The following categories exist on the wiki, and may or may not be unused. Also see wanted categories.
- ElectrochemicalMaterial (2 members)
- KilogramSquareMetrePerSecond (0 members)
- R916 (0 members)
- ElectricFieldStrengthUnit (8 members)
- DegreeCelsiusPerKelvin (0 members)
- LightAndRadiationQuantity (1 member)
- VentedCell (0 members)
- X-ray Photoelectron Spectroscopy (XPS) (0 members)
- Mixture (3 members)
- Steradian (0 members)
- Edge quality (lab scale) (0 members)
- LinkedModelsSimulation (0 members)
- CarbonInkElectrode (0 members)
- ManufacturedMaterial (10 members)
- SurfaceMassDensity (0 members)
- ZincTriflate (0 members)
- ScanningTunnelingMicroscopy (0 members)
- MagneticFluxDensityUnit (4 members)
- MomentumUnit (4 members)
- SamplingTime (0 members)
- KilogramPerKilogram (0 members)
- Gluing (0 members)
- ChemicalRepresentation (1 member)
- PotassiumFluoride (0 members)
- TrimethoxyMethylSilane (0 members)
- PerchloricAcid (0 members)
- ReciprocalLength (10 members)
- CobaltIIChlorate (0 members)
- SolidElectrolyteInterphase (1 member)
- Lock-In Amplifier (0 members)
- DeepDrawing (0 members)
- Attenuation (0 members)
- StepChronopotentiometry (0 members)
- ClassicalData (0 members)
- Tantalum (0 members)
- MilliMetre (0 members)
- Cycle life (0 members)
- DecaPascal (0 members)
- PicoLitre (0 members)
- Speed of the rolls (calendering) (0 members)
- Mass (7 members)
- BismuthSymbol (0 members)
- NewtonPerSquareCentiMetre (0 members)
- ElectricCurrentPerTemperatureUnit (1 member)
- PlatinumOxide (0 members)
- Salt (6 members)
- AqueousMetallicFlowBattery (4 members)
- RoleBySpatiotemporal (2 members)
- VinylEthyleneCarbonate (0 members)
- EndTile (1 member)