Here are the classes, structs, unions and interfaces with brief descriptions:

[detail level 1234]

▼NActs
CInterpolatedBFieldMap
CInterpolatedBFieldMapper
CMaterialWiper
▼Nboost
▼Ndd4hep
▼NFW
▼NFWCore
▼NGaudi
CProperty<::DataHandle< T > & >
▼NJug
►NBase
CInputCopier
CParticleData
►NBField
►CDD4hepBField
CCache
►CScalableBField	Returns a given constant field value at every point
CCache
CScalableBFieldContext	The Context to be handed around
►Ndetail
CCompareGeometryId
CGeometryIdGetter
►NDigi
CCalorimeterBirksCorr
CCalorimeterHitDigi
CPhotoMultiplierDigi
CSiliconTrackerDigi
CSimTrackerHitsCollector
►NPlotHelpers
CBinning	Nested binning struct for booking plots
►NReco
CCalorimeterHitReco
CCalorimeterHitsEtaPhiProjector
CCalorimeterHitsMerger
CCalorimeterIslandCluster
►CCKFTracking
CCKFTrackingFunction
CClusterRecoCoG
CConformalXYPeakProtoTracks
CEnergyPositionClusterMerger
CFarForwardParticles
CFarForwardParticlesOMD
CFinderAlgoTemplate
►CGenFitTrackFitter
CFieldImp
CHoughTransformProtoTracks
CImagingClusterReco
CImagingPixelDataCombiner
CImagingPixelDataSorter
CImagingPixelMerger
CImagingPixelReco
CImagingTopoCluster
CInclusiveKinematicsDA
CInclusiveKinematicsElectron
CInclusiveKinematicseSigma
CInclusiveKinematicsJB
CInclusiveKinematicsSigma
CParticleCollector
CParticlesFromTrackFit
CPhotoMultiplierReco
CProtoTrackMatching
CSimpleClustering
CSingleTrackSourceLinker
CTrackerHitReconstruction
CTrackerSourceLinker
►CTrackFindingAlgorithm
CTrackFinderFunction
CTrackFittingAlgorithm
CTrackingHitsCollector
CTrackingHitsCollector2
CTrackingHitsSourceLinker
CTrackParamClusterInit
CTrackParamImagingClusterInit
CTrackParamTruthInit
CTrackParamVertexClusterInit
CTrajectoryFromTrackFit
CTruthTrackSeeding
►NTrack
CActsTrajectoryReader
CGeometryIdMultisetAccessor
►CGroupBy
CGroupIterator	Iterator type representing a group of elements
CIndexSourceLink
CMeasurementCalibrator	Calibrator to convert an index source link to a measurement
CParticleHitCount	Associate a particle to its hit count within a proto track
CRange
CSimMultiTrajectory	Struct for truth track fitting/finding result with Acts::KalmanFitter/Acts::CombinatorialKalmanFilter
CSourceLink
CTrajectories
▼Npodio
CDataHandle
CDataWrapper
CDataWrapperBase
CEICDataSvc
CGaudiFilterPolicy
CGaudiPrintPolicy
CGeoSvc
CIGeoSvc
CIParticleSvc
CKeepDropSwitch
Cpair_hash
CPairHashFunction
CParticleSvc
CPodioDataSvc
CPodioEvtSvc
CPodioInput
CPodioOutput
CReadTestConsumer
CTestACTSLogger