |  |    |            |             |
 |   FreeBSD 3.5.1  |  |  |  |    |            |             |
 |                  |  |  |  |    |            |             |
 *---FreeBSD 4.1    |  |  |  |    |            |             |
 |      |           |  |  |  |    |            |             |
 |   FreeBSD 4.1.1  |  |  /  |    |            |             |
 |      |           |  | /   |    |            |             |
 |   FreeBSD 4.2   Darwin/   | NetBSD 1.4.3    |             |
 |      |         Mac OS X   |             OpenBSD 2.8     BSD/OS 4.2
 |      |             |      |                 |             |
 |      |             |      |                 |             |
 |      |           10.0     *--NetBSD 1.5     |             |
 |   FreeBSD 4.3      |      |    |            |             |
 |      |             |      |    |        OpenBSD 2.9       |
 |      |             |      | NetBSD 1.5.1    |             |
 |      |             |      |    |            |             |
 |   FreeBSD 4.4-.    |      | NetBSD 1.5.2    |             |
 |      |        | Mac OS X  |    |            |             |
 |      |        |   10.1    |    |        OpenBSD 3.0       |
 |   FreeBSD 4.5 |    |      |    |            |             |
 |      |         \   |      |    |            |           BSD/OS 4.3
 |   FreeBSD 4.6   \  |      |    |        OpenBSD 3.1       |
 |      |           \ |      | NetBSD 1.5.3    |             |
 |   FreeBSD 4.6.2 Mac OS X  |                 |             |
 |      |            10.2    |                 |             |
 |   FreeBSD 4.7      |      |                 |             |
 |      |             |      *--NetBSD 1.6 OpenBSD 3.2       |
 |   FreeBSD 4.8      |      |    |            |             |
 |      |             |      | NetBSD 1.6.1    |             |
 |      |--------.    |      |    |        OpenBSD 3.3     BSD/OS 5.0
 |      |         \   |      |    |            |             |
 |   FreeBSD 4.9   |  |      |    |        OpenBSD 3.4     BSD/OS 5.1 ISE
 |      |          |  |      |    |            |
 |      |          |  |      | NetBSD 1.6.2    |
 |      |          |  |      |    |            |
 |      |          |  |      |    |        OpenBSD 3.5
 |      |          |  |      |    v            |
 |   FreeBSD 4.10  |  |      |                 |
 |      |          |  |      |                 |
 |   FreeBSD 4.11  |  |      |                 |
 |                 |  |      |                 |
 |                  `-|------|-----------------|---------------------.
 |                    |      |                 |                      \
FreeBSD 5.0           |      |                 |                       |
 |                    |      |                 |                       |
FreeBSD 5.1           |      |                 |               DragonFly 1.0
 |          \         |      |                 |                       |
 |           ----- Mac OS X  |                 |                       |
 |                   10.3    |                 |                       |
FreeBSD 5.2           |      |                 |                       |
 |      |             |      |                 |                       |
 |   FreeBSD 5.2.1    |      |                 |                       |
 |                    |      |                 |                       |
 *-------FreeBSD 5.3  |      |                 |                       |
 |           |        |      |             OpenBSD 3.6                 |
 |           |        |      *--NetBSD 2.0     |                       |
 |           |        |      | |  |            |               DragonFly 1.2.0
 |           |     Mac OS X  | | NetBSD 2.0.2  |                       |
 |           |       10.4    | |  |            |                       |
 |       FreeBSD 5.4  |      | |  |            |                       |
 |           |        |      | |  |        OpenBSD 3.7                 |
 |           |        |      | | NetBSD 2.0.3  |                       |
 |           |        |      | |  |            |                       |
 *--FreeBSD  |        |      | |  v        OpenBSD 3.8                 |
 |    6.0    |        |      | |               |                       |
 |     |     |        |      |  \              |                       |
 |     |     |        |      | NetBSD 2.1      |                       |
 |     |     |        |      |                 |                       |
 |     |     |        |      *--NetBSD 3.0     |                       |
 |     |     |        |      | |  |            |               DragonFly 1.4.0
 |     |     |        |      | |  |        OpenBSD 3.9                 |
 |  FreeBSD  |        |      | |  |            |                       |
 |    6.1    |        |      | |  |            |                       |
 |     |  FreeBSD 5.5 |      | |  |            |                       |
 |     |              |      | | NetBSD 3.0.1  |               DragonFly 1.6.0
 |     |              |      | |  |            |                       |
 |     |              |      | |  |        OpenBSD 4.0                 |
 |     |              |      | | NetBSD 3.0.2  |                       |
 |     |              |      | NetBSD 3.1      |                       |
 | FreeBSD 6.2        |      |                 |                       |
 |     |              |      |                 |               DragonFly 1.8.0
 |     |              |      |             OpenBSD 4.1                 |
 |     |              |      |                 |               DragonFly 1.10.0
 |     |           Mac OS X  |                 |                       |
 |     |             10.5    |                 |                       |
 |     |              |      |             OpenBSD 4.2                 |
 |     |              |      *--NetBSD 4.0     |                       |
 | FreeBSD 6.3        |      |    |            |                       |
 |            \       |      |    |            |                       |
 *--FreeBSD    |      |      |    |            |               DragonFly 1.12.0
 |    7.0      |      |      |    |            |                       |
 |     |       |      |      |    |        OpenBSD 4.3                 |
 |     |       |      |      | NetBSD          |               DragonFly 2.0.0
 |     |    FreeBSD   |      |  4.0.1      OpenBSD 4.4                 |
 |     |      6.4     |      |                 |                       |
 |     |              |      |                 |                       |
 |  FreeBSD 7.1       |      |                 |                       |
 |     |              |      |                 |               DragonFly 2.2.0
 |  FreeBSD 7.2       |      *--NetBSD     OpenBSD 4.5                 |
 |             \      |      |   5.0           |                       |
 |             \      |      |  / | \          |                       |
 |              |  Mac OS X  |  | |  \         |                       |
 |              |    10.6    |  | |   \        |                       |
 |              |     |      |  | | NetBSD     |               DragonFly 2.4.0
 |              |     |      |  | |  5.0.1 OpenBSD 4.6                 |
 |              |     |      |  | |    |       |                       |
 *--FreeBSD     |     |      |  | |    |       |                       |
 |    8.0       |     |      |  | |    |       |                       |
 |     |     FreeBSD  |      |  | | NetBSD     |                       |
 |     |       7.3    |      |  | |  5.0.2     |               DragonFly 2.6.0
 |     |        |     |      |  | |        OpenBSD 4.7                 |
 |  FreeBSD     |     |      |  | |            |                       |
 |    8.1       |     |      |  | |            |                       |
