A screen shot taken from a NeXT computer running Tim Berners-Lee's original WorldWideWeb browser. It has taken a long time for technology to catch up with Berners-Lee's original vision. The first ever web browser was also an editor, making the web an interactive medium, the problem was that it only ran on the NeXTStep operating system. With recent phenomena like blogs and wikis, the web is beginning to develop the kind of collaborative nature that its inventor envisaged from the start.
See also a screen shot taken later, in 1993.