Mosaic *was* the killer app for the WWW. Running on SunOS with X and a colour monitor, all the ingredients for the modern browser were there:
- Text and Images displayed together for a page
- Coloured highlighting of hyperlinks
- Forward and backward buttons, for a good sesh browsing the web
- Rendered presentation of other protocols (ftp, gopher and IIRC news)
Lynx allowed you to read from the web, but Mosaic allowed you to browse.
Its accompanying page "What's new with NCSA Mosaic" was the de facto chronicle of the expansion of the WWW over its first few years. Heady times, and the importance of NCSA in building on Cern's work was pivotal: Mosaic on the client side, NCSA server, and "What's New" in disseminating information.