A system and corresponding method for providing a 3-dimensional (3-D) user interface to display images in a 3-D coordinate system. The 3-D interface generates and displays one type of holographic keyboard in response to a user's desired selection. The holographic keyboard provides versatility and ergonomic benefits to the user. Sensors are configured to sense user interaction within the 3-D coordinate system, so that a processor may receive user interaction information from the sensors. The sensors are able to provide information to the processor that enables the processor to correlate user interaction with images in the 3-D coordinate system. The system may be used for interconnecting or communicating between two or more components connected to an interconnection medium (e.g., a bus) within a single computer or digital data processing system.