Just like Microsoft Word has the ability to create subscript and superscript text, the same can be achieved in HTML. The
<sup> tags are a simple addition to your list of tags — they are not included in the CAT curriculum.
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I always suggest that learners create a footer with a copyright symbol and their name on all their HTML pages:
<footer> <p><sup>©</sup>Initial Surname</p> </footer>
Read the post HTML entities for information on the copyright symbol and more.
Read the post Creating a fixed footer with CSS for more information about creating a footer section for your web pages.