FOX Nation host Abby Hornacek takes a closer look at the topics and buzz words you find your friends and coworkers using to sound intelligent. Each week Abby and her expert guests will tackle topics we take for granted and help to explain the roots and meanings behind them.

This week, Daniel A. Piazza, Chief Curator at the Smithsonian National Postal Museum, joins Abby in the classroom to help with her lesson plan. Daniel discusses the history of the United States Postal System, the role the system has had in the larger development of the United States, how the system operates today, and how USPS differentiates itself from other mail delivery services.

Keep up with Abby after class on Twitter: @AbbyHornacek