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What is an iOS Device and What is an iOS Device Used for?
What Is iOS? Apple's iPhone Software Explained - MUO
What is iOS? A Comprehensive Introduction to Apple's OS
What is iOS? Everything You Need to Know - SoftwareLab
What are iOS devices? - 9to5Mac
iOS - Wikipedia
iOS Explained: Apple's Operating System Version History, Features
What is iOS? | Trusted Reviews
What Is iOS? - Lifewire
IOS | Apple, Updates, Software, & Origin | Britannica