The MetroCard is the payment method for the New York City Subway rapid transit system; New York City Transit buses, including routes operated by Atlantic Express under contract to the Metropolitan Transportation Authority (MTA); MTA Bus, and Nassau Inter-County Express systems; the PATH subway system; the Roosevelt Island Tram; AirTrain JFK; and Westchester County's Bee-Line Bus System. It is a thin, plastic card on which the customer electronically loads fares. It was introduced to enhance the technology of the transit system and eliminate the burden of carrying and collecting tokens. The MTA discontinued the use of tokens in the subway on May 3, 2003, and on buses on December 31, 2003. The MetroCard is managed by a division of the MTA known as MetroCard Operations and manufactured by Cubic Transportation Systems, Inc.