The Indian Civil Service forms the backbone of the Indian government machinery & constitutes all the major departments which run the state & central administration. The three types of services recruited through the Civil Services Examination are All India Services, Central Services, and State Services. To know more about the complete list of services and their posts and pay scale check the CS List of Services. The Civil Services examination is one of the most prestigious examinations conducted by UPSC which is called as Union Public service Commission. Historically it has been of the most sought after career by young and talented individuals. It has not lost its prestige value amidst the recent popularity of IT and management careers. Civil Services is also popularly known as the IAS exam or the UPSC exam and is considered one the toughest competitive exams in the world with success rate of just 0.1%.