The following categories exist on the wiki, and may or may not be unused. Also see wanted categories.
- Identifier (8 members)
- TwoDimensionalSpatialRegion (2 members)
- EcoinventElementaryExchange (1 member)
- RoentgenEquivalentMan (0 members)
- SewagePlant (0 members)
- FuelCost (0 members)
- ThermalEnergy (6 members)
- SteamReformingHydrogen (2 members)
- TemperatueMeasuringDevice (1 member)
- DistrictHeating (0 members)
- CubicCentimeter (0 members)
- BlastFurnaceGas (0 members)
- MilligramPerMilliliter (0 members)
- Object (9 members)
- OSWb7d670170a375eff81f3d1b315afa512 (1 member)
- GridNode (0 members)
- VolumePercentage (0 members)
- Arbeitsbereich (0 members)
- Group (0 members)
- Medium (0 members)
- SurfaceTensionUnit (2 members)
- OSWb987bf55c6e75a608c9ff74fbfa2aac0 (1 member)
- ArealSolarEnergyDensity (0 members)
- Rechteckig (0 members)
- CountPerNanomolar (0 members)
- Nanovolt (0 members)
- BigMapNotebookEntry (2 members)
- Optical (0 members)
- TangentialProperPart (1 member)
- Levy (1 member)
- HydrogenStation (0 members)
- Herstellungsprozess (0 members)
- SustainableStockPotential (0 members)
- Microscope (1 member)
- ManufacturedCoalBasedGas (3 members)
- CarbonStorage (0 members)
- Railway (0 members)
- PhaseTransition (2 members)
- Entity (2 members)
- TechnologicalStockPotential (0 members)
- NcBrSectorDivision (0 members)
- IrradianceUnit (3 members)
- RenewableEnergyShareValue (0 members)
- VehicleChargingStation (1 member)
- Bid (0 members)
- GlobalWarmingPotential (0 members)
- Role (6 members)
- NonSustainableBiofuel (0 members)
- FuelCell (1 member)
- Volt (0 members)