A file, folder, or program =P
Icon
"ico" is a common extension for an icon. An icon is the image you see in a file browser or on your desktop. That icon will represent a file.
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icon
ICON
an icon
Icon is a picture that represent a computer object or feature.
The presidents represent a national icon of the United States.
icon
an icon
menu button
Icon is not an abbreviation or initialism. An icon, in the historical sense, was an object used to represent something else, usually a god or spirit. In today's usage, an icon is a representation of a program or file in a GUI (graphical user interface).