The following categories exist on the wiki, and may or may not be unused. Also see wanted categories.
- Entropy (1 member)
- HelmholtzModel (0 members)
- IsothermalCompressibility (0 members)
- Winding: Final weight of roll (0 members)
- GigaJoule (0 members)
- Zinc (0 members)
- Measurer (2 members)
- SolidFoam (0 members)
- InternalResistance (1 member)
- DirectCurrentInternalResistance (0 members)
- R2012 (0 members)
- Sulfur (0 members)
- Encoder systems (rotary encoder/linear encoder) (0 members)
- MagnesiumIonBattery (0 members)
- PhysicalLaw (3 members)
- StandardizedPhysicalQuantity (1 member)
- TitaniumBasedElectrode (5 members)
- FermiumSymbol (0 members)
- OpenCircuitVoltage (3 members)
- ElectrodeElectrolyteInterface (0 members)
- FieldEmissionScanningElectronMicroscopy (0 members)
- TechnetiumAtom (0 members)
- Cycle Life Testing (0 members)
- InititalThermodynamicTemperature (0 members)
- Tin (0 members)
- Layer thickness calendered electrode (0 members)
- KiloJoule (0 members)
- DeviceLumpedSpecificHeatCapacity (0 members)
- R2025 (0 members)
- Overcharge behavior (0 members)
- D75ParticleSize (0 members)
- MetalAirBattery (8 members)
- Pre-sealing pressure (0 members)
- Ultrasonic sensors (0 members)
- MassPerQuarticLengthTimeUnit (1 member)
- HoleDensity (0 members)
- PressureFractionUnit (0 members)
- KelvinPerSquareSecond (0 members)
- KelvinPerMetre (0 members)
- HexanoicAcid (0 members)
- SiliconBattery (1 member)
- LeadIVOxide (0 members)
- MetricSubMultipleUnit (5 members)
- PositiveElectrodeEntropicChangeCoefficient (0 members)
- DischargingSpecificEnergy (0 members)
- D45ParticleSize (0 members)
- PlantePlate (0 members)
- Educational Organization (30 members)
- NumberOfCellsConnectedInSeries (0 members)
- CalciumBisoxalatoborate (0 members)