Ontario Nurses' Association was created in 1973.
Ontario Soccer Association was created in 1901.
Ontario Hospital Association was created in 1924.
Ontario Medical Association was created in 1880.
Ontario Dental Association was created in 1867.
Ontario Association of Career Colleges was created in 1973.
Ontario Association of Food Banks was created in 1992.
Ontario Sustainable Energy Association was created in 2001.
Ontario Co-operative Association was created in 2002.
School Library Association was created in 1937.
Library Association of Bangladesh was created in 1956.
American Library Association was created in 1876.