PROBLEM TO BE SOLVED: To provide a device, a method, and a program capable of creating a book mark including period information in a viewer's favorite scene, in a program distribution service.;SOLUTION: A book mark management server 400 comprises: an annotation write receiving unit 401 which receives input of a book mark in which the broadcast channel of a program content and at least a partial period within a program are designated; an annotation storage unit 408 which stores a received book mark in association with the identifier of a viewer; and an annotation read unit 404 which reads the book mark with the identifier of the viewer as a key.;SELECTED DRAWING: Figure 5;COPYRIGHT: (C)2018,JPO&INPIT
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