Assertion: operating system's user interface | /r/HasProperty | shell
Facets:
value: usually
type: TEMPORAL
Source sentences:
text: An operating system also includes applications like the user interface (shell, gui, tools, and services).
text: The user interface is usually referred to as a shell and is essential if human interaction is to be supported.
text: The user interface, also known as the shell, is either a command-line interface (CLI), a graphical user interface (GUI), or controls attached to the associated hardware, which is common for embedded systems.