ARIA Links and Buttons: Take me somewhere special!
Standard A tag as an ARIA Button:
The Moon
Standard DIV tag as an ARIA Button:
San Francisco
Standard SPAN tag as an ARIA Link:
Ukiah
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The ARIA link and button controls are keyboard accessible. 

Press the Tab key to navigate between the ARIA link and button controls. 
Press the Enter key to activate the selected link or button.
Mouse users can click a link or button to activate it as usual.