iPhone 4S' proprietary feature Siri voice assistant is considered to be the most potential feature of iPhone 4S. Siri need the mobile to have a strong computing power, and need to rely on the cloud computing to complete. 
Now iOS 5 and iCloud have been officially released, Apple's cloud computing is experiencing the test of millions of users, users can now use iCloud for free to do data backup and synchronization for the device.
In the middle of 2009, Apple acknowledged to have planned to spend 1 billion dollars in building a world-class data center in North Carolina in nine years, which will be Apple's third data center, Asmyco's Horace Dediu said that Apple has spent $ 750 million dollars on this huge data center. Apple related resource: dvd to ipad converter for mac. But Apple's original plan is to spend 1 billion within nine years, and now the construction of the data center has spent 3 / 4.
This does not include the servers, storage devices, operating personnel, R & D, licensing, loan and other costs. Currently very few companies are willing to spend hundreds of millions of dollars to build the data center.
The data center in North Carolina has been on the line before Apple announced iCloud at WWDC, Steve Jobs said in the keynote that in this data center there are all very expensive equipments. Some analysts pointed out that Apple is likely to continue to build data centers around the world, in order to be able to push video contents to user terminal. Apple also hired Microsoft's former data center genius Kevin Timmons in April this year. Extended reading: dvd converter for ipad.
Last month Tim Cook promoted iTunes supervisor Eddy Cue to be network softwares and services executive, he is responsible for all Apple cloud computing related services, including the iTunes Store, App Store, iBookstore and iCloud service.
