This volume examines the human-centred approach to designing systems and technologies, which emphasises the symbiosis of human capability and machine capacity. Its main ideas have become integral to many design methodologies, including social ergonomics and cognitive technology. Human Machine Symbiosis offers a unique coverage of the topic: it brings together various strands of human-centred systems philosophy, and gives a comprehensive overview of relevant traditions, approaches, methodologies, and practices. It provides theoretical and methodological underpinnings for the design and application of technologies and systems, along with frameworks and models for designing information, communication and multimedia technologies. It contains contributions from a variety of leading researchers in the field, including some of the pioneers of the European human-centred tradition.