Tamil Nadu had a bicameral legislature until 1986, when it was replaced with a unicameral legislature, like most other states in India.
The 'Governor' is the Constitutional head of the state while the 'Chief minister' is the head of the government and the head of the council of ministers. The Chief-Justice of the Chennai high-court is the head of the judiciary. The present Governor, Chief-minister and the Chief-Justice are S. S. Barnala, J.Jayalalitha and A. P. Shah respectively. The major administrative units of the state constitutes 39 Lok Sabha constituencies, 234 Assembly constituencies, 31 districts One more in the making, 10 municipal corporations, 149 municipalities, 561 town panchayats and 12,618 village panchayats.
Tamil Nadu has been a pioneering state in E-Governance initiatives in India. A large part of the government records like land ownership records are already digitised and all major offices of the state government like Urban Local Bodies All the Corporations and Municipal Office activities - revenue collection etc, land registration offices, and transport offices have been computerised, thereby improving the quality of service and transparency in operations.
The 2006 elections were won by Dravida Munnetra Kazhagam, which since it had defeated Indian National Congress in 1969 under C. N. Annadurai has governed Tamil Nadu intermittently, competing with All India Anna Dravida Munnetra Kazhagam.
The 2011 elections were won by All India Anna Dravida Munnetra Kazhagam, which since it had defeated, competing with Dravida Munnetra Kazhagam.
Here is the Press Release information about the Goverment of Tamilnadu.
Chief Minister's Public Relief Fund