The following categories exist on the wiki, and may or may not be unused. Also see wanted categories.
- KilogramSquareMilliMetre (0 members)
- TitaniumIIIOxide (0 members)
- AqueousSolution (1 member)
- NegativeElectrodeCoatingPorosity (0 members)
- Electrocapillarity (0 members)
- ElectricChargeDensity (0 members)
- PhysicalPhenomenon (0 members)
- Niobium (0 members)
- TappedDensity (0 members)
- HardCarbon (0 members)
- ExaPrefixedUnit (2 members)
- ThreeMeSulfolane (0 members)
- Cell type and size (0 members)
- AmountPerMassTimeUnit (2 members)
- NeutronYieldPerFission (0 members)
- EnergyDistributionOfCrossSection (0 members)
- NanoMaterial (0 members)
- EnergyImparted (0 members)
- PerMilliSecond (0 members)
- PhysicsMathematicalComputation (1 member)
- FatigueTesting (0 members)
- MultiParticlePath (0 members)
- IronBasedElectrode (1 member)
- ModulusOfAdmittance (0 members)
- OSW5e38e44ba0d14afca87695095c0a589f (3 members)
- ChargingSpecificEnergy (0 members)
- SodiumNitrite (0 members)
- FormingFromChip (3 members)
- SolidSolution (0 members)
- AlkalineA27 (0 members)
- X-ray Fluorescence (XRF) (0 members)
- ConcentrationLimit (2 members)
- MegaPrefixedUnit (29 members)
- Competence (0 members)
- UnitOne (0 members)
- VoltageLimit (2 members)
- Arcsecond (0 members)
- FermiumAtom (0 members)
- RefractiveIndex (0 members)
- Laser Scanning Profilometry (0 members)
- Person role (2 members)
- ReciprocalDuration (1 member)
- Newton (0 members)
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- EuclideanSpace (0 members)
- StringData (1 member)
- MassSquareTimeUnit (1 member)
- Corporation (87 members)
- Surface roughness (0 members)
- UltrasonicTesting (0 members)