On one hand, technology for portable music had been developed since the 80s with Sony driving the area with its portable walkman.

It was the first device to make music properly portable, to give us a soundtrack to every day.

They also noted that the market for portable digital music is still in its infancy.

Youthful silhouettes rocking out may be the new fresh faces of portable digital music, but - shh!

Companies like Apple and Samsung passed it in portable music and televisions.

Laura Brown, 30, who not long ago began commuting through crowded Grand Central, had never been driven to portable music before.

Songs-to-go, most readily available on portable music players, seem to appeal to fans across the board.

So I could have portable music as well as my friends' phone calls and the e-mails and the Web.

Copying your CD's onto a portable music player no longer requires computer literacy - or even a computer.

The real profit is in selling its wildly successful portable music player, the iPod.