Tree for policy-settings-basic in MeeGo Multimedia - MeeGo. Since it is often claimed that Prolog is such an esoteric language that no one would use in normal life: the part of MeeGo (we remember, this is the handset operating system from the Nokia N900/N950/N9) that triggers various settings depending on environmental conditions is written in Prolog. And it runs productively on the handsets.