In which aspect, iTunes turned out to be a huge success in music industry?

Steve Jobs, who fought against pancreatic cancer for a number of years, left the world in late 2011, at the age of 56. Steve Jobs always emphasized technology could change the world. Charles Arthur, technology editor with The Guardian newspaper, says Apple’s products redefined three entire industries, music, mobile telephony and personal computing.
    Through iTunes, Jobs provided a simple way for users to buy digital content where previously they would have downloaded pirated copies. The iTunes store turned out to be a huge success. They sold millions of songs in the first year. What’s more, Jobs delivered the iPhone in Jan., 2007. The moment the iPhone was out, the amazing electronics device created a stir around the world. Crowds of people were willing to queue up for hours in the hope of getting their hands on an iPhone as soon as possible, upon its original launch worldwide. The iPhone is not merely for making calls. Its function centers around the apps that were designed for it. For iPhone users, it is a gateway to amazing downloadable software, be it for shopping, entertainment or studying.
    What Jobs left us is not confined to cool gadgets, such as one-button iPhones which do much more than just making phone calls, or the iPod with a scroll-wheel which allows you to easily browse thousands of songs in seconds, or the iPad which surprises you with its size, weight and powerful functions.
    More importantly, Jobs inspired us to be innovative, to seek perfection relentlessly, and to simplify complicated things to make life better with the help of ever-changing technologies.