Oh, OH or Oh! is an interjection, proclaiming surprise (emotion). It may refer to:
Ohio (listen) is a Midwestern state in the Great Lakes region of the United States. Of the fifty states, it is the 34th largest by area, the seventh most populous, and the tenth most densely populated.
The Ohio State University (OSU), commonly referred to as Ohio State, is a large public research university in Columbus, Ohio.
Ohio University (OU or Ohio) is a public research university in Athens, Ohio. The first university chartered by an Act of Congress and the first to be chartered in Ohio, it was chartered in 1787 by the Congress of the Confederation and subsequently approved for the territory in 1802 and state in 1804, opening for students in 1809. Ohio University is the oldest university in Ohio, the eighth oldest public university in the United States and the 30th oldest among public and private universities.
The Ohio River is a 981-mile (1,579 km) long river in the midwestern United States that flows southwesterly from western Pennsylvania south of Lake Erie to its mouth on the Mississippi River at the southern tip of Illinois.
Ohm's law states that the current through a conductor between two points is directly proportional to the voltage across the two points.
Ohio State Buckeyes football team competes as part of the NCAA Division I Football Bowl Subdivision, representing Ohio State University in the East Division of the Big Ten Conference.
The Ohlone, formerly known as Costanoans (from Spanish costano meaning "coast dweller"), are a Native American people of the Northern California coast.