RADIO FREQUENCIES
CLASS	ABREVIATION	RANGE
extremely low frequency	ELF	below 3 kilohertz
very low frequency	VLF	3 to 30 kilohertz
low frequency	LF	30 to 300 kilohertz
medium frequency	MF	300 to 3000 kilohertz
high frequency	HF	3 to 30 megahertz
very high frequency	VHF	30 to 300 megahertz
ultrahigh frequency	UHF	300 to 3000 megahertz
superhigh frequency	SHF	3 to 30 gigahertz
extremely high frequency	EHF	30 to 300 gigahertz