1854-1896 - several companies
1890-1899 - horse cars replaced with electric streetcars
1886-1894 - operated steam dummy
1896-1923 - Brooklyn Rapid Transit Co.
1919 - buses introduced by first of several companies, subsequently acquired by Brooklyn Manhattan Transit Corp.
1929 - buses introduced by Brooklyn Manhattan Transit Corp.
1923-1940 - Brooklyn Manhattan Transit Corp.
1940-1953 - New York City Board Of Transportation
1953-present - New York City Transit Authority
1956 - streetcars discontinued
1930-1960 - operated trolleybuses
CURRENT TRANSIT SYSTEM (SINCE 1968)
Metropolitan Transportation Authority