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iPod
There had been MP3 players before it but Apple invented/unveiled the original iPod, they revolutionized and popularized this kind of device. It was a phenomenon because it was easier to use than other MP3 players and had more storage. The iPod made it possible to carry "1,000 songs in your pocket" just like the advertisements said and made the popularity of CDs decline. -
iPod nano
Apple invented the iPod nano and unveiled it on September 7, 2005. It revolutionized portable devices because it was much smaller than many others and therefore easier to take with you. -
iPhone
Steve Jobs and Apple invented the iPhone and unveiled it on June 29, 2007. This device popularized touch screen devices and was another phenomenon because it was a smartphone that had an iPod in it. -
iPod touch
Apple invented the iPod touch and unveiled it not long after the iPhone. It was released on September 5, 2007. It further popularized touch screen devices and became the most popular iPod. -
Macbook Air
Apple invented the MacBook Air and unveiled it in early 2008. It revolutionized laptops because it was much thinner and easier to take with you than ones that come before it.