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A social cataloging application is a web application designed to help users to catalog things--books, CDs, etc--owned or otherwise of interest to them. The phrase refers to two characteristics that generally arise from a multi-user cataloging environment:

• The ability to share catalogs and interact with others based upon shared items;
• The enrichment or improvement of cataloging description through either explicit cooperation in the production of cataloging metadata or through the analysis of implicit data (eg., "People who like X also like Y").

Some of the more notable social cataloging applications include:

• For Anime and Manga: MyAnimeList
• For books: Anobii, Books iRead, Goodreads, LibraryThing and Shelfari
• For computer and video games: MobyGames, The Backloggery
• For data: Jumper 2.0
• For devices: gdgt
• For movies: Criticker, Flixster
• For music: Discogs, Last.fm and Rate Your Music
• For scholarly citations: Bibster, CiteULike, Connotea, refbase

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