The districts of the Sri Lanka are divided into administrative subunits known as divisional secretariats. These were originally based on the feudal counties, the korales and ratas. They were formerly known as 'D.R.O. Divisions' after the 'Divisional Revenue Officer'. Later the D.R.O.s became 'Assistant Government Agents' and the Divisions were known as 'A.G.A. Divisions'. Currently, the divisions are administered by a 'Divisional Secretary', and are known as a 'D.S. Divisions'.