In the years before the popularization of mobile phones, some motorists rationalized that a CB radio would be good to have in the car for emergencies.

FORBES: The Push-To-Talk Push

In those days, the must-have gadget of the trucker craze was the CB radio, the method by which truckers kept in touch and warned each other of lurking "Smokies, " or police officers, setting speed traps.

FORBES: The Push-To-Talk Push

They bought CB radio sets in droves, learned a spatter of the lingo and imitated The Dukes of Hazard from Friday-night TV, while their kids learned it from the CB Bears cartoon on Saturday morning.

FORBES: The Push-To-Talk Push