The NC State Wolfpack is the nickname of the athletic teams representing North Carolina State University. The Wolfpack competes at the National Collegiate Athletic Association Division I as a member of the Atlantic Coast Conference for all sports since the 1953–54 season. The athletic teams of the Wolfpack compete in 23 intercollegiate varsity sports. NC State is a founding member of the ACC and has won eight national championships: two NCAA championships, two AIAW championships, and four titles under other sanctioning bodies. Most NC State fans and athletes recognize the rivalry with the North Carolina Tar Heels as their biggest. The primary logo for NC State athletics is a red block ‘S’ with an inscribed ‘N’ and ‘C’. The block S has been in use since 1890 but has seen many alterations through the years. The color red was adopted from the state bird, the cardinal. It became the sole logo for all NC State athletic teams in 2000 and was modernized to its current design in 2006.