I.D. – A station’s legal identification, usually given at the top of the hour.

Inflection –The blending of the voice that carries us from one pitch to another.

Interference – Static caused from another radio or TV station due to being broadcast over the same band.

Imaging – The type of promos (Fifties Rock) or how one positions a radio station within the marketplace which defines the station so that the listener knows what he/she will get when they tune in.