Gopher was not the only Internet document access and retrieval system developed in the early 1990s in parallel with the World Wide Web.
If you paid close attention back then you may have heard of Hyper-G, a now long forgotten distributed hypermedia system developed at the Graz University of Technology in Austria. It was advanced, modular and ambitious but the Web won. This overview of Hyper-G was published almost exactly 30 years ago: