Apple has revolutionized how we listen to music, surf the web, and communicate! I liken the iPod, iPad, and iPhone suite of devices to the invention...

Apple has revolutionized how we listen to music, surf the web, and communicate!  I liken the iPod, iPad, and iPhone suite of devices to the invention of the telephone, automobile, or television.  Strategically speaking, how was Apple able to accomplish this?  Prior to answering, I encourage you to conduct some quick internet research to gain an understanding of Apple's strategic objectives over the last 5-10 years.

No less than 100 words please!