Hyper-G was a distributed hypermedia system developed at the Graz University of Technology in Austria, overshadowed by the World Wide Web and now long forgotten. See this PDF overview article: Hyper-G: A Large Universal Hypermedia System and Some Spin-Offs.
Dear God that sounds horrible and amazing. I’m glad it didn’t catch on, but I really want to see it in action.
The first sentence made me think that maybe it’s something ideologically similar to IPFS and Locutus, but yes, horrible.
Such a feature was relatively common on desktop and workstation hypermedia systems.