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=What is a Wiki?= Well a wiki is sort of like a content management system (CMS) or like a blog. With a wiki you can share information with anyone who has web access. The difference between a blog and wiki is that anyone can edit, change, or delete information in a wiki. It can have more than just one author, whereas the blog only has one author and no one can edit it. People can comment on a blog, but not change or even delete the original content. A wiki is a great tool to use to gather information. You just have to be careful and validate the information since anyone can contribute to it. It has to deal a lot with Web 2.0, because Web 2.0 deals with collaboration and collective intelligence, which a wiki can fall under. People can collect information in a wiki.