Tamil Nadu has scientific and social infrastructure.

Tamil Nadu is a front-runner among the States in India in ICT enabled Governance.

Information Technology Department will attempt to
Bridge the digital rural-urban divide
Substantially increase the software exports of Tamil Nadu
Take Computing in Tamil to a higher level
Enhance the quality of life of Citizens through Information and Communication Technology.
Make Tamil Nadu the Best in IT enabled Governance
Provide Cable TV services to all households in Tamil Nadu at reasonable rates, at the earliest
Provide Government services, both informational and transactional, to Citizens at their door steps through the internet at the earliest

As you are looking for list of Undertaking/Autonomous Bodies under Department of Information Technology of Tamil Nadu, so here are following details:

Undertaking/Autonomous Bodies
Biodiversity Conservation And Greening Society
Agricultural Marketing Board
Madras Institute of Technology, Anna University
Office of the Aavin, Bulk Milk Vending / Sachet Supply Unit
Water Supply and Drainage Board (TWAD)
Labour Welfare Board
Metropolitan Transport Corporation (Chennai Division) Ltd
Handloom Development Corporation
Industrial Development Corporation (TIDCO)
State Industries Promotion Corporation (SIPCOT)
Tamil Nadu State Marketing Corporation Ltd (TASMAC)
Industrial Investment Corporation (TIIC)
Cooperation Food and Consumer Protection
Aavin (Tamil Nadu Cooperative Milk Producers' Federation)
Poompuhar Shipping
Tamil Nadu Electricity Regulatory Commission (TERC)
Consumers' Co-operative Federation
Tamil Nadu Pollution Control Board
Southern Structurals
Women Development Corporation Limited
Chennai Metropolitan Development Authority (CMDA)
Livestock Development Agency
Ex-Servicemen's Corporation (TEXCO)
Energy Development Agency (TEDA)
Tamil Nadu Urban Finance and Infrastructure Development Corporation
Tamil Nadu Tourism Development Corporation Ltd. (TTDC)
Cooperation Food and Consumer Protection
Tamil Nadu Industrial Explosives
District Environmental Laboratory,Tamil Nadu
Medical Services Corporation (TNMSC)
Overseas Manpower Corporation
District Environmental Engineer's Office, Chennai
Aavin Corporate Office
Fisheries Development Corporation
Co-optex
Co-operative Housing Federation
University of Madras
Anna Institute of Management
Corporation of Chennai
State Commissioner for Protection of Child Rights SCPCR
Tamil Nadu Transmission Corporation Ltd (TANTRANSCO)
Tamil Nadu Water Supply and Drainage Board (TWAD)
Wakf Board
Advisory Board COFEPOSA
Small Industries Corporation (TANSI)
Minorities Economic Development Corporation Ltd
Folk Artists Welfare Board
Tamil Nadu Transport Development Finance Corporation Ltd
Tamil University
Co-operative Milk Producers' Federation
Anna University
Tamil Nadu Traders Welfare Board
Tamil Nadu Physical Education and Sports University
Madurai Kamaraj University
Tamil Nadu Ex-Servicemen's Corporation (TEXCO)
Chennai Metro Water Supply & Sewerage Board (CMWS&SB)
State Express Transport Corporation Ltd
Maritime Board
Power Finance and Infrastructure Development Corporation Ltd.
Civil Supplies Corporation
State Council For Technical Education
State Palmgur and Fibre Marketing Co-operative Federation
Tamil Nadu Small Industries Technology Mission
Backward Classes Economic Development Corporation
Handicrafts Development Corporation
Advisory Board NSA
Tamil Nadu Minerals Ltd (TAMIN)
Periyar University
Mother Teresa Women's University
Khadi and Village Industries Board
District Environmental Engineer's Office, Kanchipuram District at Tambaram
Dr Ambedkar Law University
Bharathidasan University
Science City
Tamil Nadu State Wide Area Network TNSWAN
Leather Development Corporation
Graphite Limited
Dr. MGR Medical University
Forest Plantation Corporation Ltd (TAFCORN)
Co-operative State Agriculture and Rural Development Bank Limited
Police Housing Corporation Ltd
Slum Clearance Board
Film Development Corporation Ltd
Tamil Nadu Open University (TNOU)
Tea Plantation Corporation (TANTEA)
Tamil Nadu Textile Corporation
Vanniyar Public Property Welfare Board
Manonmaniam Sundaranar University
Social Welfare Board
Corporation for Development of Women
Electronics Corporation of Tamilnadu Ltd (ELCOT)
Horticultural Producers Co-operative Enterprises Ltd (TANHOPE)
Tamil Nadu Road Infrastructure Development Corporation
State Legal Services Authority
State Commission for Women
Co-operative Union
State Water Resources Management Agency SWaRMA
Pallavan Transport Consultancy Services Ltd. (PTCS)
Manual Workers Welfare Board
State Council for Higher Education
New Tirupur Area Development Corporation Ltd
Cements Corporation
Construction Workers Welfare Board
State Apex Fisheries Co-operative Federation Ltd
Medicinal Plant Farms and Herbal Medicine Corporation Ltd (TAMPCOL)
State Health Society
Hajj Commiitee
Institute of Road Transport
Poultry Development Corporation (TAPCO)
Tamil Virtual Academy
Veterinary and Animal Sciences University
Industrial Guidance and Export Promotion Bureau (GUIDANCE)
Small Industries Development Corporation (TANSIDCO)
Text Book Corporation
Tamil Nadu eGovernace Agency
Agricultural University
Market Management Committee
Joint Chief Environmental Engineer's Office
Anna University Tiruchirappalli
Tamil Nadu Civil Supplies Corporation
Co-operative Marketing Federation
Tamil Nadu Housing Board
Tamil Nadu Adi Dravidar Housing and Development Corporation Limited(TAHDCO)
Warehousing Corporation
Bharathiar University
Arasu Rubber Corporation Ltd
Handloom Weavers' Co-operative Society (Co-optex)
Salt Corporation
Electricity Board (TNEB)
Palm Products Development Board
Tamil Nadu Urban Infrastrcuture Financial Services Ltd. (TNUIFSL)
Newsprint and Papers Limited (TNPL)
Sugar Corporation
Co-operative Spinning Mill Federation Ltd (TANSPIN)
Lamwarm project
Tamil Nadu Watershed Development Agency
State Apex Co-operative Bank
Arasu Cable TV Corporation Ltd
Road Development Company Limited (TNRDC)
Co-operative Sugar Federation
Thiruvalluar University
State Blindness Control Society

Contact Details
Department of Information Technology
Secretary to Government
T.K. Ramachandran IAS ( Principal Secretary to Government )
Phone: 25670783
Email: secyit.tn@nic.in