The following categories exist on the wiki, and may or may not be unused. Also see wanted categories.
- LiquidSol (0 members)
- ElementalSubstance (76 members)
- Momentum (0 members)
- DubniumSymbol (0 members)
- MilliGramPerCubicMetrePerSecond (0 members)
- FundamentalPhysicalSystem (3 members)
- PetaPrefixedUnit (2 members)
- Chlorine (0 members)
- CoefficientOfHeatTransfer (1 member)
- PrismaticCase (24 members)
- OSW43d0bb2cbb0e4312a0de084c29ff7f9e (3 members)
- FrequencyPerVolumeUnit (2 members)
- Process (13 members)
- MagnesiumBisfluorosulfonylimide (0 members)
- Synchrotron (0 members)
- DifferentialThermalAnalysis (0 members)
- PositiveElectrodeElectronicConductivity (0 members)
- WeberPerMilliMetre (0 members)
- MetreKilogram (0 members)
- Helium Pycnometry (0 members)
- MetricPrefix (1 member)
- ShortData (2 members)
- SelfDischarging (0 members)
- ParticleEmissionRate (0 members)
- ContinuumModel (1 member)
- StaticFrictionForce (0 members)
- TerminationQuantity (0 members)
- TinIIOxide (0 members)
- AverageLogarithmicEnergyDecrement (0 members)
- AluminiumAirBattery (0 members)
- LengthTimeTemperatureUnit (1 member)
- Person (3 members)
- CeriumSymbol (0 members)
- Milling (0 members)
- ElectronMass (0 members)
- MagnesiumChlorate (0 members)
- MetrePerFarad (0 members)
- PlateGroup (0 members)
- DischargingConstantCurrentPercentage (0 members)
- LithiumIonManganeseOxideBattery (0 members)
- NeutralAtom (0 members)
- PicoMolePerCubicMetre (0 members)
- Mass loading negative/positive electrode (0 members)
- Holder (0 members)
- FromNotProperShapeToWorkPiece (10 members)
- VoltSecondPerMetre (0 members)
- StoredEnergy (4 members)
- DeviceTemperature (0 members)
- Degassing (0 members)
- Measurement (6 members)