The following categories exist on the wiki, and may or may not be unused. Also see wanted categories.
- GaugeLength (3 members)
- SolarThermalPowerPlant (0 members)
- LignitePowerPlant (0 members)
- CountPerMolar (0 members)
- MunicipalWasteFuel (2 members)
- ElectricityExportValue (0 members)
- CheckingAgainstEmpiricalData (0 members)
- PhotovoltaicEnergyTransformation (1 member)
- DehngrenzeBeiPlastischerExtensometerDehnungRp02 (0 members)
- CombinedCycleElectricityGenerationProcess (0 members)
- Analyseprozess (5 members)
- Millivolt (0 members)
- River (0 members)
- MilligramPerLiter (0 members)
- UgDisk (0 members)
- DispatchAssignment (0 members)
- IntangibleItem (4 members)
- Lichtmikroskopie (0 members)
- ElectricityDemand (0 members)
- AbsorbedDoseUnit (5 members)
- DataSet (5 members)
- OneDimensionalSpatialRegion (0 members)
- BatteryElectricVehicle (4 members)
- Doi (0 members)
- AssociatedGas (0 members)
- AgingTime (1 member)
- MarineCurrentEnergyTransformation (0 members)
- GigawattHour (0 members)
- Test (0 members)
- GrossInlandEnergyConsumption (0 members)
- Furnace (0 members)
- ElectronMicroscope (1 member)
- Nanogram (0 members)
- Herstellungsknoten (0 members)
- MeterPerSecondPerSecond (0 members)
- NmoleDisk (0 members)
- RelativeLightUnit (2 members)
- Bild (0 members)
- InformationContentEntity (28 members)
- Sievert (0 members)
- SustainableProcess (0 members)
- BiogasPowerUnit (0 members)
- FuelCellElectricVehicle (2 members)
- NonGovernmentalOrganization (2 members)
- Enumeration (6 members)
- Volume (0 members)
- AmbientThermalEnergyTransfer (0 members)
- Demontageprozess (0 members)
- Measurement (0 members)
- Motorcycle (0 members)