 |     |        |     |      |  | |            |               DragonFly 2.8.2
 |     |        |     |      |  | |        OpenBSD 4.8                 |
 |     |        |     |      |  | *--NetBSD    |                       |
 |  FreeBSD  FreeBSD  |      |  |    5.1       |                       |
 |    8.2      7.4    |      |  |     |        |               DragonFly 2.10.1
 |     |              |      |  |     |    OpenBSD 4.9                 |
 |     `-----.     Mac OS X  |  |     |        |                       |
 |            \      10.7    |  |     |        |                       |
 |             |      |      |  |     |    OpenBSD 5.0                 |
 *--FreeBSD    |      |      |  |     |        |                       |
 |    9.0      |      |      |  |  NetBSD      |               DragonFly 3.0.1
 |     |    FreeBSD   |      |  |   5.1.2      |                       |
 |     |      8.3     |      |  |     |        |                       |
 |     |       |      |      |  |  NetBSD      |                       |
 |     |       |      |      |  |   5.1.3      |                       |
 |     |       |      |      |  |     |        |                       |
 |     |       |      |      |  |  NetBSD      |                       |
 |     |       |      |      |  |   5.1.4      |                       |
 |     |       |      |      |  |          OpenBSD 5.1                 |
 |     |       |   Mac OS X  |  `--------.     |                       |
 |     |       |     10.8    |           |     |                       |
 |     |       |      |      *--NetBSD   |     |                       |
 |     |       |      |      |    6.0    |     |                       |
 |     |       |      |      |    | |    | OpenBSD 5.2         DragonFly 3.2.1
 |  FreeBSD    |      |      |    | | NetBSD   |                       |
 |    9.1      |      |      |    | |   5.2    |                       |
 |     |       |      |      |    | |    |     |                       |
 |     |       |      |      |    | | NetBSD   |                       |
 |     |       |      |      |    | |  5.2.1   |                       |
 |     |       |      |      |    | |    |     |                       |
 |     |       |      |      |    | | NetBSD   |                       |
 |     |       |      |      |    | |  5.2.2   |                       |
 |     |       |      |      |    | |          |                       |
 |     |       |      |      |    |  \         |                       |
 |     |       |      |      |    |   NetBSD   |                       |
 |     |       |      |      |    |    6.0.1   |                       |
 |     |       |      |      |    |      | OpenBSD 5.3         DragonFly 3.4.1
 |     |       |      |      |    |   NetBSD   |                       |
 |     |       |      |      |    |    6.0.2   |                       |
 |     |       |      |      |    |      |     |                       |
 |     |       |      |      |    |   NetBSD   |                       |
 |     |       |      |      |    |    6.0.3   |                       |
 |     |       |      |      |    |      |     |                       |
 |     |       |      |      |    |   NetBSD   |                       |
 |     |       |      |      |    |    6.0.4   |                       |
 |     |       |      |      |    |      |     |                       |
 |     |       |      |      |    |   NetBSD   |                       |
 |     |       |      |      |    |    6.0.5   |                       |
 |     |       |      |      |    |      |     |                       |
 |     |       |      |      |    |   NetBSD   |                       |
 |     |       |      |      |    |    6.0.6   |                       |
 |     |       |      |      |    |            |                       |
 |     |       |      |      |    *--NetBSD    |                       |
 |     |       |      |      |         6.1     |                       |
 |     |    FreeBSD   |      |          |      |                       |
 |     |      8.4     |      |       NetBSD    |                       |
 |     |       |      |      |        6.1.1    |                       |
 |     |              |      |          |      |                       |
 |  FreeBSD           |      |       NetBSD    |                       |
 |    9.2             |      |        6.1.2    |                       |
 |     |           Mac OS X  |          |      |                       |
 |     |             10.9    |          |  OpenBSD 5.4                 |
 |     `-----.        |      |          |      |               DragonFly 3.6.0
 |            \       |      |          |      |                       |
 *--FreeBSD    |      |      |       NetBSD    |                       |
 |   10.0      |      |      |        6.1.3    |                       |
 |     |       |      |      |          |      |                       |
 |     |       |      |      |          |      |               DragonFly 3.6.1
 |     |       |      |      |          |      |                       |
 |     |       |      |      |          |      |                       |
 |     |       |      |      |          |      |               DragonFly 3.6.2
 |     |       |      |      |       NetBSD    |                       |
 |     |       |      |      |        6.1.4    |                       |
 |     |       |      |      |          |      |                       |
 |     |       |      |      |          |  OpenBSD 5.5                 |
 |     |       |      |      |          |      |                       |
 |     |       |      |      |          |      |               DragonFly 3.8.0
 |     |       |      |      |          |      |                       |
 |     |       |      |      |          |      |                       |
 |     |       |      |      |          |      |               DragonFly 3.8.1
 |     |       |      |      |          |      |                       |
 |     |       |      |      |          |      |                       |
 |     |       |      |      |          |      |               DragonFly 3.6.3
 |     |       |      |      |          |      |                       |
 |     |    FreeBSD   |      |          |      |                       |
 |     |      9.3     |      |          |      |                       |
 |     |              |      |       NetBSD    |               DragonFly 3.8.2
 |     |              |      |        6.1.5    |                       |
 |     |           Mac OS X  |                 |                       |
 |     |             10.10   |                 |                       |
 |     |              |      |             OpenBSD 5.6                 |
 |  FreeBSD           |      |                 |                       |
 |   10.1             |      |                 |               DragonFly 4.0.1
 |     |              |      |                 |                       |
 |     |              |      |                 |               DragonFly 4.0.2
 |     |              |      |                 |                       |
 |     |              |      |                 |               DragonFly 4.0.3
 |     |              |      |                 |                       |
 |     |              |      |                 |               DragonFly 4.0.4
 |     |              |      |                 |                       |
 |     |              |      |                 |               DragonFly 4.0.5
 |     |              |      |                 |                       |
 |     |              |      |             OpenBSD 5.7                 |
 |     |              |      |                 |               DragonFly 4.2.0
 |  FreeBSD           |      |                 |                       |
 |   10.2             |      |                 |                       |
