en.wikipedia.org/wiki/IOS

iOS (formerly iPhone OS) is a mobile operating system created and developed by Apple Inc. exclusively for its hardware. It is the operating system that presently ...

en.wikipedia.org/wiki/IPhone_OS_1

iPhone OS 1 is the first major release of iOS, Apple's mobile operating system. iPhone OS 1.1.5 is the latest and the last version of Apple's iPhone OS 1.

en.wikipedia.org/wiki/IOS_version_history

Apple announced iPhone OS 3 in March 2009, and it was released to the public on June 17, 2009 alongside the iPhone 3GS.

www.lifewire.com/what-is-ios-1994355

Sep 5, 2018 ... Formerly known as the iPhone OS, iOS is Apple's mobile operating system that runs the popular iPhone, iPad, and iPod Touch mobile devices.

searchmobilecomputing.techtarget.com/definition/iOS

Apple iOS is a proprietary mobile OS that runs on the iPhone, iPad and iPod Touch.

developer.apple.com/iphone

If you've already updated your app for iPhone X, simply build your app with the iOS 12 SDK and test in Simulator, included with Xcode 10, to make sure it looks ...

www.apple.com/iphone

Explore iPhone, the world's most powerful personal device. Check out the new iPhone XS and iPhone XR.

www.theiphonewiki.com/wiki/IOS

May 19, 2018 ... iOS, formerly known as iPhone OS (and just Mac OS X), is the operating system for the Apple TV, iPad, iPad mini, iPhone, iPod touch. iOS has ...

support.apple.com/en-us/HT201685

Sep 17, 2018 ... You can find the version of iOS or iPod software installed on your iPhone, iPad, or iPod with your device or in iTunes.