Code and Output for acronym:

Code:

    <!DOCTYPE html>
    <html>
    <head>
      <title>HTML Example</title>
    </head>
    <body>
      <h2>An acronym or abbreviation should be marked up with the <abbr>tag.</h2>
      <p>The <abbr title="World Health Organization">WHO</abbr> was founded in 1948.</p>
      <p>It doesnot support HTML5</p>
    </body>
    </html>
  

Output:

An acronym or abbreviation should be marked up with the tag.

The WHO was founded in 1948.

It doesnot support HTML5