The following categories exist on the wiki, and may or may not be unused. Also see wanted categories.
- FuelRole (3 members)
- PowerPlantPortfolio (0 members)
- EmpiricalDataSet (1 member)
- Milligram (0 members)
- GasGridComponent (0 members)
- GramPerDeciliter (0 members)
- Request (1 member)
- Article (17 members)
- LiquefiedPetroleumGasVehicle (1 member)
- Syngas (0 members)
- Microgram (0 members)
- SolarPowerUnit (2 members)
- Bemerkung (0 members)
- FuelCommodityRole (0 members)
- VoltSecondPerSquareCentimeter (0 members)
- PlaqueFormingUnit (0 members)
- EuLegislationSectorDivision (0 members)
- Characteristic (4 members)
- Foot (0 members)
- Steradian (0 members)
- ModelComponent (0 members)
- OperationalLifeTime (1 member)
- ProcessDuration (0 members)
- EnergyServiceDemand (2 members)
- Department (0 members)
- ElectricityGridComponent (4 members)
- MicroscopyProcess (2 members)
- ClimateSystem (0 members)
- HardnessTest (3 members)
- OSW952351f9cdf551ee8b6de98467bbc61d (1 member)
- CountsPerMinute (0 members)
- IndependentContinuant (2 members)
- SolidSyntheticFuel (0 members)
- SimulationProcess (0 members)
- BuildingSector (0 members)
- EnergyUse (1 member)
- KilogramPerLiter (0 members)
- Region (0 members)
- ConstructionTime (0 members)
- Bicycle (1 member)
- Nanosecond (0 members)
- MeritOrder (0 members)
- FlowPotential (5 members)
- Reservoir (0 members)
- OrganisationRole (0 members)
- PowerLine (2 members)
- MassPercentage (0 members)
- Peat (0 members)
- TaskStatus (3 members)
- Requirement (0 members)