Apple Macintosh PowerBook 150 - Manual (Page 151)

For example, suppose you created a file on your Macintosh named
July Budget.DOC
If you viewed the same file on a DOS computer, its name would be
!JULYBUD.DOC
The exclamation mark (!) indicates that the name has been shortened.
A file can thus have two names: a long name (for when the file is displayed
on the Macintosh) and a short name (for when it’s displayed on a DOS
computer).
While using a DOS-format floppy disk on the Macintosh, you can see a
document’s short name by selecting the document, choosing the Get Info
command from the File menu, and clicking the document’s name in the Info
dialog box. (For this procedure to work, you must have the File Sharing
Extension installed.)
Viewing the contents of a disk on your DOS computer
When you view the directory of a disk on your DOS computer, you might
notice additional directories named RESOURCE.FRK. These directories
contain important information, known as resources, which are contained in
some Macintosh documents.
WARNING Do not delete or move any directories named
RESOURCE.FRK, and do not move any files out of these directories.
143 Exchanging Files with DOS or Windows
Long name Short name