The National Institute of Open Schooling (NIOS in Palam

- NIOS formally known as NATIONAL INSTIUTE OF OPEN SCHOOLING OR DELHI OPEN SCHOOL OR DELHI OPEN is central Govt Board, at starting time it was the part of CBSC but in 1989 it was make a autonomous Govt Board by Ministry of Human Resource Under the NATIONAL EDUCATION POLCY 1986. So it is a valid board and accepted in all over word.