IAS

International Approval Services

Cleveland, Ohio; USA

ICGTI (Europa)

International Centre for Gas Technology Information; c/o Naturgassens Hus

Hørsholm, Denmark

ICGTI (USA) 

International Centre for Gas Technology Information

Fairfax, USA

IEA

International Energy Agency

Paris Cedex 16, France

IGU

Internationale Gasunion

Hørsholm, Denmark

ISO

International Organization for Standardization

Geneva, Switzerland

IWA

International Water Association

London, United Kingdom

OECD 

Organization for Economic Cooperation and Development

Paris Cedex 16, France

OECD Bonn Office

Organization for Economic Cooperation and Development - Bonn Office

Bonn, Germany