What Is a Wiki? Summary: Many people collaborate on projects via e-mail. But e-mail threads can be cumbersome, attached documents can get lost, and who has the latest version anyway? Wikis allow everyone who has access to a page to read and change it. August 2, 2005 -- 23:12 GMT (16:12 PDT) Loading... Please wait. Topic: Collaboration Kick off your day with ZDNet's daily email newsletter. It's the freshest tech news and opinion, served hot. Get it.