Abbreviations of the radio spectrum Quiz by elevatorman

Frequency and Wavelength	Abbr.	Name
< 3 Hz, >100,000 km		SubHertz
3–30 Hz, 100,000 km – 10,000 km		Extremely Low Frequency
30–300 Hz, 10,000 km – 1000 km		Super Low Frequency
300–3000 Hz, 1000 km – 100 km		Ultra Low Frequency
3–30 kHz, 100 km – 10 km		Very Low Frequency
30–300 kHz, 10 km – 1 km		Low Frequency
300–3000 kHz, 1 km – 100 m		Medium Frequency

Frequency and Wavelength	Abbr.	Name
3–30 MHz, 100 m – 10 m		High Frequency
30–300 MHz, 10 m – 1 m		Very High Frequency
300–3000 MHz, 1 m – 100 mm		Ultra High Frequency
3–30 GHz, 100 mm – 10 mm		Super High Frequency
30–300 GHz, 10 mm – 1 mm		Extremely High Frequency
300–30,000 GHz, 1 mm – 90 um		Terahertz

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