Abstract: Data collection is described. A network-based data collection service enables users to define and manage data collections. Data items can be selected from any type of data source (e.g., a web page, a local document, an image file, an audio file, a video file, etc.) and added to a data collection. Data items may be any type of data (e.g., text, image, sound, video, etc.). A data collection may be shared by any number of users having various access permissions to the data collection. The data collection may also be viewed as a graphical presentation of each of the data items associated with the data collection such that each data item may be resized and/or repositioned within the graphical presentation.