Any idea when
the TENEX implementation was made?
Anyway, about the first details about the TENEX TCP implementation
(done by Bill Pluumer, whom we have now sadly lost) I could find are
in IEN-67 ("Meeting Notes - 30 & 31 January 1978"):
https://www.rfc-editor.org/ien/ien67.pdf
Thanks! I found this from "19SEP76" which must have been a very
early version.