Abstract: An online system displays an interface to users including slots in which sources from a list of sources of items (e.g., physical items, content items) are presented. The user may select a source via the interface to view items provided by, or associated with, the source. To simplify a user identifying a desired source, the online system includes sources that a user is likely to select as well as new sources in the list. To balance the competing interests of relevance of sources with which the user previously interacted and discovery of new sources, the online system selects an allocation of slots for new sources and for sources with prior interaction based on interactions by users in the geographic regions with different allocations of slots. Based on the selected allocation of slots, the online system selects specific retailers for each slot using ranking models corresponding to different slots.

Abstract: User input into a user interface is symbolically represented to increase security. User input received into a user interface and a mapping is applied to the user input. A result of the mapping is provided. The user interface may be updated to include the result of the mapping and/or may be provided to another device, such as over a short range communication channel. A person who views or otherwise has access to the user interface does not obtain the user input, but the result of the mapping indicates whether the user input was provided correctly.

Abstract: Input received into a first component of a user interface is mirrored in another component of the user interface. The first component of the user interface is monitored and changes to the first component are caused to occur in the second component. The first component may be configured to receive user input for an authentication claim.

Abstract: A system (30) for remotely controlling the operation of a camera (10) having a video signal tap and a lens having lens focus, zoom and T-stop adjustment motors (24, 26, 28). A digital motor driver unit (32) is connected to and controls the camera and the lens motors. A portable digital controller (34) has either a hardwire (36) or wireless connection to the motor driver unit and is sized for holding in one hand. The controller has separate controls (52, 62, 66, 70) that are manually adjustable for controlling the motor driver unit to separately and independently control the camera and the lens motors. The controller also has a display screen (56) for selectively displaying a scene from the video signal tap of the camera or data from the lens motors. The system includes a memory and processing means for selective operation with a plurality of different cameras and lenses and to calibrate the lenses to the controller and motor driver unit.

Abstract: A system (30) for remotely controlling the operation of a camera (10) having a video signal tap and a lens having lens focus, zoom and T-stop adjustment motors (24, 26, 28). A digital motor driver unit (32) is connected to and controls the camera and the lens motors. A portable digital controller (34) has either a hardwire (36) or wireless connection to the motor driver unit and is sized for holding in one hand. The controller has separate controls (52, 62, 66, 70) that are manually adjustable for controlling the motor driver unit to separately and independently control the camera and the lens motors. The controller also has a display screen (56) for selectively displaying a scene from the video signal tap of the camera or data from the lens motors. The system includes a memory and processing means for selective operation with a plurality of different cameras and lenses and to calibrate the lenses to the controller and motor driver unit.