Subway (stylized as SUBWAY) is an American fast food restaurant franchise that primarily sells submarine sandwiches (subs) and salads. It is owned and operated by Doctor's Associates Inc. Subway is one of the fastest growing franchises in the world, with 44,603 restaurants in 111 countries and territories as of January 19, 2016. USA alone has 27,058 outlets. It is the largest single-brand restaurant chain and the largest restaurant operator in the world.