iOS
iOS is a mobile operating system developed by Apple Inc. for use on iPhone, iPad, and iPod touch devices. It is based on the macOS operating system, and offers a range of features and tools for users, including a user-friendly interface, support for a wide variety of applications, and integration with other Apple services such as iCloud and Apple Music. iOS is known for its security, reliability, and ease of use, and is widely used by consumers and businesses around the world.