Book excerpt: The 5th International Conference on Intelligent Environments (IE 09), held at the Polytechnic University of Catalonia, Castelldefels, Barcelona, Spain, provides a multidisciplinary forum for researchers and engineers from across the world to present their latest research and to discuss future directions in the area of intelligent environments. This volume forms the combined proceedings of five workshops held at the IE 09. Included are the proceedings of the: Workshop on Digital Object Memories (DOMe 09); Workshop on RFID Technology: Concepts, Practices and Solutions (RFID 09);