The @font-face rule is a W3C standard allowing authors to specify online fonts for displaying text on their webpages.
Example:
@font-face {
font-family: "Example Font";
src: url("http://www.example.com/fonts/example");
}
h1 {
font-family: "Example Font", sans-serif;
}
For more information see the W3C article on the @font-face rule.