Commonly Used Font Combinations
The font-family property should hold several font names as a "fallback" system, to ensure maximum compatibility between browsers/operating systems. If the browser does not support the first font, it tries the next font.
Start with the font you want, and end with a generic family, to let the browser pick a similar font in the generic family, if no other fonts are available:
font-family : Georgia, serif
font-family : "Palatino Linotype", "Book Antiqua", Palatino, serif
font-family : "Times New Roman", Times, serif