Each file must have a filename and an extension. A filename is the label you assign to each file for identification. Filenames may contain up to 39 characters. Filenames should be descriptive of the file contents to make them easier to identify. No spaces are allowed.
Extensions are the characters that follow the period in a filename.
They are used to help group related files. For instance, letter.txt , papers.txt , and homework.txt would all be text files. Each file also has a version number, separated from the extension by a semicolon, which usually represents how many times the file has been modified. In most cases, it is not necessary to specify the version number. Using EVE Entering EVE You can edit a file by using the EVE editor.