Historical Perspectives on Supervision Timeline

Events

Approx. 1600 - Approx. 1800
Approx. 1800 - Approx. 1850
Approx. 1850 - Approx. 1900
Approx. 1900
Approx. 1920
Approx. 1930 - Approx. 1959
Approx. 1960 - Approx. 1970
Approx. 1970 - Approx. 1979
Approx. 1980 - Approx. 1990
Approx. 1990 - Approx. Present