The following categories exist on the wiki, and may or may not be unused. Also see wanted categories.
- Siemens (0 members)
- OffshoreWindFarm (0 members)
- Wave (0 members)
- PowerOnlyGeneratingUnit (0 members)
- Microsievert (0 members)
- LiquefiedNaturalGas (0 members)
- Angstrom (0 members)
- Bruchdehnung (0 members)
- RenewableFuel (4 members)
- Stone (0 members)
- Ausscheidungsabstand (0 members)
- Picomolar (0 members)
- OSW8a3c9b84b0d25200a68acad817c9ff93 (1 member)
- DemandTrader (0 members)
- SolarThermalEnergy (0 members)
- ObjectiveVariable (0 members)
- InflationRate (0 members)
- SimulationModel (0 members)
- TestOntologyClassA1 (2 members)
- Nanoliter (0 members)
- Yotta (0 members)
- PixelDensity (0 members)
- ExtensometerGaugeLength (0 members)
- HydroStoragePowerPlant (2 members)
- Melting (0 members)
- VariableCost (3 members)
- WebService (1 member)
- AbgeschätzteDehngeschwindigkeitÜberDieParalleleLänge (0 members)
- StudySubregion (0 members)
- TractionBattery (0 members)
- PhotovoltaicPowerPlant (2 members)
- FixedCost (0 members)
- Nanomolar (0 members)
- KineticEnergyStorageFunction (0 members)
- Megahertz (0 members)
- IssueLabel (0 members)
- EconomicLifeTime (0 members)
- Transport (3 members)
- NuclearFuel (3 members)
- Co2EmissionValue (0 members)
- Femto (0 members)
- MassVolumePercentage (0 members)
- RotorDiameter (0 members)
- ClosedLoopPumpedHydroStoragePowerPlant (0 members)
- EnergyStorageCapacity (0 members)
- MarineCurrentEnergy (0 members)
- Zepto (0 members)
- OSW8e353a702f1a5e1c8760770961c72185 (1 member)
- NitrogenOxides (2 members)
- CovalentBond (0 members)