ISO (the International Organization for Standardization) ----Open Systems Interconnection
ITU (International Telecommunications Union)---Phone and telecommunication hardware
EIA (Electronic Industries Association) ---physical connection interfaces and electronic signaling specifications
FCC (Federal Communications Commission)----authority over interstate and international commerce
The ITU-T (for Telecommunication Standardization Sector of the International Telecommunications Union) is the primary international body for fostering cooperative standards for telecommunications equipment and systems. It was formerly known as theCCITT. It is located in Geneva, Switzerland.