Or it can be given an internal name (volume label). The volume label can be composed of 1to 11 characters. The user can name it or skip. But if the command Format under MS-DOS is applied to format disk, the system will not remind the user to input the original volume label unless the format process is finished.
Basic needs refers to those fundamental requirements that serve as the foundation for survival.
A function is described as a set of inputs, the behavior, and outputs (see also software). Functional requirements may be calculations, technical details, data manipulation and processing and other specific functionality that define what a system is supposed to accomplish. typical functional requirement will contain a unique name and number, a brief summary, and a rationale. This information is used to help the reader understand why the requirement is needed, and to track the requirement through the development of the system.