It was a decade ago today that Apple’s first iPod digital music player was released, forever changing the world’s relationship to music. No longer would people on the move have to choose their favorite handful of CDs for their commute to work or trip to the gym. Entire record collections could suddenly be jammed into one’s back pocket. The iPod would go on to be recognized as one of the crowning achievements of Apple founder Steve Jobs. Walter Isaacson, author of “Steve Jobs: A Biography,” and speaks about the device’s legacy.