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A mashup is a website or application that combines content from more than one source into an integrated experience. It is sometimes created as a critique or commentary on an existing work or product. The tactic owes much to previous recombinant forms including: content repurposing, most notably by Kenneth Anger in his 1963 film Scorpio Rising; DJ mixing and culture jamming. Content used in mashups is typically sourced from a third party via a public interface or API, although some in the community believe that only cases where public interfaces are not used count as mashups. Other methods of sourcing content for mashups include Web feeds (e.g. RSS or Atom) and JavaScript. Many people are experimenting with mashups using Google, eBay, Amazon, AOL, Windows Live, and Yahoos APIs.