<html> <!-- Root element -->
<head> <!-- Metadata container -->
<title> <!-- Page title -->
<body> <!-- Visible content -->

<h1> to <h6> <!-- Heading levels 1-6 -->
<p> <!-- Paragraph -->
<br> <!-- Line break (self-closing) -->

<strong> <!-- Bold -->
<em> <!-- Italic -->
<u>  <!-- Underline -->

<ul> <!-- Unordered list -->
<ol> <!-- Ordered list -->
<li> <!-- List item -->

<a href="">  <!-- Link -->
<img src=""> <!-- Image (self-closing) -->