Abstract: An augmented reality (AR) content display system includes one or more processors configured to acquire feature points in a nearby region in which guide information for displaying an AR content is pasted, and display the region in which the feature points are acquired and the AR content in association with each other.

Abstract: An information processing system includes one or more processors configured to: receive designation of a target for which AR content is to be displayed on the basis of an operation step of a manual; associate the designated target and guide information for output for displaying the AR content; and perform control of displaying the AR content corresponding to the guide information for output in a case where the guide information for output is acquired.

Abstract: An information processing apparatus includes a processor, in which the processor is configured to specify, in a case where information for specifying data of interest is contributed to a channel that is a place where plural users are able to contribute information via a communication line or in a case where the information for specifying the data of interest is input for contribution to the channel, a notification target user based on data-related information including at least one of an operation history indicating a user who performs an operation with respect to the data of interest previously or attribute information indicating a user registered as an attribute of the data of interest, and perform notification to the notification target user after the information for specifying the data of interest is contributed.

Abstract: An information processing apparatus includes a processor configured to: identify a target user and a companion accompanying the target user, in accordance with communication log information and a user identifier of the target user, the communication log information indicating a log of short-range wireless communication of a target mobile terminal used by the target user and including a user identifier of a nearby user using a nearby mobile terminal having performed short-range wireless communication with the target mobile terminal; and provide, to the target user and/or the companion, provision information that is selected in accordance with the target user and the companion.

Abstract: A message notification device includes an update information acquisition unit and a notification unit. The update information acquisition unit is configured to, when information that uniquely specifies content is contained in a message, acquire update information as to whether or not the uniquely specified content is updated. The notification unit is configured to notify a poster who has posted the message when the update information is acquired by the update information acquisition unit.

Abstract: An information processing system includes a processor. The processor is configured to determine, for each viewer who views a video, a permitted part of the video that the viewer is permitted to view, and generate, for the viewer, an image representing part of the video and/or a video representing part of the video from the permitted part corresponding to the viewer.

Abstract: An information processing system includes a processor. The processor is configured to acquire information included in a video and/or information attached to the video, determine, for each viewer who views the video, a permitted part of the video that the viewer is permitted to view, based on the acquired information, and generate, for the viewer, control information for causing the permitted part corresponding to the viewer to be played back.

Abstract: A message notification device includes an update information acquisition unit and a notification unit. The update information acquisition unit is configured to, when information that uniquely specifies content is contained in a message, acquire update information as to whether or not the uniquely specified content is updated. The notification unit is configured to notify a poster who has posted the message when the update information is acquired by the update information acquisition unit.