What is the main function of an operating system?

The main function of an operating system is to manage computer hardware and software resources. The operating system acts as an intermediary between users and the computer hardware, ensuring that different applications can operate efficiently by coordinating their access to the memory, processor, storage devices, and other hardware components. It provides essential services such as task scheduling, resource allocation, and error handling, which are crucial for the stable and efficient operation of a computer system.

Additionally, operating systems offer a platform for various applications to run, which requires them to manage applications and handle tasks like file system management and security protocols. This core functionality is what enables other software applications to function effectively on the hardware without directly interacting with the machine's low-level resources.

User interface design, data analysis, and enabling mobile applications are functionalities that may be supported by an operating system but are not its main objectives. The focus of the operating system is ensuring resource management and providing a stable environment for applications to operate.