| Social networks (e.g. Facebook, MySpace, etc.) | | | | | | | |
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| Social Bookmarking (e.g. del.icio.us, etc.) | | | | | | | |
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| Photosharing (e.g. flickr, etc.) | | | | | | | |
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| Social Citation Sharing (Connotea, Citeulike, Zotero, etc.) | | | | | | | |
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| Collaborative Document Creation (Zoho, Googledocs, wikis, etc.) | | | | | | | |
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| Mashups of data from various sources | | | | | | | |
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