This 55 is something no one would have guessed. Including us. To put it in context, it took us 22 years to sell 55 million Macs. It took us about 5 years to sell 22 million iPods, and it took us about 3 years to sell that many iPhones. And so, this thing is...it’s on a trajectory that’s off the charts.Tim Cook on the 55 million iPads sold to date
Apple sold more iOS devices in 2011 than all the Macs sold it in 28 years.