The following categories exist on the wiki, and may or may not be unused. Also see wanted categories.
- Urea (0 members)
- IridiumDioxide (0 members)
- Component (20 members)
- BatteryPhenomenon (0 members)
- AmountFractionUnit (4 members)
- CubicKiloMetrePerSquareSecond (0 members)
- InterfacialRegion (4 members)
- Vacuum (mixing) (0 members)
- HydrogenFluoride (0 members)
- CopperOxideCompound (2 members)
- Electrochemistry (lab scale) (0 members)
- R1225 (0 members)
- CaesiumSymbol (0 members)
- MathematicalModel (2 members)
- TemporalTiling (3 members)
- Nucleus (0 members)
- ScriptingLanguage (4 members)
- Electrode wettability (0 members)
- Hard case: Laser protocol (pre-sealing) (0 members)
- SilverOxideCadmiumBattery (0 members)
- EnergyFluenceRate (0 members)
- Hyperon (0 members)
- LithiumNitrite (0 members)
- TensorMeson (0 members)
- SilverBasedElectrode (1 member)
- Voltage range (testing) (0 members)
- DifferentialOperator (2 members)
- FormingFromPowder (3 members)
- IntegerData (4 members)
- Titanium (0 members)
- CathodeElectrolyteInterphase (0 members)
- LeadIISulfide (0 members)
- SodiumChromiumOxideElectrode (0 members)
- Mixing order (0 members)
- AmericiumAtom (0 members)
- CoperniciumAtom (0 members)
- JouleSecond (0 members)
- Nickel (0 members)
- Torque sensor (0 members)
- IronBattery (2 members)
- Network (2 members)
- InternalApparentResistance (0 members)
- Modeller (0 members)
- ActivityDensity (0 members)
- GasSampling (0 members)
- RubidiumSymbol (0 members)
- Edge geometry (0 members)
- Palladium (0 members)
- HyperfineTransitionFrequencyOfCs (0 members)
- BecquerelPerKilogram (0 members)