U.S. Government Barchart This newly revised and updated edition of BarCharts' best-selling U.S. Government study guide features an even more comprehensive, in-depth look at the workings of America's highest political systems. Each color-coded section discusses a particular element of the government in detail using key definitions, office and agency descriptions, and timelines of important events that have impacted how the United States operates politically. It's the perfect reference tool for students and history buffs alike!