Systems and techniques for aggregation, display, and sharing of data. Graphic items representing data objects identified by a data package may be displayed on timelines. Each timeline may be associated with a respective class of data, and each graphic item displayed on a respective timeline may represent one or more of the data objects in the class associated with the respective timeline. A prediction may be made regarding which data will be displayed in the near future. A pre-fetch request may be generated, and the predicted data may be retrieved from a remote server and stored in a local data cache before the user requests that the predicted data be displayed.