The following categories exist on the wiki, and may or may not be unused. Also see wanted categories.
- StandaloneAtom (0 members)
- SoftwareRepository (0 members)
- Shape3Vector (0 members)
- Second (0 members)
- PhysicalPhenomenon (0 members)
- Sol (0 members)
- NewtonianConstantOfGravityDimension (0 members)
- Smelting (0 members)
- IonNumberDensity (0 members)
- Energy (0 members)
- LivermoriumSymbol (0 members)
- SIUnitSymbol (0 members)
- MeitneriumAtom (0 members)
- ElectricConductanceDimension (0 members)
- DimensionOne (0 members)
- ScalarMeson (0 members)
- SquareWaveCurrent (0 members)
- MassSpectrometer (0 members)
- Radius (0 members)
- FabricatedIntercalationElectrode (0 members)
- Separator (0 members)
- AreaDimension (0 members)
- Molecule (0 members)
- Katal (0 members)
- ThermalResistivityDimension (0 members)
- ReplacementBattery (0 members)
- SolidLiquidSuspension (0 members)
- StandardAbsoluteActivity (0 members)
- ActivityCoefficient (0 members)
- DataObject (0 members)
- LithiumInsertionElectrode (0 members)
- SourceCode (0 members)
- BetaDisintegrationEnergy (0 members)
- MassAreaDimension (0 members)
- R2032 (0 members)
- NCM811Electrode (0 members)
- PraseodymiumSymbol (0 members)
- NCAElectrode (0 members)
- ErbiumSymbol (0 members)
- ElectricResistivityDimension (0 members)
- Cathode (0 members)
- Conventional (0 members)
- Description (0 members)
- SolidAngularMeasure (0 members)
- ThermalUtilizationFactor (0 members)
- PorousElectrode (0 members)
- FluorineSymbol (0 members)
- Deducer (0 members)
- C (0 members)
- SilverAtom (0 members)