The following categories exist on the wiki, and may or may not be unused. Also see wanted categories.
- TitaniumDioxide (0 members)
- R936 (0 members)
- LiquidFoam (0 members)
- Pressure/compression requirements (lab scale) (0 members)
- CalciumChloride (0 members)
- Formation (0 members)
- ClarkCell (0 members)
- CopperIIBromide (0 members)
- FiberboardManufacturing (0 members)
- Foundation (0 members)
- LinearMassDensity (0 members)
- SodiumTriflate (0 members)
- GlycidicAcid (0 members)
- Neon (0 members)
- FormingFromLiquid (5 members)
- InChI (0 members)
- RadialDistance (1 member)
- Icon (6 members)
- DegreeCelsiusCentiMetre (0 members)
- StepIndex (0 members)
- MegaNewtonMetre (0 members)
- Sphere (0 members)
- Peta (0 members)
- PotassiumAtom (0 members)
- LengthC1 (0 members)
- FineStructureConstant (0 members)
- SurfaceC2B4 (0 members)
- SiemensSquareMetrePerMole (0 members)
- ThermalResistance (0 members)
- MalonicAcid (0 members)
- ActivationEnergy (6 members)
- ReactivePower (0 members)
- Henry (0 members)
- CubicMetrePerKilogram (0 members)
- Force Sensing Resistors (FSRs) (0 members)
- MetaDeviceCategory (0 members)
- External pressure (testing) (0 members)
- CanonicalPartitionFunction (0 members)
- Connector (0 members)
- PlatinumBasedElectrode (1 member)
- ConventionalProperty (0 members)
- MaintanenceFreeBattery (0 members)
- CoulombMetre (0 members)
- Image Analysis (0 members)
- Language (4 members)
- MegaCoulombPerSquareMetre (0 members)
- TitaniumBasedElectrode (0 members)
- ElectrodePair (0 members)
- UserCase (0 members)
- EquilibriumElectrodePotential (2 members)