#FFFF00
#FF0000
#00FF00
<select>
<option>
<dropdown>
<list>
To collect user input
To create a table
To display images
To create links
SAFE
GET
SECURE
POST
<!-- comment -->
// comment
<comment>
<!-- comment !-->
srcset
sources
<source> tag inside <audio>
media
<ul>
<ol>
<li>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01//EN">
<!DOCTYPE html SYSTEM "about:legacy-compat">
<!DOCTYPE html>
<!DOCTYPE html5>
<input>
<marquee>
<p>
<table>
<hr>
<br>
<line>
<divider>
<body color=“yellow”>
<body bgcolor='yellow'>
<background>yellow</background>
<color background='yellow'>
width
size
thickness
weight
<textarea>
<form>
<textfield>
<dl>
Steve Jobs
Tim Berners-Lee
Bill Gates
Vint Cerf
Styling Pages
Providing Information about Web Pages
Executing Scripts
Database Queries
Old browsers fail
Old HTML works in HTML5
New tags fail
CSS fails
<body> -<head> -<html>
<html> -<head> -<body>
<head> -<html> -<body>
<html> -<body> -<head>
<TD>
<P>
<TR>
Method
Action
Both (a)&(b)
None of these.
