Document Sharing applications are designed to provide access to page style content. Content shared this way may be in the form of a spreadsheet, document library, or PDF. Some applications within this category also allow for the creation of documents.
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A wiki is basically an online whiteboard. Anyone you give the url can edit and change your wiki pages or create a private wiki for just your friends or co-workers. A wiki is great for to-do lists, planing an event, project management, operations manuals, and knowledge bases!
