Aircraft Communications Addressing and Reporting System () data is used to send messages to and from commercial airlines' aircraft. A good explanation can be found here. The frequencies used in the United States for ACARS are:
About the Ohio Expo Center. In 1886, what is now known as the Ohio Expo Center became the permanent home of the Ohio State Fair. Years of planning and the acquisition of more than 100 acres of beautiful land adjacent to a major railroad intersection in Columbus culminated on August 30, 1886 when the 37th Ohio State Fair opened its gates.
The Ohio State Fair is one of the largest state fairs in the United States. In 2015, attendance was 982,305, the fair's highest 12-day attendance on record. The event is held in Columbus, Ohio in late July/early August. As estimated in a 2011 economic impact study conducted by Saperstein & Associates, the state fair contributes approximately 68.5 million dollars to the state's economy.