On Thursday, February 7, 2019, Grant Taylor via TUHS <tuhs@minnie.tuhs.org> wrote:

Seeing as how this is diverging from TUHS, I'd encourage replies to the COFF copy that I'm CCing.

On 02/06/2019 01:47 PM, Kevin Bowling wrote:

There were protocols that fit better in the era like DeltaT with a simpler state machine and connection handling.  Then there was a mad dash of protocol development in the mid to late ‘80s that were measured by various metrics to outperform TCP in practical and theoretical space.  Some of these seemed quite nice like XTP and are still in use in niche defense applications.

$ReadingList++

XTP was/is indeed very interesting.  It was adopted by US Navy for SAFENET and created by Greg Chesson who was active in the early UNIX community.  Not sure if we have him here on this list though.