«In a way radio was an iPod long before Apple invented iPods.
After all, radios were portable analog music devices that allowed baby boomers to carry their music around with them 24 hours a day.
The iPod of today gives the listener total choice -- the music they want, when they want it and in whatever (or no) special order.
Back then, the predecessor to the Apple iPod was a transistor radio and an entire generation grew up with their radios to their ears -- just as today, ear plugs and all.
The forerunner to the "iPod" lacked the level of choice that today's Apple device has, but it had something even more valuable to young baby boomers -- air talent.»

fonte: Radio: the anchestor of the iPod 20/11/07