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The objects and surfaces of a task-based environment can be layered with digital interfaces to make them easier and safer to use. Once information can be projected anywhere in the space, it becomes crucial to design the information to make optimal use of users' attention. We have prototyped and evaluated a real-world augmented reality kitchen where user-centered interfaces and displays can be projected anywhere in the space to improve its usability. The augmented environment is designed to support the activities of a variety of people in diverse kitchen environments.This paper presents five intelligent kitchen systems that layer useful interfaces onto the refrigerator, range, cabinets, countertops and sink. The interface design is driven by human factors, especially attention theory and user evaluations. By projecting interfaces where they require the least cognitive load, we hope to improve the performance and …