On Mar 20, 2026, at 2:00 PM, John H. Reinhardt
<johnhreinhardt(a)thereinhardts.org> wrote:
I'm guessing this perhaps was one of the sources.
https://mud.fandom.com/wiki/MUD1
MUD1 (referred to as MUD1, to distinguish from
its successor, MUD2) is the oldest virtual world in existence. It was created in 1978 by
Roy Trubshaw at Essex University on a DEC PDP-10 in the UK, using the MACRO-10 assembly
language. He named the game Multi-User Dungeon, in tribute to the Dungeon variant of Zork,
which Trubshaw had greatly enjoyed playing.[1][2] Zork in turn was inspired by an older
text-adventure game known as Colossal Cave Adventure or ADVENT.[3]
John H. Reinhardt