Understanding Files And File names

A computer file is a block of arbitrary information, or a resource for storing information, which is available to a computer program and is usually based on a durable storage. A file is durable in the sense that it remains available for programs to use after the current program has finished. Computer files can be considered as the modern counterpart of paper documents which traditionally were kept in offices' and libraries' files, which are the source of the term.

Reference:http://en.wikipedia.org/wiki/Computer_file