The typeface used in printed matter: compare "Arial" with "Courier" or "Times." One of the frustrating things about publishing material online is that you cannot control what font people will use. I chose a font called "Arial" for this page, but when you look at it on your site, you can force it to be another font. Also, if a font is not installed on a customer machine, their computer will substitute something else (maybe something less readable).
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