A system comprising: - a touch pad type or button type remote controller configured to generate operation information in response to an operation of switching a category, said operation being a flicking operation, in case of a touch pad type remote controller, or an operation of pressing a category switching button, in case of a button type remote controller, and - an information processing apparatus comprising: a server communication unit configured to acquire content information from a server, - the content information including thumbnails, category information for indicating the respective category to which content corresponding to the thumbnails belongs and group information for grouping the thumbnails of the content belonging to a category; a controller communication unit configured to receive the operation information from the remote controller; an operation detection unit configured to detect a user's operation based on the operation information received from the remote controller; and a display control unit configured to display content in a part including a middle of a display screen and display the thumbnails corresponding to content belonging to one category indicated by the category information in one direction along one side of the display screen in a manner that the thumbnails overlap the displayed content, wherein the display control unit is configured to display the thumbnails in a manner that the user recognizes a group to which content corresponding to the thumbnails belongs based on the group information, and move the displayed thumbnails in a vertical direction with respect to the one direction according to the user's operation which is detected by the operation detection unit and is an operation of switching the one category to which the content corresponding to the displayed thumbnails belongs. - a touch pad type or button type remote controller configured to generate operation information in response to an operation of switching a category, said operation being a flicking operation, in case of a touch pad type remote controller, or an operation of pressing a category switching button, in case of a button type remote controller, and - an information processing apparatus comprising: a server communication unit configured to acquire content information from a server, - the content information including thumbnails, category information for indicating the respective category to which content corresponding to the thumbnails belongs and group information for grouping the thumbnails of the content belonging to a category; a controller communication unit configured to receive the operation information from the remote controller; an operation detection unit configured to detect a user's operation based on the operation information received from the remote controller; and a display control unit configured to display content in a part including a middle of a display screen and display the thumbnails corresponding to content belonging to one category indicated by the category information in one direction along one side of the display screen in a manner that the thumbnails overlap the displayed content, wherein the display control unit is configured to display the thumbnails in a manner that the user recognizes a group to which content corresponding to the thumbnails belongs based on the group information, and move the displayed thumbnails in a vertical direction with respect to the one direction according to the user's operation which is detected by the operation detection unit and is an operation of switching the one category to which the content corresponding to the displayed thumbnails belongs. a server communication unit configured to acquire content information from a server, - the content information including thumbnails, category information for indicating the respective category to which content corresponding to the thumbnails belongs and group information for grouping the thumbnails of the content belonging to a category; a controller communication unit configured to receive the operation information from the remote controller; an operation detection unit configured to detect a user's operation based on the operation information received from the remote controller; and a display control unit configured to display content in a part including a middle of a display screen and display the thumbnails corresponding to content belonging to one category indicated by the category information in one direction along one side of the display screen in a manner that the thumbnails overlap the displayed content, wherein the display control unit is configured to display the thumbnails in a manner that the user recognizes a group to which content corresponding to the thumbnails belongs based on the group information, and move the displayed thumbnails in a vertical direction with respect to the one direction according to the user's operation which is detected by the operation detection unit and is an operation of switching the one category to which the content corresponding to the displayed thumbnails belongs.