The photo has the following information: Lens: The lens focuses light from the scene onto the CCD. CCD (charged-coupled device): The CCD has millions of light-sensitive cells, called photosites. The more photosites per unit area, the sharper the image is. Analog-to-digital converter: The analog-to-digital converter turns the output of each photosite into digital code. Microprocessor: The microprocessor calculates color values for each part of the image. Memory chip: Data about the image are stored on this non-removable chip. Memory card: This removable card stores the image as a digital file. Computer output port: This port allows the digital image to be transferred to a computer. LCD (liquid crystal display) screen: The LCD screen displays an image of the scene that the camera is aimed at. Images that have been previously saved can also be displayed on the screen. Digital-to-analog converter: Here the digital data are turned into a form that allows the image to be displayed on the LCD screen.