FREQUENCY SPECTRUM:

The is a one dimensional continuum that shows ascending frequencies and
the various classifications and uses of those frequencies.

Scale in cycles/sec (Hz)

0-20Hz     infrasonic
20-10KHz   audible
75Hz       hummingbird
190Hz      bummblebee
>3KHz      radio services, managed by Federal Communication Commission
(FCC)
3K-30KHz   Very Lo Freq (VLF)
30K-300KHz Lo Freq (LF) marine & aeronautical navigation
300K-3MHz  Med Freq (MF) AM, LORAN, long dist marine & aero.
3M-30MHz   Hi Freq (HF) shortwave, amateur radio, & CB
30M-300MHz Very Hi Freq (VHF) private land mobile (police/fire, dispatch) 
                            TV (chan 2-13), FM, cordless phone, baby mon.
300M-3000MHz (3GHz) Ultrahigh Frequency (UHF) UHF TV, cellular phones,
           carrier point-to-point microwave

10^15Hz Narrow band of visible spectrum (red/orange/yellow/green/blue
        indego/violet) (rem: ROY G BIV)  
       
10^ ?  Ultraviolet
10^ ?  X-Rays
10^ ?  Gamma Rays