- u -

• UNINITIALIZED : com.google.appinventor.components.common.ComponentCategory
• UNKNOWN : com.google.appinventor.components.runtime.util.MapFactory.MapScaleUnits , com.google.appinventor.components.runtime.util.MapFactory.MapType
• UNKNOWN_VALUE : com.google.appinventor.components.runtime.LocationSensor
• UNSET : com.google.appinventor.components.annotations.PropertyCategory
• userHeading : com.google.appinventor.components.runtime.Sprite
• USERINTERFACE : com.google.appinventor.components.common.ComponentCategory