Since HTML was originally created by scientists for sharing information with each other, there are a lot of text tags that are meant to make webpages look like academic papers. The three listed here are the only ones I've actually used.

BLOCKQUOTE is a container tag which formats the text as a quotation, indenting it from both right and left margins. Like this:

Once upon a time, along about next Thursday, there was a bear who lived in the Thousand Acre Woods under the name of Saunders. Saunders wasn't his name, it was painted on a sign over the door to his house, and so he lived under it.

It doesn't take any attributes, and can contain other valid HTML style tags.

PRE is a very handy tag. Text within a PRE tag is displayed exactly as it was entered into the source code, with all line breaks and spacing preserved. It is a container tag, takes no attributes and can have other active tags within it. It will recognize HTML coding, so if you want the code to display use:

XMP. This is a container tag, which takes no attributes, and displays the text within it exactly as entered into the source code, including all line breaks and spacing. It does not recognize HTML tags inside it.