HTML Learning (iii) Classification learning

Code:

Effect:

Introduced:
<abbr> (for abbreviations),<em> (for emphasis),<strong> (for stronger emphasis),<cite> (representing a reference),<address> (representing the address), and so on. These tags do not exist to define the display effect, so they may not have any effect from the browser, or the different browsers may have a different display effect on these labels.
A very long article, if there is a suitable small title, you can quickly to the content of the general understanding. In HTML, the tags used to denote headings are: 
HTML Learning (iii) Classification learning