The Fédération Internationale de l'Automobile (FIA, English: International Automobile Federation) is an association established as the Association Internationale des Automobile Clubs Reconnus (AIACR, English: 'International Association of Recognized Automobile Clubs') on 20 June 1904 to represent the interests of motoring organisations and motor car users.
The Group 4 racing class referred to regulations for cars in sportscar racing, GT racing and rallying, as regulated by the FIA.
Group 5 was an FIA motor racing classification which was applied to four distinct categories during the years 1966 to 1982.
Group C was a category of motorsport, introduced by the FIA in 1982 for sports car racing, along with Group A for touring cars and Group B for GTs.
János L. Wimpffen (born 1950s, Graz, Austria) is an American motorsport historian and writer of Austro-Hungarian origin who specialises in sportscar racing; he is best known for his 1999 debut book Time and Two Seats, which won multiple awards.
The World Sportscar Championship was the world series run for sports car racing by the FIA from 1953 to 1992.
The 24 Hours of Le Mans (24 Heures du Mans) is the world's oldest active sports car race in endurance racing, held annually since near the town of Le Mans, France.