A communication terminal apparatus capable of registering sender’s e-mail addresses upon receiving e-mails including the e-mail address registration instruction information in the subject. By actively radiating a semi-transparent target anomaly with multiple millimeter wave radiation frequencies, the dielectric properties of the target anomaly can be identified. The thin films can serve as compensation layers in liquid crystal displays, and can be combined with other types of optical films, such as polarizers, brightness enhancement films, or other compensation films, to from multi-layered films that are especially useful in the manufacture of LCDs.