Main tags - lists

Unordered list of elements 
<ul>
<li> First </li>
<li> Second </li>
<li> Third </li>
</ul>

Ordered list of elements 
<ol>
<li> First </li>
<li> Second </li>
<li> Third </li>
</ol>
Neasted lists 
<ul>
  <li> First </li>
  <li>
    <ul>
      <li> Subpart one </li> 
      <li>
        <ol>
          <li> a </li>
          <li> b </li>
          <li> c </li>
        </ol>
      </li>
      <li> Subpart two </li>
    </ul>
  </li>
  <li> Second </li>
  <li> Third </li>
</ul>