WorldWideWeb was later renamed Nexus to avoid confusion with the World Wide Web.
Tim Berners-Lee’s original application was called WorldWideWeb, written without spaces. The name described both the browser and the broader information system it helped introduce, creating an obvious risk of confusion as the Web became a distinct global platform rather than merely the name of one program.
When a new version of the software was released in 1994, it was renamed Nexus. The original program was unusual by modern standards because it combined Web browsing with HTML authoring: users could read pages, create links, and edit documents in the same NeXTSTEP application.
Nexus should not be confused with Mosaic, which arrived later and helped bring graphical Web browsing to a much wider audience. Arena and Viola were also names associated with other early browser projects. The renaming therefore identified the original CERN software more clearly while preserving its place in Web history.