Here is a list of all namespaces with brief descriptions:

[detail level 12345]

UEAnalysisJets_cfi
UEAnalysisParticles_cfi
UEAnalysisRootple_cfi
UEAnalysisRootpleOnlyMC_cfi
UEAnalysisTracks_cfi
uncleanedOnlyElectronSequence_cff
uncleanSCRecovery_cfi
UndergroundCosmicMu_cfi
unifiedSCCollection_cfi
uniformMagneticField_cfi
UnixSignalService_cfi
unpackedTracksAndVertices_cfi
unpacker2007h4_cff
updateADCToGeV
updateHPSPFTaus_cff
updateIntercali
UpgradeGeometries_cff
upgradeTracking_longbarrel_cff
upgradeTracking_phase1_cff
upgradeTracking_stdgeom_cff
upload_popcon
uploader
uploadPayloads
UpsEE_7TeV_cfi
UpsEE_8TeV_cfi
UpsEE_cfi
upsilon1sMuMuTrigSettings_cff
Upsilon1SToMuMu_forSTEAM_13TeV_cfi
upsilonToMuMu_EventContent_cff
upsilonToMuMu_HLTPath_cfi
upsilonToMuMu_SkimPath_cff
upsilonToMuMuOutputModuleAODSIM_cfi
UpsMM_7TeV_cfi
UpsMM_8TeV_cfi
UpsMM_cfi
UpsMM_EXTRAS_cff
UpsMM_filt_cfi
usedOutput
useReflexToDescribeForGenObject
UserOptions_cff
useSource_custom
UseZeroBField_cff
UTarget_cfi
Utilities
ReleaseScripts
commentSkipper
commentSkipper
filter
utils
Utils
utils_v2