The document discusses three HTML elements: <pre> for preformatted text that preserves all formatting, <abbr> for abbreviations with a title attribute to display the full term as a tooltip, and <acronym> for pronounceable words formed from initials with a title to show the full phrase. These elements allow for formatting preformatted text, abbreviations, and acronyms in HTML documents.

1. The PREFORMATTED,
ABBREVIATION, ACRONYM
Element

2. The PREFORMATTED Element
 The tag used is <pre></pre>
 This element defines a block
of preformatted text.
 All are preserved exactly as
they appear in your document.

3. The ABREVIATION Element
 The tag used is
<abbr></abbr>
 This element used to
indicate that the text is a
shortened form of a longer
word or phrase.

4. Title
 Provides a text title for the
element. Most web browser
displays the value of the title
as a “tooltip”
 this is not a tag but an
attributes

5. Syntax
<abbr title=“Before the birth of
Christ”>
B.C.
</abbr>

6. The ACRONYM Element
 The tag used is
<acronym></acronym>
 This element used to indicate
that the text is a
pronounceable word formed
the initial letter of the several
words.

7. Syntax
<acronym title=“System
Administrator”>
Sysadmin
</acronym>