Most users have a single directory under which all files are grouped.
More complex directory structures are possible, and are introduced briefly below. During a single terminal session you may create or change many files. Typing DIR at the system prompt will list all the files in the current directory. Navigating Subdirectories Directories imply a hierarchical structure with a common directory called the home or root directory and several layers of user-defined subdirectories. You can create directories for any type of data.