US9514446B1
патент
Methods, systems, and apparatus, including computer pro grams encoded on a computer-readable storage medium, and including a method for selecting content. The method com prises anonymously linking plural identifiers, each associ ated with a user and specific requesting source. Anony mously linking includes linking at least two different identifiers associated with two different requesting sources used to access content, and linking the two different iden tifiers using an identifier not including any personally iden tifiable information. The method further comprises identi fying a user list associated with a topic and including plurality of entries, each entry satisfying the topic and having an identifier associated with a requesting source and further including information about a type of requesting Source. The method further comprises linking an entry in the user list to other identifiers using the anonymous linking, and selecting content for delivery to a user device associated with an entry in the user list based on the linking.
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