A vehicle position indicator includes one or more members defining at least two indicating zones disposed in the user’s field of view for citing an external reference to facilitate the determining the position of the vehicle relative to the external reference. The present invention further provides for a process for filling a syringe with a small quantity of a thoroughly mixed medical gas mixture comprising at least a first gas and a second gas. At least one carbon nanotube film is fabricated. In another aspect, a robot system includes a network data bridge and a mobile robot.