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Indian Railways is headed by a seven-member Railway Board whose chairman reports to the Ministry of Railways. Railway Board also acts as the Ministry of Railways. The officers manning the office of Railway Board are mostly from organised Group A Railway Services and Railway Board Secretariat Service. IR is divided into 18 zones, headed by general managers who report to the Railway Board.. A new wagon numbering system was adopted in Indian Railways in 2003. Wagons are allocated 11 digits, making it easy for identification and computerization of a wagon's information. The first two digits indicate Type of Wagon, the third and fourth digits indicate Owning Railway, the fifth and sixth digits indicate Year of Manufacture, the seventh through tenth digits indicate Individual Wagon Number, and the last digit is a Check digit. IR's bulk requirement of wagons is met by wagon manufacturing units both in public and private sectors as well as other Public Sector Units under the administrative control of Ministry of Railways. Source from : wikipedia