iOS was first publicly shown running on the original iPhone in January 2007 by Steve Jobs during one of his best product announcements. The highlight of the OS was its use of multitouch as the primary mode of input, the touchscreen keyboard and the fully-featured Safari browser. iPhone OS 2.0 launched the App Store that revolutionalised the entire software industry, iPhone OS 3.0 added copy/paste.
With version 4.0, iPhone OS was renamed to iOS to take into account the iPad, and the release added multitasking and an app switcher. iOS 5 added Notification Center, iOS 6 killed Google Maps, iOS 7 brought a whole new look to iOS and we’ve been tracking all the changes in iOS 8 since it was introduced.
[via The Verge]