Here is a list of all typedefs with links to the classes they belong to:

### - o -

- object_type : osgWidget::UIObjectParent< T >
- ObjectCacheMap : osgDB::ObjectCache
- ObjectCallbackType : osgWidget::ObjectCallback< T >
- ObjectIndex : osgDB::ExternalFileWriter
- ObjectList : osg::DefaultUserDataContainer, osgDB::DatabasePager
- ObjectMap : osgDB::OutputStream
- ObjectPropertyMap : osgDB::ClassInterface
- Objects : osg::DisplaySettings
- ObjectsSet : osgDB::ExternalFileWriter
- ObjectsToDeleteList : osg::DeleteHandler
- ObjectTimeStampPair : osgDB::ObjectCache
- Observers : osg::ObserverSet
- ObsNodePath : osg::ObserverNodePath
- OccluderList : osg::CullingSet, osg::CullStack
- Operations : osg::OperationQueue
- OperationThreads : osg::OperationQueue, osgViewer::ViewerBase
- OperatorList : osgPresentation::ActiveOperators
- Options : osgDB::ReaderWriter
- other_value_type : osg::Matrixd, osg::Matrixf
- OverlayDataMap : osgSim::OverlayNode
- OverrideValue : osg::StateAttribute