The Original Wikipedia

For anyone who has ever read the exceptional series, The Hitchhiker's Guide to the Galaxy, this website will be more familiar to you than anyone else. The concept behind the guide of which the stories surround is a comprehensive collection of all information available in the universe. In the story, one of the primary characters is, unbeknownst to his friend Arthur Dent, an alien writer for the guide.

Here is the online version of the guide, a website initiated by Douglas Adams. http://www.bbc.co.uk/dna/h2g2/

Now, for anyone familiar with the goals of Wikipedia the story of the guide does not appear to be the same concept, aside from being a massive collection of knowledge. It is in the realization of the H2G2 website that the community effort takes center stage. So, we can see, the core concepts of the Wiki movement may have been started in the 90's by an ingenious author.