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Constant width
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Used to indicate anything that might appear in a program, including
keywords, function names, SQL commands, and variable names. This font
is also used for code examples, output displayed by commands, and
system configuration files.
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Constant width bold
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Used to indicate user input.
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Constant width italic
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Used to indicate an element (e.g., a filename or variable) that you
supply.
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Italic
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Used to indicate directory names, filenames, program names, Unix
commands, and URLs. This font is also used to introduce new terms and
for emphasis.
