Classifications

Economic Activities

• International Standard Industrial Classification of all Economic Activities - ISIC Rev. 3 (UNSD, 1990)
  
  
• International Standard Industrial Classification of all Economic Activities - ISIC Rev. 4 (UNSD, 2006)
  
  
• NACE Divisions (Eurostat)
  
  

Fuel Energy and Mineral Resouces

• United Nations Framework Classification for Fossil Fuel Energy and Mineral Resources (UNECE)

Bioenergy

• UBET - Unified Bioenergy Terminology (FAO)