Voltage has a meaning of a gain while voltage drop - of a loss; voltage is an earned voltage while voltage drop is a lost voltage. If we consider the voltage across an element, voltage means its own voltage (created by the element) while voltage drop means some else's voltage (created by an external source). So, in the first case, the element is active (a source) while in the second case, the element is passive (resistor, capacitor, inductor or something else).
Jackson County is a county located in the U.S. state of Michigan. Its population was 160,248 as of the 2010 Census. The county seat is Jackson. The county was set off in 1829 and organized in 1832. It is named for U.S. President Andrew Jackson and considered to be one of Michigan's  Cabinet counties , named for members of Jackson's Cabinet.
Jackson is a city located along Interstate 94 in the south central area of the U.S. state of Michigan, about 40 miles (64 km) west of Ann Arbor and 35 miles (56 km) south of Lansing. It is the county seat of Jackson County. As of the 2010 census, the city population was 33,534. It is the principal city of the Jackson Metropolitan Statistical Area, which includes Jackson County and has a population of 160,248. It was founded in 1829, and named after President Andrew Jackson. According to the United States Census Bureau, the city has a total area of 11.1 square miles (28.7 km2), all of it land.