This sounds like a test or interview question. Looking up the commands should give you an idea of how/why it can be used. But the real question is why do you want to know "real scenario" where you can use it? Are you not currently faced with a "real scenario" where you need to use it?
Last Wiki Answer Submitted: October 27, 2010 1:52 pm by Joy Stalnecker170 pts.
If you live outside the United States, by submitting your email address you consent to having your personal data transferred to and processed in the United States.
homework? Interview Questions?
You can override from one output queue to another, change a source drawer, change the print text or user data fields (things like that).