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 ninth university in Ohio with the Morrill Act of 1862, the university was originally known as the Ohio Agricultural and Mechanical College. 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 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.