In this presentation applications are discussed that describe achievements along the road towards 'Ambient Intelligence'. Appliances and devices disappear into the environment of the individual; instead services come into focus. Key to this development are systems solutions that lead to a significant improvement of the human-machine interface. Along this line, we present important technologies and key system components. They range from technologies for packaging and gathering of ambient energy, to system demonstrators such as low-cost electronic systems, ubiquitous sensor networks and electronics in smart textiles. The prime importance of the supply with electric power and of low-power consumption especially in the peripheral devices are emphasized.