What is the primary function of an operating system?

The primary function of an operating system is to manage hardware and software resources. This encompasses a range of responsibilities that are essential for the proper functioning of a computer system. An operating system acts as an intermediary between users and the hardware of the computer, allowing users to interact with the system without needing to understand the complexities of the hardware.

Managing hardware resources includes overseeing components such as the CPU, memory, disk drives, and peripheral devices. The operating system allocates these resources efficiently, ensuring that applications have the necessary access without conflict. Additionally, it manages software resources by providing a platform for applications to run, managing their execution, and handling system calls and user permissions.

While other functions mentioned in the options, such as increasing storage capacity or providing backup services, may be features of specific software or utilities, they do not encapsulate the core role of an operating system. Installing applications automatically can also be a feature facilitated by operating systems, but it is not their primary function.