> Plan 9 GUIs Mostly just Acme, though. The others are kind of mediocre and don't have this mechanism. Oberon does implement something like this system-wide,

> Plan 9 GUIs Mostly just Acme, though. The others are kind of mediocre and don't have this mechanism. Oberon does implement something like this system-wide, and iirc that was the inspiration for Acme.