Desktop
icons are the most commonly recognized icons
by most people. They are used to convey purpose
of an available function on a computer.
On a very graphic oriented Windows environment such
as Windows XP the common desktop icons you might see
are “My Computer”, “Recycle Bin”,
and various file folders with labels. See the example
below:
Other operating systems such
as Macintosh, and Linux desktop environments like KDE
also use desktop icons in much the
same way but the extension, resource or file name suffix
differ. Generally icons from one operating system would
need to be converted to work on a different OS.
Desktop Icon File Types (file
name suffix):
Windows (.ico)
Macintosh (.icns,
.rsrc23, and/or inside resource fork)
Linux
Desktop Environments Like KDE & Gnome (.png
and possibly other formats like .svg)