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International Speedway Corporation (ISC) a publicly-traded company is a leading promoter of motorsports activities in the United States.

In addition to motorsports facilities, ISC also owns and operates MRN Radio, the nation's largest independent sports radio network; Daytona 500 Experience, the "Ultimate Motorsports Attraction" in Daytona Beach, Florida and the official attraction of NASCAR; Americrown Service Corporation, a provider of catering services, food and beverage concessions, and merchandise sales; and Motorsports International, a producer and marketer of motorsports-related merchandise.

 
 
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