Stephen Hawking

Since he is severely disabled, thoeretical physicist Stephen Hawking uses a voice synthesiser to communicate. Also, the computer system attached to his wheel-chair is operated by him via an infra-red 'blink switch' clipped onto his glasses. By scrunching his right cheek up, he is able to talk, research papers, browse the Internet and write e-mail. The system also uses radio transmission to provide control over doors in his home and office.