[TUHS] most direct Unix descendant

[Steffen Nurpmeso]

Ralph Corderoy wrote in
 <20240606095502.AD4EE210F4 at orac.inputplus.co.uk>:
 |There's a chart of the connections between Unix versions at
 |https://en.wikipedia.org/wiki/List_of_Unix_systems, though I dislike the
 |lack of direction given there are some arcs with little incline.
 |It says it's based on https://www.levenez.com/unix/ where Éric notes his
 |chart is not limited to just source-code transfer.

I also admire that FreeBSD and NetBSD keep on maintaining the
bsd-family-tree (and in the original form, not that dots thing, or
how it was called).  So that starts with

  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
  ...

and says

  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
  ..

with a nice Bibliography with falsely underscored headline plus

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

It also covers the system most of you are using (later).

--steffen
|
|Der Kragenbaer,                The moon bear,
|der holt sich munter           he cheerfully and one by one
|einen nach dem anderen runter  wa.ks himself off
|(By Robert Gernhardt)