The following categories exist on the wiki, and may or may not be unused. Also see wanted categories.
- AmericiumSymbol (0 members)
- MeasuringDevice (0 members)
- AntiMatter (0 members)
- SpecificEntropy (0 members)
- GalvanicCellCharging (0 members)
- NumberOfElements (0 members)
- MaterialLaw (0 members)
- Volume (0 members)
- ElectrolyteContinuumModel (0 members)
- PhosphateOreDeposit (0 members)
- SpecificGasConstant (0 members)
- BilayerMembrane (0 members)
- LawrenciumSymbol (0 members)
- Siemens (0 members)
- ActiveMaterial (0 members)
- Assigner (0 members)
- SIExactConstant (0 members)
- LivermoriumAtom (0 members)
- MeasuringInstrument (0 members)
- PricePerVolume (0 members)
- InternationalSystemOfQuantity (0 members)
- Angle (0 members)
- ProcessParameter (0 members)
- ElectrodeRole (0 members)
- DipCoating (0 members)
- ElectrochemicalMethod (0 members)
- CathodicReaction (0 members)
- AngularFrequency (0 members)
- DegreeOfDissociation (0 members)
- Milligram (0 members)
- ReactionOverpotential (0 members)
- ZincAtom (0 members)
- SquareTimePerMassDimension (0 members)
- ElectrodePotential (0 members)
- NMC622 (0 members)
- Crushing (0 members)
- ElectricFieldStrength (0 members)
- HybridFlowCell (0 members)
- Yocto (0 members)
- R2016 (0 members)
- LithiumThionylChlorideBattery (0 members)
- EnergyDimension (0 members)
- ActiveMaterialParticleCracking (0 members)
- Quantity (0 members)
- MolarEnergy (0 members)
- ConstitutiveProcess (0 members)
- ElectricCurrentMeasuringSystem (0 members)
- MathematicalOperator (0 members)
- IndicatorElectrode (0 members)
- Filtering (0 members)