<!DOCTYPE HTML> <html> <head> <meta charset="UTF-8"> <title> acronym </title> <style> strong { color: red } </style> </head> <body> <p>An acronym for the World Wide Web is <strong> <acronym title="World Wide Web">WWW</acronym></strong> </p> <p>This file contains <strong><acronym title="World Widw Web">WWW</acronym></strong> </p> <p>The 'experimental' Nu Markup Checker flags this as an <strong>ERROR</strong> with the string <strong> "Error: The acronym element is obsolete. Use the abbr element instead."</strong> </p> </body> </html>