Dell Inspiron 7500 Reference And Troubleshooting Manual page 12

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Screen text is text that appears on the screen of your display or external monitor.
It can be a system message, for example, or it can be text that you are instructed
to type as part of a command (referred to as a command line). Screen text is
presented in the Courier New font.
Example: The following message appears on your screen:
No boot device available
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Variables are symbols for which you substitute a value. They are presented in
italics.
Example: module n (where n represents the memory module number.