what is nosb booking in irctc

NOSB stands for "No Seat Berth" and is a feature introduced by the Indian Railway Catering and Tourism Corporation (IRCTC) . It is related to child fares and is applicable when a ticket is booked for a child under the age of 11 and the fare paid is half of the adult fare. If NOSB is mentioned on the ticket, it means that the child is not entitled to a seat or berth and will have to travel without one. If a seat or berth is required, the full adult fare must be paid for the child. NOSB booking in IRCTC does not refer to making a reservation at a hotel or other accommodation, as mentioned in one of the search results.