There are 2 main lists used in HTML coding, the ordered list and the unordered list. The ordered list is a numbered list, whilst the unordered list is not numbered. Here's a few examples of ordered lists, and unordered lists....

Ordered lists tags are <ol> </ol>

Code	Result
<ol> <li>List item #1</li> <li>List item #2</li> <li>List item #3</li> <li>List item #4</li> </ol>	List item #1 List item #2 List item #3 List item #4

UnOrdered lists tags are <ul> </ul>

Code	Result
<ul> <li>List item #1</li> <li>List item #2</li> <li>List item #3</li> <li>List item #4</li> </ul>	List item #1 List item #2 List item #3 List item #4

Using both Ordered and UnOrdered Lists

Code	Result
<ul> <li>Item 1</li> <ol> <li>Item numbered #1</li> <li>Item numbered #2</li> </ol> <li>Item 2</li> <li>Item 3</li> <ul type="square"> <li>Square Item #1</li> <li>Square Item #2</li> <li>Square Item #3</li> </ul> <li>Item 4</li> </ul>	Item 1 Item numbered #1 Item numbered #2 Item 2 Item 3 Square Item #1 Square Item #2 Square Item #3 Item 4