Helmet-Mounted Miniature Information Display (HEMIND) is an IST EU project whose main purpose is to design, prototype and manufacture a helmet-mounted display system for firefighters. The display has been made of a high resolution, miniature, see-through, monochrome display. An autonomous, portable, computer system present images overlapped with the normal viewing field of the user. The images can be video images (thermal images, standard images) as well as data from sensors integrated in the clothes of the user or received through a radio-communication system.