 |     |            macOS    *--NetBSD 7.0     |                       |
 |     |            10.11    |   | |       OpenBSD 5.8                 |
 |     |              |      |   | `--.        |               DragonFly 4.4.1
 |  FreeBSD           |      |   |    |    OpenBSD 5.9                 |
 |   10.3             |      |   |    |        |                       |
 |     |              |      |   | NetBSD      |                       |
 |     |              |      |   |  7.0.1      |                       |
 |     `------.       |      |   |    |        |               DragonFly 4.6.0
 |            |       |      |   |    |        |                       |
 |            |       |      |   |    |        |                       |
 *--FreeBSD   |     macOS    |   |    |    OpenBSD 6.0                 |
 |   11.0     |     10.12    |   | NetBSD      |                       |
 |     |      |       |      |   |  7.0.2      |                       |
 |     |      |       |      |   |             |                       |
 |     |      |       |      |   *--NetBSD     |                       |
 |     |      |       |      |   |   7.1       |                       |
 |     |      |       |      |   |    |        |                       |
 |     |      |       |      |   |    |        |                       |
 |     |      |     macOS    |   |    |        |               DragonFly 4.8.0
 |     |      |     10.13    |   |    |    OpenBSD 6.1                 |
 |  FreeBSD   |       |      |   |    |        |               DragonFly 5.0.0
 |   11.1  FreeBSD    |      |   |    |        |                       |
 |     |    10.4      |      |   |    |    OpenBSD 6.2         DragonFly 5.0.1
 |     |              |      |   |    |        |                       |
 |     `------.       |      |   | NetBSD      |               DragonFly 5.0.2
 |            |       |      |   |  7.1.1      |                       |
 |            |       |      |   |    |        |                       |
 |            |       |      |   | NetBSD      |                       |
 |            |       |      |   |  7.1.2      `--.                    |
 |            |       |      |   |                |                    |
 |            |       |      |   `-----.      OpenBSD 6.3              |
 |            |       |      *--NetBSD |          |            DragonFly 5.2.0
 |            |       |      |   8.0   |          |                    |
 |            |       |      |   |     |          |            DragonFly 5.2.1
 |            |       |      |   |     |          |                    |
 |            |       |      |   |     |          |            DragonFly 5.2.2
 |         FreeBSD    |      |   |     *--NetBSD  |                    |
 |           11.2     |      |   |         7.2    |                    |
 |            |     macOS    |   |                |                    |
 |            |     10.14    |   |            OpenBSD 6.4              |
 |            |       |      |   |                |                    |
 |            |       |      |   |                |            DragonFly 5.4.0
 *--FreeBSD   |       |      |   |                |                    |
 |   12.0     |       |      |   |                |            DragonFly 5.4.1
 |     |      |       |      |   |            OpenBSD 6.5              |
 |     |      |       |      |   |                |                    |
 |     |      |       |      |  NetBSD            |                    |
 |     |      |       |      |   8.1              |            DragonFly 5.6
 |     |      |       |      |   |                |                    |
 |     |      |       |      |   |                |            DragonFly 5.6.1
 |     |   FreeBSD  macOS    |   |                |                    |
 |     |     11.3   10.15    |   |                |                    |
 |  FreeBSD   |       |      |   |            OpenBSD 6.6              |
 |   12.1     |     macOS    |   `-------.        |                    |
 |     |      |    10.15.1   |           |        |            DragonFly 5.6.2
 |     |      |       |      *--NetBSD   |        |                    |
 |     |      |       |      |   9.0     |        |                    |
 |     |      |       |      |    |      |        |                    |
 |     |      |       |      |    |      |        |            DragonFly 5.8
 |     |      |       |      |    |      |        |                    |
 |     |      |       |      |    |      |        |            DragonFly 5.6.3
 |     |      |       |      |    |    NetBSD     |                    |
 |     |      |       |      |    |     8.2       |                    |
 |     |      |       |      |    |               |            DragonFly 5.8.1
 |     |      |       |      |    |           OpenBSD 6.7              |
 |     |   FreeBSD    |      |    |               |                    |
 |     |     11.4     |      |    |               |                    |
 |     |              |      |    |               |            DragonFly 5.8.2
 |     |              |      |    |               |            DragonFly 5.8.3
 |     |              |      |  NetBSD 9.1    OpenBSD 6.8              |
 |  FreeBSD         macOS    |    |               |                    |
 |   12.2            11      |    |               |                    |
 |     |              |      |    |               |                    |
 |     `------.       |      |    |               |                    |
 |            |       |      |    |               |                    |
 *--FreeBSD   |       |      |    |               |                    |
 |   13.0     |       |      |  NetBSD 9.2    OpenBSD 6.9      DragonFly 6.0.0
 |     |      |       |      |    |               |                    |
 |     |      |       |      |    |               |            DragonFly 6.0.1
 |     |      |       |      |    |               |                    |
 |     |   FreeBSD  macOS    |    |           OpenBSD 7.0              |
 |     |     12.3    12      |    |               |                    |
 |     |      |       |      |    |               |            DragonFly 6.2.1
 |     |      |       |      |    |           OpenBSD 7.1              |
 |  FreeBSD   |       |      |    |               |                    |
 |   13.1     |       |      |    |               |                    |
 |     |      |       |      |    |               |            DragonFly 6.2.2
 |     |      |       |      |  NetBSD 9.3        |                    |
 |     |      |     macOS    |                OpenBSD 7.2              |
 |     |      |      13      |                    |                    |
 |     |   FreeBSD    |      |                    |                    |
 |     |     12.4     |      |                    |                    |
 |     |              |      |                    |            DragonFly 6.4.0
 |     |              |      |                OpenBSD 7.3              |
 |  FreeBSD           |      |                    |                    |
 |   13.2             |      |                    |                    |
 |                  macOS    |                    |                    |
 |                   14      |                    |                    |
 |                    |      |                OpenBSD 7.4              |
 *--FreeBSD           |      |                    |                    |
 |   14.0             |      |                    |                    |
 |                    |      |                    |                    |
FreeBSD 15 -current   |  NetBSD -current   OpenBSD -current    DragonFly -current
 |                    |      |                    |                    |
 v                    v      v                    v                    v

