Standardization system

	ELECTRO- TEHCHNOLOGY	TELECOMMUNICATIONS TECHNOLOGY	OTHER TECHNOLOGY
INTERNATIONAL LEVEL	IEC IEC-standards	ITU ITU-guideline	ISO ISO-standards
EUROPEAN LEVEL	CENELEC EN-standards	ETSI EN standards	CEN EN-standards
NATIONAL LEVEL (FINLAND)	SESKO Finnish Electrotechnical Standards Association SFS standards	FICORA Finnish Communications Regulatory Authority SFS-standards	SFS Finnish Standards Association SFS-standards