This is where things get even stranger. The directory is used to represent information and data related to “processes”. As such, each item in this directory not only has no storage associated, but it also is not associated with any hardware device.
However, strange as it is, this is also a good example of how the “everything is a file” approach is useful. For example, a user with sufficient privileges can use utility programs intended for files to search for specific patterns in data memory of processes, or which library is used by a process.
The illustion of files in this directory is a feature that distinguishes Unix-like operating systems from other operating systems.