2. Time

Time tolerance +/- 6 months, depending on which book/article you read; if it was the announcement in Usenet or if it was available as tape.

[44B] McKusick, Marshall Kirk, Keith Bostic, Michael J Karels, and John Quarterman. The Design and Implementation of the 4.4BSD Operating System.

[APL] Apple website https://www.apple.com/macosx/

[BSDI] Berkeley Software Design, Inc.

[DFB] DragonFlyBSD Project, The.

[DOC] README, COPYRIGHT on tape.

[FBD] FreeBSD Project, The.

[KB] Keith Bostic. BSD2.10 available from Usenix. comp.unix.sources, Volume 11, Info 4, April, 1987.

[KKK] Mike Karels, Kirk McKusick, and Keith Bostic. tahoe announcement. comp.bugs.4bsd.ucb-fixes, June 15, 1988.

[KSJ] Michael J. Karels, Carl F. Smith, and William F. Jolitz. Changes in the Kernel in 2.9BSD. Second Berkeley Software Distribution UNIX Version 2.9, July, 1983.

[NBD] NetBSD Project, The.

[OBD] OpenBSD Project, The.

[QCU] Salus, Peter H. A quarter century of UNIX. ISBN 0201547775, EAN 9780201547771

[SMS] Steven M. Schultz. 2.11BSD, UNIX for the PDP-11.

[TUHS] The Unix Historical Society. https://minnie.tuhs.org/Unix_History/

[USE] Usenet announcement.

[WRS] Wind River Systems, Inc.

[dmr] Dennis Ritchie, via E-Mail

Multics                 1965
UNIX                    Summer 1969
                DEC PDP-7
First   Edition         1971-11-03 [QCU]
                DEC PDP-11/20, Assembler
Second  Edition         1972-06-12 [QCU]
                10 UNIX installations
Third   Edition         1973-02-xx [QCU]
                Pipes, 16 installations
Fourth  Edition         1973-11-xx [QCU]
                rewriting in C effected,
                                above 30 installations
Fifth   Edition         1974-06-xx [QCU]
                above 50 installations
Sixth   Edition         1975-05-xx [QCU]
                port to DEC Vax
Seventh Edition         1979-01-xx [QCU] 1979-01-10 [TUHS]
                first portable UNIX
Eighth  Edition         1985-02-xx [QCU]
                VAX 11/750, VAX 11/780 [dmr]
                descended from 4.1c BSD [dmr]
                descended from 4.1 BSD [44B]
            scooping-out and replacement of the character-device
            and networking part by the streams mechanism

Ninth   Edition         1986-09-xx [QCU]
Tenth   Edition         1989-10-xx [QCU]

1BSD                    late 1977
            1978-01-16 [DOC]
            1978-03-09 [QCU]
                PDP-11, Pascal, ex(1)
                30 free copies of 1BSD sent out
                35 tapes sold for 50 USD [QCU]
2BSD                    mid 1978 [QCU] 1979-05-10 [TUHS]
                75 2BSD tapes shipped
2.79BSD         1980-04-xx [TUHS]
2.8BSD          1981-07-xx [KSJ]
                First 2BSD with bootable V7 kernel plus
                community fixes.
2.8.1BSD        1982-01-xx [QCU]
                set of performance improvements
2.9BSD          1983-07-xx [KSJ]
2.9.1BSD                1983-11-xx [TUHS]
2.9BSD-Seismo       1985-08-xx [SMS]
2.10BSD         1987-04-xx [KKK]
2.10.1BSD       1989-01-xx [SMS]
2.11BSD         1991-03-14 [SMS]
2.11BSD rev #430    1999-12-13 [SMS]

