A ferrule has at least one row of optical fiber openings to hold optical fibers. One example graphical interface includes at least two screen regions displayed in relation to each other, with each region including a plurality of locations. The image forming apparatus has an authentication data reading device which receives supply of power from a power supply path that is different from a power supply path to the body unit, reads authentication data from an authentication medium, and holds the read data. In another aspect, the present invention provides a fluoropolymer derived from the fluoropolymer latex made according to the method of the present invention which is free of added emulsifier. The statistical variables are utilized as a basis for comparing the collection of pixels to a different collection of pixels.