The Tamil Nadu Public Service Commission (TNPSC) was established in 1923 by the British to examine the salary structure of the Indian Civil Service. It was originally called the Madras Public Service Commission and was renamed to TNPSC in 1970 when the state's name changed. TNPSC is headed by a chairman and consists of 15 members appointed by the Governor of Tamil Nadu. It conducts recruitment exams and selects candidates for government jobs in Tamil Nadu in groups like Group 1, 2, 3 and 4. The document provides details on eligibility criteria like educational qualifications, age limits, exam pattern for various TNPSC jobs.