32V         1978-1[01]-xx [QCU] 1979-03-26 [TUHS]
3BSD                    late 1979 [QCU] March 1980 [TUHS]
                virtual memory, page replacement,
                            demand paging
4.0BSD                  1980-10-xx
4.1BSD                  1981-07-08 [DOC]
4.1aBSD                 1982-04-xx
                alpha release, 100 sites, networking [44B]
4.1bBSD             internal release, fast filesystem [44B]
4.1cBSD                 late 1982
                beta release, IPC [44B]
4.2BSD                  1983-09-xx [QCU]
                        1983-08-03 [DOC]
4.3BSD                  1986-06-xx [QCU]
            1986-04-05 [KB], [DOC]
4.3BSD Tahoe            1988-06-15 [QCU], [DOC]
4.3BSD NET/1            1988-11-xx [QCU]
                        1989-01-01 [DOC]
4.3BSD Reno             1990-06-29 [QCU], [DOC]
4.3BSD NET/2            1991-06-28 [QCU], [DOC]

BSD/386 ALPHA       1991-12-xx [BSDI]
                first code released to people outside BSDI
386BSD 0.0              1992-02-xx [DOC]
BSD/386 0.3.1           1992-04-xx [BSDI] first ext. beta; B customers
BSD/386 0.3.3       1992-06-xx [BSDI] first CDROM version
386BSD 0.1              1992-07-28 [DOC]
4.4BSD Alpha            1992-07-07
BSD/386 0.9.3       1992-10-xx [BSDI]
                first external gamma; G customers
BSD/386 0.9.4       1992-12-xx [BSDI]
                would have been 1.0 except for request
                for preliminary injunction
BSD/386 1.0         1993-03-xx [BSDI]
                injunction denied; first official release
NetBSD 0.8              1993-04-20 [NBD]
4.4BSD                  1993-06-01 [USE]
NetBSD 0.9              1993-08-23 [NBD]
FreeBSD 1.0     1993-11-01 [FBD]
FreeBSD 1.0.2       1993-11-14 [FBD]
                supersedes 1.0 13 days after release.
BSD/386 1.1     1994-02-xx [BSDI]
4.4BSD Lite             1994-03-01 [USE]
FreeBSD 1.1     1994-05-07 [FBD]
FreeBSD 1.1.5       1994-06-30 [FBD]
FreeBSD 1.1.5.1     1994-07-05 [FBD]
                supersedes 1.1.5 5 days after release.
NetBSD 1.0              1994-10-26 [NBD]
386BSD 1.0              1994-11-12 [USE]
FreeBSD 2.0     1994-11-23 [FBD]
BSD/OS 2.0      1995-01-xx [BSDI] 4.4 lite based
FreeBSD 2.0.5       1995-06-10 [FBD]
BSD/OS 2.0.1        1995-06-xx [BSDI]
4.4BSD Lite Release 2   1995-06-xx [44B]
                the true final distribution from the CSRG
FreeBSD 2.1.0       1995-11-19 [FBD]
NetBSD 1.1              1995-11-26 [NBD]
BSD/OS 2.1      1996-01-xx [BSDI]
FreeBSD 2.1.5       1996-07-14 [FBD]
NetBSD 1.2              1996-10-04 [NBD]
OpenBSD 2.0             1996-10-18 [OBD]
FreeBSD 2.1.6       1996-11-16 [FBD]
FreeBSD 2.1.6.1     1996-11-25 [FBD] (sendmail security release)
Rhapsody        1997-xx-xx
FreeBSD 2.1.7       1997-02-20 [FBD]
BSD/OS 3.0      1997-02-xx [BSDI] 4.4 lite2 based
FreeBSD 2.2.0       1997-03-16 [FBD]
FreeBSD 2.2.1       1997-03-25 [FBD]
FreeBSD 2.2.2       1997-05-16 [FBD]
NetBSD 1.2.1            1997-05-20 [NBD] (patch release)
OpenBSD 2.1             1997-06-01 [OBD]
FreeBSD 2.2.5       1997-10-22 [FBD]
OpenBSD 2.2             1997-12-01 [OBD]
NetBSD 1.3              1998-01-04 [NBD]
FreeBSD 2.2.6       1998-03-25 [FBD]
NetBSD 1.3.1            1998-03-09 [NBD] (patch release)
BSD/OS 3.1      1998-03-xx [BSDI]
OpenBSD 2.3             1998-05-19 [OBD]
NetBSD 1.3.2            1998-05-29 [NBD] (patch release)
FreeBSD 2.2.7       1998-07-22 [FBD]
BSD/OS 4.0      1998-08-xx [BSDI]
                2-lock MP support, ELF executables
FreeBSD 3.0     1998-10-16 [FBD]
                FreeBSD-3.0 is a snapshot from -current,
                while 3.1 and 3.2 are from 3.x-stable which
                was branched quite some time after 3.0-release
FreeBSD 2.2.8           1998-11-29 [FBD]
OpenBSD 2.4             1998-12-01 [OBD]
NetBSD 1.3.3            1998-12-23 [NBD] (patch release)
FreeBSD 3.1     1999-02-15 [FBD]
BSD/OS 4.0.1        1999-03-xx [BSDI]
NetBSD 1.4              1999-05-12 [NBD]
FreeBSD 3.2             1999-05-17 [FBD]
OpenBSD 2.5             1999-05-19 [OBD]
NetBSD 1.4.1            1999-08-26 [NBD] (patch release)
FreeBSD 3.3             1999-09-17 [FBD]
OpenBSD 2.6             1999-12-01 [OBD]
FreeBSD 3.4             1999-12-20 [FBD]
BSD/OS 4.1      1999-12-xx [BSDI]
FreeBSD 4.0             2000-03-13 [FBD]
NetBSD 1.4.2            2000-03-19 [NBD] (patch release)
OpenBSD 2.7             2000-06-15 [OBD]
FreeBSD 3.5     2000-06-24 [FBD]
FreeBSD 4.1     2000-07-27 [FBD]
