E3 FILENAMES AND FILENAME EXTENSIONS
Each computer-stored file needs to have a unique name (a filename), in order that it can be saved, located or retrieved by the computer’s file management system.
Different operating systems treat files in different ways. Consequently, filenames associated with different operating systems may have different structures or be displayed differently. It is common for the filename to be represented by an icon instead of the text. Nevertheless, most operating systems associated with personal computers have similar filename conventions where, generally, full filenames such as glossary.doc consist of two parts separated by a dot (.).
The first part is chosen by the person who creates the file and is the name by which ...