An icon is a small graphical representation of a program or file that, when clicked on, will be run or opened. Icons are used with Graphical User Interface (GUI) operating systems, such as Microsoft Windows and the Apple macOS, to help quickly identify a type of file or program associated with the icon. The image to the right is an example of My Computer icons in different versions of Microsoft Windows.
When you double-click or open an icon, the associated file or program will be opened. For example, if you were to double-click on the My Computer icon, it would open Windows Explorer and double-clicking a document or file icon would open that document in the associated program.
Tip: Quickly rename any highlighted Windows icon by pressing the F2 key on the keyboard and typing in a new name for the icon.