FreeBSD 3.5.1       2000-07-28 [FBD]
FreeBSD 4.1.1       2000-09-25 [FBD] (a network-only patch release)
FreeBSD 4.2         2000-11-21 [FBD]
NetBSD 1.4.3        2000-11-25 [NBD] (patch release)
BSD/OS 4.2      2000-11-29 [BSDI]
OpenBSD 2.8     2000-12-01 [OBD]
NetBSD 1.5              2000-12-06 [NBD]
Mac OS X 10.0           2001-03-24 [APL]
FreeBSD 4.3         2001-04-20 [FBD]
OpenBSD 2.9         2001-06-01 [OBD]
NetBSD 1.5.1        2001-07-11 [NBD] (patch release)
NetBSD 1.5.2        2001-09-13 [NBD] (patch release)
FreeBSD 4.4         2001-09-18 [FBD]
Mac OS X 10.1       2001-09-29 [APL]
OpenBSD 3.0     2001-12-01 [OBD]
FreeBSD 4.5         2002-01-29 [FBD]
BSD/OS 4.3      2002-03-14 [WRS]
OpenBSD 3.1     2002-05-19 [OBD]
FreeBSD 4.6         2002-06-15 [FBD]
NetBSD 1.5.3        2002-07-22 [NBD] (patch release)
FreeBSD 4.6.2       2002-08-15 [FBD] (patch release)
Mac OS X 10.2       2002-08-23 [APL]
NetBSD 1.6      2002-09-14 [NBD]
FreeBSD 4.7     2002-10-08 [FBD]
OpenBSD 3.2     2002-11-01 [OBD]
FreeBSD 5.0     2003-01-17 [FBD]
                FreeBSD 5.0 is a separate branch off of
                -current, similar to 3.0.
FreeBSD 4.8     2003-04-03 [FBD]
NetBSD 1.6.1        2003-04-21 [NBD] (patch release)
OpenBSD 3.3     2003-05-01 [OBD]
BSD/OS 5.0      2003-05-?? [WRS]
FreeBSD 5.1     2003-06-09 [FBD]
Mac OS X 10.3       2003-10-24 [APL]
FreeBSD 4.9     2003-10-28 [FBD]
BSD/OS 5.1 ISE      2003-10-?? [WRS] (final version)
OpenBSD 3.4     2003-11-01 [OBD]
FreeBSD 5.2     2004-01-12 [FBD]
FreeBSD 5.2.1       2004-02-22 [FBD] (patch release)
NetBSD 1.6.2        2004-03-01 [NBD] (patch release)
OpenBSD 3.5     2004-04-01 [OBD]
FreeBSD 4.10        2004-05-27 [FBD]
DragonFly 1.0       2004-07-12 [DFB]
OpenBSD 3.6     2004-10-29 [OBD]
FreeBSD 5.3     2004-11-06 [FBD]
NetBSD 2.0      2004-12-09 [NBD]
FreeBSD 4.11        2005-01-25 [FBD]
DragonFly 1.2.0     2005-04-08 [DFB]
NetBSD 2.0.2        2005-04-14 [NBD] (security/critical release)
Mac OS X 10.4       2005-04-29 [APL]
FreeBSD 5.4     2005-05-09 [FBD]
OpenBSD 3.7     2005-05-19 [OBD]
NetBSD 2.0.3        2005-10-31 [NBD] (security/critical release)
OpenBSD 3.8     2005-11-01 [OBD]
FreeBSD 6.0     2005-11-01 [FBD]
NetBSD 2.1      2005-11-02 [NBD]
NetBSD 3.0      2005-12-23 [NBD]
DragonFly 1.4.0     2006-01-08 [DFB]
FreeBSD 2.2.9       2006-04-01 [FBD]
OpenBSD 3.9     2006-05-01 [OBD]
FreeBSD 6.1     2006-05-08 [FBD]
FreeBSD 5.5     2006-05-25 [FBD]
NetBSD 3.0.1        2006-07-24 [NBD] (security/critical release)
DragonFly 1.6.0     2006-07-24 [DFB]
OpenBSD 4.0     2006-11-01 [OBD]
NetBSD 3.0.2        2006-11-04 [NBD] (security/critical release)
NetBSD 3.1      2006-11-04 [NBD]
FreeBSD 6.2     2007-01-15 [FBD]
DragonFly 1.8.0     2007-01-30 [DFB]
OpenBSD 4.1     2007-05-01 [OBD]
DragonFly 1.10.0    2007-08-06 [DFB]
Mac OS X 10.5       2007-10-26 [APL]
OpenBSD 4.2     2007-11-01 [OBD]
NetBSD 4.0      2007-12-19 [NBD]
FreeBSD 6.3     2008-01-18 [FBD]
DragonFly 1.12.0    2008-02-26 [DFB]
FreeBSD 7.0     2008-02-27 [FBD]
OpenBSD 4.3     2008-05-01 [OBD]
DragonFly 2.0.0     2008-07-21 [DFB]
OpenBSD 4.4     2008-11-01 [OBD]
FreeBSD 6.4     2008-11-28 [FBD]
FreeBSD 7.1     2009-01-04 [FBD]
DragonFly 2.2.0     2009-02-17 [DFB]
NetBSD 5.0      2009-04-29 [NBD]
OpenBSD 4.5     2009-05-01 [OBD]
FreeBSD 7.2     2009-05-04 [FBD]
Mac OS X 10.6       2009-06-08 [APL]
NetBSD 5.0.1        2009-08-02 [NBD] (security/critical release)
DragonFly 2.4.0     2009-09-16 [DFB]
OpenBSD 4.6     2009-10-18 [OBD]
FreeBSD 8.0     2009-11-26 [FBD]
NetBSD 5.0.2        2010-02-12 [NBD] (security/critical release)
FreeBSD 7.3     2010-03-23 [FBD]
DragonFly 2.6.0     2010-03-28 [DFB]
OpenBSD 4.7     2010-05-19 [OBD]
FreeBSD 8.1     2010-07-24 [FBD]
DragonFly 2.8.2     2010-10-30 [DFB]
OpenBSD 4.8     2010-11-01 [OBD]
NetBSD 5.1      2010-11-19 [NBD]
FreeBSD 7.4     2011-02-24 [FBD]
FreeBSD 8.2     2011-02-24 [FBD]
DragonFly 2.10.1    2011-04-26 [DFB]
OpenBSD 4.9     2011-05-01 [OBD]
Mac OS X 10.7       2011-07-20 [APL]
OpenBSD 5.0     2011-11-01 [OBD]
FreeBSD 9.0     2012-01-12 [FBD]
NetBSD 5.1.2        2012-02-02 [NBD] (security/critical release)
DragonFly 3.0.1     2012-02-21 [DFB]
FreeBSD 8.3     2012-04-18 [FBD]
OpenBSD 5.1     2012-05-01 [OBD]
Mac OS X 10.8       2012-07-25 [APL]
NetBSD 6.0      2012-10-17 [NBD]
OpenBSD 5.2     2012-11-01 [OBD]
DragonFly 3.2.1     2012-11-02 [DFB]
NetBSD 5.2      2012-12-03 [NBD]
NetBSD 6.0.1        2012-12-26 [NBD] (security/critical release)
