Later on, as the Government of Pakistan approved the revamping of the Water and Power Development Authority (WAPDA) power sector in April 1998, the Hyderabad Electric Supply Company took over responsibilities of the Hyderabad Area Electricity Board.

Hyderabad Electric Supply Company is owned and operated by WAPDA though.

Under 8 DISCOs, Area Electricity Board (AEB) Hyderabad was one of them.

Therefore, HESCO - Hyderabad Electric Supply Company came in to formation.

You can help Wikipedia by expanding it.This article about a company or corporation involved in the energy industry is a stub.