Three government centers in the UK have been working on a way to use digital technology to help the elderly and the disabled. One of their ideas is a supermarket satellite navigation system to help elderly people who get confused by changing layouts in the aisles. Professor Paul Watson, of Newcastle University, said: "Many older people lack the confidence to maintain 'normal' walking habits. This is often due to worries about getting lost in unfamiliar, new or changing environments." A kitchen for Alzheimer's patients packed with hidden sensors and projectors is also in the works.