Introducing the iPod more than 10 years ago, the late Steve Jobs said of the music market: “It’s part of everyone’s life, it is a very large target market, all around the world. It knows no bounds.”

He was talking on October 23, 2001, when, as Apple's chief executive, dressed in his trademark jeans and black polo, he introduced the breakthrough MP3 music player to a small audience. Ten years later, the firm has sold several hundred million of the devices and the focus has now moved to new products, such as the iPhone - more than 17 million sold in the final three months of last year - and the iPad, which sold 11 million in the same period.