**Which company is known for its iOS operating system?**
Apple Inc. is the company known for its iOS operating system. Launched in 2007, iOS is the software platform designed for Apple's mobile devices, including the iPhone, iPad, and iPod Touch. It is renowned for its user-friendly interface, robust security features, and extensive ecosystem of applications available through the App Store. Apple consistently updates iOS, introducing new functionalities and enhancements, which contributes to its popularity among consumers and developers alike.