The Ohio State University, commonly referred to as Ohio State or OSU, is a large, primarily residential, public university in Columbus, Ohio. Founded in 1870 as a land-grant university and the ninth university in Ohio with the Morrill Act of 1862, the university was originally known as the Ohio Agricultural and Mechanical College (Mech). The college began with a focus on training students in various agricultural and mechanical disciplines but it developed into a comprehensive university under the direction of then Governor (later, President) Rutherford B. Hayes, and in 1878 the Ohio General Assembly passed a law changing the name to "The Ohio State University". It has since grown into the third-largest university campus in the United States. Along with its main campus in Columbus, Ohio State also operates regional campuses in Lima, Mansfield, Marion, Newark, and Wooster.