- u -

• UNASSIGNED : ParticleFlowElement
• unbroken : G4VisAttributes
• Undefined : PriorityList , G4DNASmoluchowskiDiffusion::BoundingBox , CCalVisualisable
• undefined : G4KineticTrack
• Uniform : PHG4ParticleGeneratorVectorMeson , PHG4SimpleEventGenerator , PHHepMCGenHelper
• UNION : HepPolyhedronProcessor , G4GDMLReadSolids
• UnitCategory : G4GenericMessenger::Command
• UnitDefault : G4GenericMessenger::Command
• unknown : HcalRawTowerBuilder
• Unknown : ReadEICFiles
• UNKNOWN : G4ParticleTypeConverter , Item
• UNLIMITED : G4Scene , G4PhysicalVolumeModel
• UNMATCHED_CHARGED_HADRON : ParticleFlowElement
• UNMATCHED_EM_PARTICLE : ParticleFlowElement
• UNMATCHED_NEUTRAL_HADRON : ParticleFlowElement
• user : Acts::ConstrainedStep