According to the Railways, the idea came to minister Suresh Prabhu when a passenger, Avtar Krishen Kher, sent back a cheque in the name of IRCTC for the differential amount of the actual fare and the subsidy, which was around Rs 950 for his trip

Youth from the state will travel to happening places (Education-wise) such as Hyderabad and Bengaluru to explore opportunities”, said IRCTC group general manager, East Zone, Debashis Chandra in a media interaction at an event in Kolkata

How PNR helps ? with the help of PNR you get  an individual identity of your booking info and  with the help of this identity, your booking status and information regarding it can be accessed using website of IRCTC

Coach code is the short form or the code form of the coach that you have booked or you can book on the Irctc site, you can use your PNR number to check your  PNR status and with the  help of below table you can have knowledge about the coach that you are booking.