news.ycombinator.com | 2021-01-14
The initial Oberon OS is indeed from 1987, but there are many Oberons. The original Oberon GUI was the everything-is-executable-text one, not the ZUI.
The ZUI was part of Thomas M. Frey's work for his dissertation "Bluebottle : A Thread-safe Multimedia and GUI Framework for Active Oberon"  (Bluebottle OS) submitted in 2005.
This was built on top of Pieter J. Muller's work for his dissertation "The Active Object System"  (AOS) submitted in 2001.
There are many more ETH PhD and student projects based on Oberon before and after (ARM Oberon, WinOberon, UnixOberon, Oberon.NET, ...).