<ul>- unordered list

<ol>- ordered list

<li>- list item

<dl>- description list

When designing a web page, the most commonly used lists are unordered lists (ul) and ordered lists (ol). Unordered lists are used for presenting items without any particular order, typically represented by bullet points. Ordered lists are used when the items need to be displayed in a specific order, often represented by numbers or letters.

The three sorts of lists
Unordered list – a collection of related objects arranged in no particular order.
ordered list – a collection of similar objects arranged in a specified order.

description list — a list of name/value pairs such as terminology and definitions.