Before Spotify or iPhones, Apple redefined how we listen to music by introducing the iPod in October 2001. <PERSON> revolutionized the mp3 player by targeting its flaws such as having a short battery life, not holding a lot of songs and simply being unfashionable. It was hard to walk down the street without seeing an iPod maybe because over 220,000,000 iPods have been sold throughout the world easily becoming the highest selling audio player.