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From The Glossary of Digital Photography
A small graphical link to a program, command, or other object used in a computer interface. Thus a link to the trash is a drawing of a trashcan, a link to a folder is a picture of a file folder, and a link to a disk drive looks like a miniature disk drive. Often, each program will have a picture to represent it, so as to make it easier and
faster for users to find and use the link.
