The following categories exist on the wiki, and may or may not be unused. Also see wanted categories.
- freight train station (0 members)
- software licence (0 members)
- template generated ontology module (0 members)
- compressed biomethane (0 members)
- liquefied petroleum gas car (0 members)
- diesel engine (0 members)
- slug (0 members)
- hard coal power unit (0 members)
- Elliptical (0 members)
- Blank (0 members)
- absorbance unit (0 members)
- fossil combustion fuel (6 members)
- Aging Interval (0 members)
- combined heat and power generation process (0 members)
- switchyard (0 members)
- transport performance value (0 members)
- grid supplied electric vehicle (0 members)
- fiat object part (1 member)
- fee (0 members)
- kibibyte (0 members)
- Prüfkörpername (0 members)
- Transition Point (1 member)
- hour (0 members)
- rooftop photovoltaic power plant (0 members)
- PV panel (0 members)
- OSW3722e97235a65b75b37534311e80b1c2 (1 member)
- bridge (0 members)
- levelised cost of electricity (0 members)
- OwlThing (4 members)
- Physical Item (1 member)
- nuclear power plant (0 members)
- underground hydrogen storage object (0 members)
- Brucheinschnürung (0 members)
- variable (3 members)
- kilodalton (0 members)
- hydrogen fuel cell (0 members)
- parameterisation (0 members)
- thermal energy storage function (0 members)
- forecast error (0 members)
- Risk assessment process (0 members)
- decibel (0 members)
- energy demand (2 members)
- aggregation type (0 members)
- image resolution unit (3 members)
- solid fossil fuel (3 members)
- written name (0 members)
- nanogray (0 members)
- Creep Stress (0 members)
- purity percentage (0 members)
- Calibration Document (0 members)