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iOS is a mobile operating system developed by Apple Inc. and was first released as iPhone OS in June 2007, coinciding with the launch of the first generation iPhone.[1] iPhone OS was renamed iOS following the release of the iPad, starting with iOS 4.[2] With iOS 13, Apple began offering a separate operating system, iPadOS, for the iPad. iOS is also the foundation of the newer audioOS and tvOS, and shares some of its code with macOS. New iOS versions are released yearly, alongside new iPhone models. From the launch of the iPhone in 2007 until the launch of iPhone 4 in 2010, this occurred in June or July; since then, new major versions are usually released in September, with the exception of iOS 5, which released in October 2011. Since the launch of the iPhone in June 2007, there have been 18 major releases of iOS, with the current major version being iOS 18, released on September 16, 2024.
- ^ Holland, Patrick. "The iPhone at 15: Steve Jobs revealed his greatest product in 2007". CNET. Archived from the original on January 28, 2022. Retrieved January 28, 2022.
- ^ "iPhone OS gets new name, video calling". Macworld. June 27, 2010. Archived from the original on February 6, 2012. Retrieved February 4, 2017.