FreeBSD 9.1     2012-12-30 [FBD]
DragonFly 3.4.1     2013-04-29 [DFB]
OpenBSD 5.3     2013-05-01 [OBD]
NetBSD 6.0.2        2013-05-18 [NBD] (security/critical release)
NetBSD 6.1      2013-05-18 [NBD]
FreeBSD 8.4     2013-06-07 [FBD]
NetBSD 6.1.1        2013-08-22 [NBD]
NetBSD 5.1.3        2013-09-29 [NBD]
NetBSD 5.2.1        2013-09-29 [NBD]
FreeBSD 9.2     2013-09-30 [FBD]
NetBSD 6.0.3        2013-09-30 [NBD]
NetBSD 6.1.2        2013-09-30 [NBD]
Mac OS X 10.9       2013-10-22 [APL]
OpenBSD 5.4     2013-11-01 [OBD]
DragonFly 3.6.0     2013-11-25 [DFB]
FreeBSD 10.0        2014-01-20 [FBD]
NetBSD 5.1.4        2014-01-25 [NBD]
NetBSD 5.2.2        2014-01-25 [NBD]
NetBSD 6.0.4        2014-01-25 [NBD]
NetBSD 6.1.3        2014-01-25 [NBD]
DragonFly 3.6.1     2014-02-22 [DFB]
DragonFly 3.6.2     2014-04-10 [DFB]
NetBSD 6.0.5        2014-04-12 [NBD]
NetBSD 6.1.4        2014-04-12 [NBD]
OpenBSD 5.5     2014-05-01 [OBD]
DragonFly 3.8.0     2014-06-04 [DFB]
DragonFly 3.8.1     2014-06-16 [DFB]
DragonFly 3.6.3     2014-06-17 [DFB]
FreeBSD 9.3     2014-07-05 [FBD]
DragonFly 3.8.2     2014-08-08 [DFB]
NetBSD 6.0.6        2014-09-22 [NBD]
NetBSD 6.1.5        2014-09-22 [NBD]
Mac OS X 10.10      2014-10-16 [APL]
OpenBSD 5.6     2014-11-01 [OBD]
FreeBSD 10.1        2014-11-14 [FBD]
DragonFly 4.0.1     2014-11-25 [DFB]
DragonFly 4.0.2     2015-01-07 [DFB]
DragonFly 4.0.3     2015-01-21 [DFB]
DragonFly 4.0.4     2015-03-09 [DFB]
DragonFly 4.0.5     2015-03-23 [DFB]
OpenBSD 5.7     2015-05-01 [OBD]
DragonFly 4.2.0     2015-06-29 [DFB]
FreeBSD 10.2            2015-08-13 [FBD]
NetBSD 7.0      2015-09-25 [NBD]
OS X 10.11      2015-09-30 [APL]
OpenBSD 5.8     2015-10-18 [OBD]
DragonFly 4.4.1     2015-12-07 [DFB]
OpenBSD 5.9     2016-03-29 [OBD]
FreeBSD 10.3        2016-04-04 [FBD]
NetBSD 7.0.1        2016-05-22 [NBD]
DragonFly 4.6.0     2016-08-02 [DFB]
OpenBSD 6.0     2016-09-01 [OBD]
macOS 10.12     2016-09-20 [APL]
FreeBSD 11.0        2016-10-10 [FBD]
NetBSD 7.0.2        2016-10-21 [NBD]
NetBSD 7.1      2017-03-11 [NBD]
DragonFly 4.8.0     2017-03-27 [DFB]
OpenBSD 6.1     2017-04-11 [OBD]
FreeBSD 11.1        2017-07-26 [FBD]
macOS 10.13     2017-09-25 [APL]
FreeBSD 10.4        2017-10-03 [FBD]
OpenBSD 6.2     2017-10-09 [OBD]
DragonFly 5.0.0     2017-10-16 [DFB]
DragonFly 5.0.1     2017-11-06 [DFB]
DragonFly 5.0.2     2017-12-04 [DFB]
NetBSD 7.1.1        2017-12-22 [NBD]
NetBSD 7.1.2        2018-03-15 [NBD]
OpenBSD 6.3     2018-04-02 [OBD]
DragonFly 5.2.0     2018-04-10 [DFB]
DragonFly 5.2.1     2018-05-20 [DFB]
DragonFly 5.2.2     2018-06-18 [DFB]
FreeBSD 11.2        2018-06-27 [FBD]
NetBSD 8.0      2018-07-17 [NBD]
NetBSD 7.2      2018-08-29 [NBD]
macOS 10.14     2018-09-24 [APL]
OpenBSD 6.4     2018-10-18 [OBD]
DragonFly 5.4.0     2018-12-03 [DFB]
FreeBSD 12.0        2018-12-11 [FBD]
DragonFly 5.4.1     2018-12-24 [DFB]
OpenBSD 6.5     2019-05-01 [OBD]
NetBSD 8.1      2019-06-04 [NBD]
DragonFly 5.6       2019-06-17 [DFB]
DragonFly 5.6.1     2019-06-19 [DFB]
FreeBSD 11.3        2019-07-09 [FBD]
DragonFly 5.6.2     2019-08-11 [DFB]
OpenBSD 6.6     2019-10-17 [OBD]
macOS 10.15     2019-10-07 [APL]
macOS 10.15.1       2019-10-29 [APL] (security/critical release)
FreeBSD 12.1        2019-11-04 [FBD]
NetBSD 9.0      2020-02-14 [NBD]
DragonFly 5.8       2020-03-03 [DFB]
DragonFly 5.6.3     2020-03-11 [DFB]
NetBSD 8.2      2020-03-31 [NBD]
DragonFly 5.8.1     2020-05-06 [DFB]
OpenBSD 6.7     2020-05-19 [OBD]
FreeBSD 11.4        2020-06-16 [FBD]
DragonFly 5.8.2     2020-09-23 [DFB]
DragonFly 5.8.3     2020-09-24 [DFB]
OpenBSD 6.8     2020-10-18 [OBD]
NetBSD 9.1      2020-10-18 [NBD]
FreeBSD 12.2        2020-10-27 [FBD]
macOS 11        2020-11-19 [APL]
FreeBSD 13.0        2021-04-13 [FBD]
OpenBSD 6.9     2021-05-01 [OBD]
DragonFly 6.0       2021-05-08 [DFB]
NetBSD 9.2      2021-05-12 [NBD]
DragonFly 6.0.1     2021-10-12 [DFB]
OpenBSD 7.0     2021-10-14 [OBD]
macOS 12        2021-10-25 [APL]
FreeBSD 12.3        2021-12-01 [FBD]
DragonFly 6.2.1     2022-01-09 [DFB]
OpenBSD 7.1     2022-04-21 [OBD]
FreeBSD 13.1        2022-05-17 [FBD]
DragonFly 6.2.2     2022-06-09 [DFB]
NetBSD 9.3      2022-08-04 [NBD]
OpenBSD 7.2     2022-10-20 [OBD]
macOS 13        2022-10-24 [APL]
FreeBSD 12.4        2022-12-05 [FBD]
DragonFly 6.4       2022-12-30 [DFB]
OpenBSD 7.3     2023-04-10 [OBD]
FreeBSD 13.2        2023-04-11 [FBD]
macOS 14        2023-09-26 [APL]
OpenBSD 7.4     2023-10-16 [OBD]
FreeBSD 14.0        2023-11-20 [FBD]

