Which of the following is an example of system software?

Windows Vista is an example of system software because it is an operating system that manages computer hardware and software resources and provides common services for application software. System software serves as a bridge between hardware and user applications, enabling users to interact with the computer system effectively.

In contrast, Microsoft Word and a photo editor are examples of application software, as they are designed to perform specific tasks for the user, such as word processing and image editing, rather than managing system resources. A web browser also falls under application software, as it enables users to access and navigate the internet but does not control hardware or system resources directly.