More than 500 workers at Japan's, Keihin Electric Express Railway, must have their faces scanned each morning to determine their optimum smile. The "smile scan" analyzes a smile based on facial characteristics, from lip curves and eye movements to wrinkles. After the program scans you, it produces a smile rating that ranges from zero to 100 depending on the estimated potential of your biggest smile. If your number is sufficient, you can go about your day grinning like a maniac. If your smile number is too low the computer will give you a message such as, "lift up your mouth corners" or "you still look too serious." Every morning employees receive a printout of their daily smile which they are expected to keep with them throughout the day.