There are methods for both passive and active motion stabilization used in some designs. The filtration may be either passive or active (powered). They are related to active and passive participles. Another classification is passive and active Euthanasia. The distinction between active and passive transformations is important. Use of both passive and active sonar has been proposed for various extraterrestrial uses. The Stick is available with passive or active pickup modules. Styluses come in both passive and active versions. There are two methods of traffic-analysis attack, passive and active. This water flows over the gills by a variety of active or passive means. Satellite imagery is an example of passive remote sensing. Serbian has active and passive voice. Graham distinguished between the passive and the active investor. Within the city are of land reserved for passive and active park usage. The constitution went back to the distinction between active and passive citizens.