HTML ABBR TAG - TITLE ATTRIBUTE
Run 
<!DOCTYPE html>  
    <head>  
        <title>HTML abbr Tag - Title Attribute</title>  
    </head>  
    <body>  
        <h3>Example of abbreviation tag using title attribute</h3>  
        <p>Please hover the mouse over the content to get the description of the abbreviation.</p>  
        <p><abbr title="HyperText Markup Language">HTML</abbr></p>
    </body>  
</html>