Hi, Mark:

These are considered common or standard web fonts:

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Arial - Arial Bold Arial Italic Arial Bold Italic

Times - Times Bold Times Italic Times Bold Italic

Courier - Courier Bold Courier Italic Courier Bold Italic

Georgia - Georgia Bold Georgia Italic Georgia Bold Italic

Verdana - Verdana Bold Verdana Italic Verdana Bold Italic

Geneva - Geneva Bold Geneva Italic Geneva Bold Italic