AAR		Association of American Railroads       
ABNT		Associaçao Brasileira de Norma Tecnicas
AFNOR		Association Francaise de Normalisation
AISI		American Iron and Steel Institute
ANSI		Amereican National Standards Institute
API		American Petroleum Institute
ASME		American Society of Mechanical Engineers
ASTM		American Society for Testing and Materials
AWS		American Welding Society
BS		British Standards
BSI		British Standards Institution
BTU		British Thermal Unit
DIN		Deutsche Industrie Normem
EJMA		Expansion Joints Manufactures Association
FS		Federal Specification
GOST		Gosudarstuenny j Komitet Standartor
IEC		International Electrotechi cal Comission
ISA		Instrument Society of America
ISO		International Standardization Organization
JIS		Japanese Industrial Standards
MITI		Ministery of International Trade and Industry
MSS		Manufactures Standardizations Society
NACE		National Association of Corrosion Engineers
NBN		Institute Belge de Normalization
NEMA		National Electrical Manufacturers Association
NFPA		National Fire Protection Association
NFPA		National Fluid Power Association
NPT		National Standards Pipe Threaded Taper
SAE		Society of Automotive Engineers
SI		Sistema Internacional de Unidades
TEMA		Tubular Exchanger Manufacturers Association
UNI		Ente Nazionale Italiano di Unificazione
VDI		Verein Deutscher Ingenieure	

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