3. Bibliography

  • Leffler, Samuel J., Marshall Kirk McKusick, Michael J Karels and John Quarterman. The Design and Implementation of the 4.3BSD UNIX Operating System. Reading, Mass. Addison-Wesley, 1989. ISBN 0-201-06196-1

  • Salus, Peter H. A quarter century of UNIX. Addison-Wesley Publishing Company, Inc., 1994. ISBN 0-201-54777-5

  • McKusick, Marshall Kirk, Keith Bostic, Michael J Karels, and John Quarterman. The Design and Implementation of the 4.4BSD Operating System. Reading, Mass. Addison-Wesley, 1996. ISBN 0-201-54979-4

  • McKusick, Marshall Kirk, George Neville-Neil. The Design and Implementation of the FreeBSD Operating System. Addison-Wesley Professional, Published: Aug 2, 2004. ISBN 0-201-70245-2

  • McKusick, Marshall Kirk, George Neville-Neil, Robert Watson. The Design and Implementation of the FreeBSD Operating System, 2nd Edition. Pearson Education, Inc., 2014. ISBN 0-321-96897-2

  • Doug McIlroy. Research Unix Reader.

  • Michael G. Brown. The Role of BSD in the Development of Unix. Presented to the Tasmanian Unix Special Interest Group of the Australian Computer Society, Hobart, August 1993.

  • Peter H. Salus. Unix at 25. Byte Magazine, October 1994. URL: https://web.archive.org/web/20081230094857/http://www.byte.com/art/9410/sec8/art3.htm

  • Andreas Klemm, Lars Köller. If you’re going to San Francisco … Die freien BSD-Varianten von Unix. c’t April 1997, page 368ff.

  • FreeBSD Release Information URL: https://www.FreeBSD.org/releases/

  • Manual pages for FreeBSD and ports URL: https://man.FreeBSD.org/cgi/man.cgi

  • UNIX history graphing project URL: https://minnie.tuhs.org/Unix_History/index.html

  • UNIX history URL: https://www.levenez.com/unix/

  • James Howard: The BSD Family Tree URL: https://web.archive.org/web/20090427195917/http://ezine.daemonnews.org/200104/bsd_family.html (“what are the differences between FreeBSD, NetBSD, and OpenBSD?”)

4. Acknowledgments

Josh Gilliam for suggestions, bug fixes, and finding very old original BSD announcements from Usenet or tapes.

Steven M. Schultz for providing 2.8BSD, 2.10BSD, 2.11BSD manual pages.

Copyright (c) 1997-2023 Wolfram Schneider wosch@FreeBSD.org

URL: https://cgit.freebsd.org/src/tree/share/misc/bsd-family-tree

5. 历史版本

  • 2023-12-30,创建本文