The following categories exist on the wiki, and may or may not be unused. Also see wanted categories.
- CubicCentiMetrePerCubicMetre (0 members)
- FaradPerMetre (0 members)
- NewtonSecondPerRadian (0 members)
- Additive (2 members)
- Ultrasonic flow meters (0 members)
- R521 (0 members)
- JoulePerTesla (0 members)
- CarbonBlack (0 members)
- SquareCentiMetrePerSecond (0 members)
- SodiumBisoxalatophosphate (0 members)
- Scratch test (0 members)
- ElectronBackscatterDiffraction (0 members)
- Probability (2 members)
- AtomicScatteringFactor (0 members)
- HPPC (0 members)
- IndiumIIITriflate (0 members)
- MoleFraction (0 members)
- ZeroManifold (1 member)
- RollingResistance (0 members)
- MilliHenryPerKiloOhm (0 members)
- MicroMetrePerKelvin (0 members)
- MolePerCubicMetrePerSecond (0 members)
- ElectrochemicalDevice (10 members)
- Duration (12 members)
- AmorphousMaterial (0 members)
- PotassiumBasedElectrode (0 members)
- ResonanceEscapeProbability (0 members)
- Dispersion (0 members)
- Thermocouple/Thermistor (contacting) (0 members)
- SurfaceCoefficientOfHeatTransfer (0 members)
- Roll/Stack (in casing) (0 members)
- Inequality (0 members)
- SquareMetrePerGram (0 members)
- SurfaceC3B2 (0 members)
- ArsenicSymbol (0 members)
- Crystal (0 members)
- ZincSymbol (0 members)
- SodiumCobaltPhosphate (0 members)
- StepSignalVoltage (0 members)
- R736 (0 members)
- NickelZincBattery (0 members)
- Solvent loading drying air (0 members)
- OneManifold (2 members)
- SupplyChain (0 members)
- ValveRegulatedLeadAcidBattery (0 members)
- GasDissolution (0 members)
- InternalConductance (0 members)
- LR20 (0 members)
- MolarAttenuationCoefficient (0 members)
- OppositeTerminalPouchWithoutSealingSeam (0 members)