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You want the POD included in the CGI.pm module. You can get a nice HTML version on CPAN: CGI, or just run perldoc CGI on your local machine.

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<code> <a> <b> <big> <blockquote> <br /> <dd> <dl> <dt> <em> <font> <h1> <h2> <h3> <h4> <h5> <h6> <hr /> <i> <li> <nbsp> <ol> <p> <small> <strike> <strong> <sub> <sup> <table> <td> <th> <tr> <tt> <u> <ul>
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Want more info? How to link or How to display code and escape characters are good places to start.