The following categories exist on the wiki, and may or may not be unused. Also see wanted categories.
- FossilMunicipalWasteFuel (0 members)
- Megabasepair (0 members)
- Gram (0 members)
- CandelaPerSquareMeter (0 members)
- ProcessBoundary (0 members)
- PlannedOutage (0 members)
- UnitPerMilliliter (0 members)
- Hybrid (0 members)
- MagneticFluxUnit (3 members)
- Dataset (0 members)
- Prüfkörperinformationen (3 members)
- DefinedTerm (9 members)
- RenewablePowerPlant (6 members)
- Millisiemens (0 members)
- PowerPlant (15 members)
- MoleculeCount (0 members)
- SolarHeatPlant (0 members)
- RenewableElectrolyticHydrogen (1 member)
- IndustrialWasteFuel (2 members)
- Metallbindung (0 members)
- QualityControlFlag (0 members)
- StudyFactsheet (1 member)
- DynamicRangeUnit (0 members)
- Newton (0 members)
- DigitalMaterialIdentifier (0 members)
- CopyrightLicence (2 members)
- LiquidBiofuel (2 members)
- Sponsor (1 member)
- NaturalAmbientThermalEnergy (2 members)
- RadiantIntensityUnit (1 member)
- Award (0 members)
- TransportSector (1 member)
- BiofuelPowerUnit (2 members)
- RenewableEnergyTransformationFunction (0 members)
- GreenhouseEffectDisposition (0 members)
- GeothermalPowerUnit (0 members)
- Peta (0 members)
- EnergyConversionPerformance (0 members)
- Road (0 members)
- Traction (0 members)
- ClassificationDocument (0 members)
- ScenarioStudy (0 members)
- SecondaryEnergyCarrier (8 members)
- Mile (0 members)
- DeclaredNetCapacity (1 member)
- GaseousRenewableFuel (0 members)
- StartUpSpeed (0 members)
- SlopeOfTheElasticPart (0 members)
- League (0 members)
- MicrogramPerMilliliter (0 members)