Wikipedia is the largest free editable encyclopedia online consist of over 2 million articles. Wikipedia Encyclopedia can be edited by almost anyone who uses the Internet, Since it is written by users, anyone can edit, delete and arrange the articles on Wikipedia. It's a resource for a huge knowledge sharing. Almost any topics you can find on the Wikipedia. As it is a wiki which is editable, there is good and bad side of it. Good side is "Sharing information" around the world and the Bad side is "Misleading Information". The giant industries and personalities hate to see their flaws online as those flaws can be put online for the sake of everyone's knowledge. Well that is what these giant corporations and personalities are so scared of.
One American student sent major corporations, governments and even the Vatican on the defensive after coming up with Wikipedia Scanner, a software program that reveals who changed Wikipedia entries.