Is there any way for pushing fonts into users system

Is there any way for pushing fonts into users system

Is there any method for using a font which is not installed in user
system. Till now I knew that font styles are applied in this manner
.my-style{
font-family:Arial, 'Liberation Sans', 'DejaVu Sans', sans-serif;
}
so that to if first font is not available in users system it fallback to
use second font type. But I observed that Google uses this font style in
google+
body{
font: normal 13px Roboto,arial,sans-serif;
}
Now Roboto font is not installed in my PC instead of this the Roboto font
is used through out the google+, I also tried using the same font style on
sample page but it didn't worked.