System software is software that provides a platform for other software. Examples include the kernel and device drivers of an operating system (OS). A program that runs in the context of the platform is classified as application or utility software based on the functionality it provides and the role of intended users. Application software provides for the normal use of a computer, without regard to how the computer works or what it needs to function. It is used to accomplish end user tasks such as writing documents, playing video games, listening to music, drawing pictures, browsing the web and developing software. Utility software supports managing system hardware and software.