علائم برخی کدها و استاندارد های فنی رایج:

ASME  = American Society of Mechanical Engineers
AIChE  = American Institute of Chemical Engineers
API       = American Petroleum Institute
ANSI    = American National Standards Institute
ASTM  = American Society for Testing and Materials 
AGA     = American Gas Assoiciation
NFPA   = National Fire Protection Association
NACE   = National Association of Corrosion Engineers
ISO       = International Organization for Standardization
ISA       = International Society of Automation
IEC     = International Electrotechnical Commission
TEMA  = Tubular Exchanger Manufacturers Association
BSI       = British Standards Institution
DIN      = Deutsches Institut f-r Normung (German Institute for Standardization)
JSA      = Japanese Standards Association
IPS       = Iranian Petroleum Standards
IGS      = Iranian Gas Standards