The following categories exist on the wiki, and may or may not be unused. Also see wanted categories.
- NMCGraphiteCell (0 members)
- NewtonMetre (0 members)
- RoentgeniumSymbol (0 members)
- ExposureRate (0 members)
- IntentionalAgent (0 members)
- TotalCurrentDensity (0 members)
- TelluriumAtom (0 members)
- NobeliumSymbol (0 members)
- Diameter (0 members)
- PolarizableElectrode (0 members)
- Activity (0 members)
- StandardModelParticle (0 members)
- RailVehicle (0 members)
- CondensedMatterPhysicsQuantity (0 members)
- LossAngle (0 members)
- Lithium (0 members)
- LinearEnergyTransfer (0 members)
- ConventionalBatteryProperty (0 members)
- FractionUnit (0 members)
- LithiumElectrode (0 members)
- AntimonyAtom (0 members)
- BatteryPack (0 members)
- InternalConversionFactor (0 members)
- LossFactor (0 members)
- WorkingPotentialRange (0 members)
- MassieuFunction (0 members)
- FranciumSymbol (0 members)
- IonicLiquidElectrolyte (0 members)
- Tortuosity (0 members)
- SolidGasSuspension (0 members)
- PromethiumSymbol (0 members)
- TransportProcess (0 members)
- OrdinalQuantity (0 members)
- HydrogenElectrode (0 members)
- HalfPeakPotential (0 members)
- Assembly (0 members)
- ElectrochemicalControlQuantity (0 members)
- Winding (0 members)
- ElectroChemistryRole (0 members)
- CatalyticCurrent (0 members)
- MagneticFieldTreatment (0 members)
- Visual (0 members)
- CausalObject (0 members)
- DisplacementVector (0 members)
- PrefixedUnit (0 members)
- NuclearQuadrupoleMoment (0 members)
- PoliticalLocation (0 members)
- CouplingFactor (0 members)
- FunctionalIcon (0 members)
- Graphical (0 members)