What do HTML tag abbreviations mean

<HTML> HyperText Markup Language Opening command on the HTML page <HEAD> head Source text header (contains TITLE, LINK, META ...) <BODY> body Page body (the content of the page that can be displayed) <BR> break new line <P> paragraph Paragraph, example:

(justified) <HR> horizontal rule horizontal line, example:

<H1> heading 1st order heading (24 pt, bold),

(14 pt, bold) <B>, <U>, <I> bold, underlined, italic bold, underlined, italic, heading <OL> ordered list numbered list,
    , type = I <UL> unordered list Aufzählung,