iOS, the operating system, which runs on iPhone, iPod, and iPod Touch was known as iPhone OS before June 2010 and at the time of this writing is the third most popular smartphone operating system, holding 16% of the global smartphone market. From the date of its original release, it has been updated every single year, with every update adding some exciting features and the next version, iOS 5, which is expected to be released in the fall, is no different.