WorldWideWeb (a.k.a The Nexus), 1991
Now comparatively slow and sluggish two decades after its launch, ARPANET was dead by 1990. In its place stood newer, fresher networking technologies and concepts, including something out of Switzerland that would not only stand the test of time but forever alter our culture. It was called the World Wide Web, and it was "invented" in 1989 by Tim Berners-Lee, a British scientist at the Swiss-based physics research facility CERN.
Two years later, the World Wide Web had its first browser, the WorldWideWeb (note the lack of spaces). Also a Berners-Lee creation, the WorldWideWeb was the first readily available eye into the circa-1991 online world—a world that consisted primarily of CERN-centric information and zero porn sites.