- u -

• UNCHOSEN : Mount
• UNFIRED : Mount
• UNIT : LineCollide , CreateFlightgroup
• UNIT_BOLT : Unit
• UNIT_ONLY : Unit
• UNKNOWN : Orders::AggressiveAI , weapon_info , MeshXML , Account
• Unknown : Radar::Track::Type
• UP_ARROW : ScrollerButton
• UPDATE_ALL : Audio::RenderableListener , Audio::RenderableSource
• UPDATE_ATTRIBUTES : Audio::RenderableSource , Audio::RenderableListener
• UPDATE_EFFECTS : Audio::RenderableListener , Audio::RenderableSource
• UPDATE_GAIN : Audio::RenderableSource , Audio::RenderableListener
• UPDATE_LOCATION : Audio::RenderableListener , Audio::RenderableSource
• UpEvent : BaseInterface::Room::Link
• UPGRADE : BaseComputer
• USENORMALS : MeshXML
• USETANGENTS : MeshXML