The following categories exist on the wiki, and may or may not be unused. Also see wanted categories.
- WasteThermalEnergy (1 member)
- IonicBond (0 members)
- Wind (0 members)
- VanDerWaalsBindung (0 members)
- MechanicalTestingProcess (3 members)
- SolarChemicalEnergyTransformation (0 members)
- PrivateTransport (0 members)
- TheoreticalFlowPotential (0 members)
- RadioactivityConcentration (2 members)
- Dehngrenze (2 members)
- ArealEnergyDensity (1 member)
- ModelCalculation (2 members)
- ProcessIdentifier (0 members)
- SpatialResolution (0 members)
- ScenarioFactsheet (0 members)
- NuclearEnergyTransformation (0 members)
- SensibleFluidHeatStorageObject (0 members)
- Power (0 members)
- HeatGenerationProcess (6 members)
- OneDimensionalTemporalRegion (2 members)
- EnergyTransferFunction (0 members)
- Cement (0 members)
- GeometryChangingProcess (1 member)
- PublicFunder (0 members)
- EuAllowance (0 members)
- Pm25 (0 members)
- OSWf016780476d14dc5b9741e6578b970fd (1 member)
- RotaryHeatExchanger (0 members)
- RenewableEnergyCarrierDisposition (0 members)
- DevelopableStockPotential (0 members)
- MarketExchange (2 members)
- Temperature (1 member)
- PlannedAvailability (0 members)
- OutputData (0 members)
- PowerToMethaneProcess (0 members)
- Device (1 member)
- NanogramPerMilliliter (0 members)
- RelativeLuminescenceUnit (0 members)
- BrentCrude (0 members)
- CoalPowerPlant (2 members)
- HydroPowerUnit (3 members)
- TonKilometre (0 members)
- ProjectIdentifier (0 members)
- Grain (0 members)
- SolidAngleUnit (1 member)
- EmissionCertificate (2 members)
- ReasonedOntologyModule (0 members)
- BidirectionalVehicleChargingStation (0 members)
- KatalPerCubicMeter (0 members)
- Voltage (0 members)