HarmonyOS is an operating system developed by Huawei designed to work across various devices, including smartphones, tablets, and smart home gadgets. It aims to create a seamless user experience by allowing different devices to communicate and work together efficiently. Launched in 2019, HarmonyOS supports a wide range of applications and services, making it versatile for developers. It emphasizes security and performance, providing users with a smooth interface and quick access to features, while also promoting the integration of the Internet of Things (IoT) for smarter living environments.