The following categories exist on the wiki, and may or may not be unused. Also see wanted categories.
- Höchstkraft (0 members)
- PowerPlantOperator (0 members)
- DecommissioningCost (0 members)
- ConventionalEnergy (5 members)
- CreativeWork (2 members)
- TurbidityUnit (1 member)
- LifeTime (1 member)
- BaseUnitOfMeasure (6 members)
- Co2Price (1 member)
- Dalton (0 members)
- GasDieselOil (2 members)
- Helicopter (0 members)
- WattHour (0 members)
- OwlClass (2 members)
- UncertaintyApproach (0 members)
- Project (0 members)
- Milli (0 members)
- FeretDiameter (0 members)
- SpecificSpaceRequirement (0 members)
- Consumer (0 members)
- PrefectFlow (0 members)
- OSW7320196c95834b15974ec1f5c86737cd (1 member)
- DevelopableFlowPotential (0 members)
- Centimeter (0 members)
- Receiver (0 members)
- SingleAxisTrackedReceivingSurface (0 members)
- EndogenousData (1 member)
- StudyRegion (0 members)
- WindFarm (2 members)
- BatteryPassportCatenaXV600 (3 members)
- Boiler (0 members)
- VariableProductionCost (0 members)
- TechnologicalFlowPotential (0 members)
- HydroelectricEnergyTransformation (3 members)
- ZeroDimensionalTemporalRegion (4 members)
- Geogenic (1 member)
- SquareMicrometer (0 members)
- PowerToLiquidProcess (0 members)
- Acoustical (0 members)
- DataAcquisitionRate (0 members)
- ElectricalEnergyShareValue (0 members)
- Location (0 members)
- ConfluencePercentage (0 members)
- AreaUnit (10 members)
- PumpedHydroEnergy (0 members)
- DirectiveInformationEntity (1 member)
- PowerPlantWithElectroMotiveGenerator (9 members)
- Femtoliter (0 members)
- MicrogramPerLiter (0 members)
- ParticleNumber (0 members)