Business class (also known as executive class or upper class) is a high quality second-tier travel class available on some commercial airlines and rail lines. Its level of accommodation is higher than economy class and domestic first class but lower than international first class. However, many airlines offer only business class as the highest level of international service.
- Perry Garfinkel (2008-03-10). "On some airlines, business class goes first". The International Herald Tribune. http://www.iht.com/articles/2008/03/10/business/seats.php. Retrieved 2008-03-11.