Here is a list of all namespaces with brief descriptions:

[detail level 12345]

ZCounting_cff
ZCountingTrigger
ZDCDigiStudy_cfi
ZdcGeometry_cfi
zdcGeometry_cfi
ZdcGeometryDBReader_cfi
ZdcGeometryDBWriter_cfi
zdcGeometryXML_cfi
ZdcSimHitStudy_cfi
ZdcSimpleRecAlgoImpl
ZDCTask
ZdcUnpacker_impl
ZEE_13TeV_TuneCUETP8M1_cfi
ZEE_14TeV_TuneCP5_cfi
ZEE_14TeV_TuneCUETP8M1_cfi
ZEE_8TeV_TuneCUETP8M1_cfi
ZEE_cfi
zeeCalibration_cff
zeeHLT_cff
zeeHLTInfo_EventContent_cff
zeeMCFilter_cfi
zeeMCInfo_EventContent_cff
ZEEMM_13TeV_TuneCUETP8M1_cfi
ZElectronSkim_cff
ZEleEleAnalyzer
ZeroBiasPDSkim_cfg
ZeroBiasSelector_cfi
ZgammaFilter_cfi
ZHbbSkim_cff
ZJetsTreeAnalyzer
ZMM_13TeV_TuneCUETP8M1_cfi
ZMM_14TeV_TuneCP5_cfi
ZMM_14TeV_TuneCUETP8M1_cfi
ZMM_8TeV_TuneCUETP8M1_cfi
ZMM_cfi
ZmmgSkim_cff
ZMuMuAnalyzer
zmumugammaAnalyzer_cfi
ZmumuJets_Pt_20_300_GEN_13TeV_TuneCUETP8M1_cfg
ZmumuJets_Pt_20_300_GEN_cfg
ZMuMuRochCorAnalyzer
zMuMuValidation
zMuMuValidationTemplates
ZMuSkim_cff
ZpEE_2250_13TeV_Tauola_TuneCUETP8M1_cfi
ZpEE_2250_13TeV_TuneCUETP8M1_cfi
ZpEE_2250_8TeV_TuneCUETP8M1_cfi
ZpMM_13TeV_TuneCUETP8M1_cfi
ZpMM_2250_13TeV_Tauola_TuneCUETP8M1_cfi
ZpMM_2250_13TeV_TuneCUETP8M1_cfi
ZpMM_2250_8TeV_TuneCUETP8M1_cfi
ZpMM_8TeV_TuneCUETP8M1_cfi
ZPrime5000JJ_8TeV_TuneCUETP8M1_cfi
ZPrime5000JJ_cfi
ZprimeToll_M3000_13TeV_pythia8_cff
ZpToEE_m6000_TuneCP5_14TeV_pythia8_cfi
ZpToMM_m6000_TuneCP5_14TeV_pythia8_cfi
ZpTT_1500_13TeV_Tauola_TuneCUETP8M1_cfi
ZpTT_1500_13TeV_TuneCUETP8M1_cfi
ZpTT_1500_14TeV_TuneCP5_cfi
ZpTT_1500_8TeV_TuneCUETP8M1_cfi
ZSPJetCorrections332_cff
ztail
Ztautau_cff
ztee
ZTT_All_hadronic_13TeV_TuneCUETP8M1_cfi
ZTT_All_hadronic_14TeV_TuneCP5_cfi
ZTT_All_hadronic_14TeV_TuneCUETP8M1_cfi
ZTT_All_hadronic_8TeV_TuneCUETP8M1_cfi
ZTT_cfi
ZTT_Tauola_All_hadronic_13TeV_TuneCUETP8M1_cfi
ZTT_Tauola_All_hadronic_14TeV_TuneCP5_cfi
ZTT_Tauola_All_hadronic_14TeV_TuneCUETP8M1_cfi
ZTT_Tauola_All_hadronic_cfi
ZTT_Tauola_cfi
ZTT_Tauola_OneLepton_OtherHadrons_13TeV_TuneCUETP8M1_cfi
ZTT_Tauola_OneLepton_OtherHadrons_8TeV_TuneCUETP8M1_cfi
ZTT_Tauola_OneLepton_OtherHadrons_8TeV_TuneCUETP8M1_ExtGen_cfi
ZTT_Tauola_OneLepton_OtherHadrons_cfi