Google introduced API for cross-browser font connection

Google Font API - API for connecting non-standard fonts.

< html >
< head >
< link rel = "stylesheet" type = "text / css" href = "_http: //fonts.googleapis.com/css? family = Tangerine" >
< style >
body {
font-family: 'Tangerine', serif;
font-size: 48px;
}
< / style >
< / head >
< body >
< h1 > Making the Web Beautiful! < / h1 >
< / body >
< / html >

Google identifies the browser and provides valid CSS and font.

Google Font Directory - a set of fonts.
WebFont Loader - JavaScript library for advanced work with the API.