The HTML form passes key-value pairs to PayPal in a "variable=value" format; you are required to pass a specific action URL and some input fields.

The HTML 4.0 standard introduced the accept-charset attribute on the <form> element to indicate what character encodings the server must accept.

To create a Web page that collects user information, you design a Web form made of HTML code. The form displays a set of questions and text boxes in the user's Web browser.