International Speedway Corporation (ISC) is a corporation

Corporation

A corporation is created under the laws of a state as a separate legal entity that has privileges and liabilities that are distinct from those of its members. There are many different forms of corporations, most of which are used to conduct business. Early corporations were established by charter...

 whose primary business is the ownership and management of NASCAR

NASCAR

The National Association for Stock Car Auto Racing is a family-owned and -operated business venture that sanctions and governs multiple auto racing sports events. It was founded by Bill France Sr. in 1947–48. As of 2009, the CEO for the company is Brian France, grandson of the late Bill France Sr...

 race tracks. ISC was founded by NASCAR founder Bill France, Sr. in 1953 for the construction of Daytona International Speedway

Daytona International Speedway

Daytona International Speedway is a race track in Daytona Beach, Florida, United States. Since opening in 1959, it has been the home of the Daytona 500, one of the most prestigious races in NASCAR. In addition to NASCAR, the track also hosts races of ARCA, AMA Superbike, Grand-Am and Motocross...

 and in 1999 they merged with Penske Motorsports to become one of the largest motorsports companies in North America. The company has played an important, though controversial, role in the modernization of the sport.