Today is the 30th anniversary of the launch of the first wiki by Ward Cunningham. A page that anyone could edit. Right from the browser. It was generally seen as a bad idea. What if people did bad things?
Originally to support the software development community in creating a repository of software design patterns, wikis were later used for many other goals (even an encyclopedia!), and became part of Web 2.0, together with blogs, fora and social media.
Thank you, @k9ox
