<!DOCTYPE html>
<html lang="en-US">
<head>
<style>
#point:after{
content:"\001A0";
}
</style>
</head>
<body>
<p>Uppercase O Horn using Hexa Decimal: Ơ</p>
<p>Uppercase O Horn using HTML Code: Ơ</p>
<p id="point">Uppercase O Horn using CSS Entity: </p>
</body>
</html>