Tamil Nadu State Transport Corporation transport corporation in India also biggest corporation in the world after bifurcation of APSRTC. TNSTC operates buses of various classes to cater to different sections of public: TNSTC and SETC use custom made buses built on Ashok Leyland and TATA supplied chassis. Air conditioned buses for intra city routes in Chennai are supplied by Volvo. All divisions have individual own coach building units. In 1984, Tamil Nadu State Transport Corporation Limited established Institute of Road and Transport Technology at Chithode, Erode and IRT Perundurai Medical College at Perundurai near Erode. In 2013, Tamil Nadu State Transport Corporation Limited established Amma
State Industries Promotion Corporation of Tamil Nadu and Manapparai soon. SIPCOT IT Park is the largest Information Technology Park in Asia, located in Padur, Siruseri, along the IT Corridor, Chengalpattu taluk, Kancheepuram District. State Industries Promotion Corporation of Tamil Nadu The State Industries Promotion Corporation of Tamil Nadu Limited (SIPCOT) (), Limited is an institution owned by the Government of Tamil Nadu. The State Industries Promotion Corporation of Tamil Nadu Limited (SIPCOT) was formed in the year 1971, to promote industrial growth in the State and to advance term loans to medium and large industries The Functions of State Industries Promotion Corporation of Tamil Nadu Limited (SIPCOT)