A method for providing product information comprises establishing a local reference frame which defines a space including a product identifier and a portable display device, receiving a request for product information corresponding to the product identifier from the portable display device, determining a position of the portable display device in relation to the local reference frame, and providing the product information via the portable display device according to the position of the portable display device.

 
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> Video conferencing system using video manager to provide picture-in-picture image to display devices located remotely from co-located computing systems
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