<Table> National Collegiate Athletic Association <Tr> <Td_colspan="2"> </Td> </Tr> <Tr> <Th> Abbreviation </Th> <Td> NCAA </Td> </Tr> <Tr> <Th> Founded </Th> <Td> March 31, 1906 (1906 - 03 - 31) (IAAUS) 1910 (NCAA) </Td> </Tr> <Tr> <Th> Legal status </Th> <Td> Association </Td> </Tr> <Tr> <Th> Headquarters </Th> <Td> Indianapolis, Indiana </Td> </Tr> <Tr> <Th> Region served </Th> <Td> United States and Canada </Td> </Tr> <Tr> <Th> Membership </Th> <Td> 1,281 schools / institutions, conferences, or other associations </Td> </Tr> <Tr> <Th> President </Th> <Td> Mark Emmert </Td> </Tr> <Tr> <Th> Main organ </Th> <Td> Board of Governors </Td> </Tr> <Tr> <Th> Website </Th> <Td> NCAA official website NCAA administrative website </Td> </Tr> </Table> <Tr> <Th> Abbreviation </Th> <Td> NCAA </Td> </Tr>

Where is the main office of the ncaa