 only an icon or image. For example,
    				a triangle image rotated 90 degrees clockwise is commonly used in many
    				user interfaces to indicate a "Play"   button control. This "Play" icon
    				mimics interface metaphors from many non-software consumer products,
    				and is often presented in a user interface without any nearby visible
    				text information that explains the purpose of the control. Another
    				example is a "thumbnail" metaphor where a small image serves
    				as a cont