The full form of SOF ISSO is the International Social Studies Olympiad.
SOF ISSO is a prestigious annual competition for high school students from around the world who are interested in Social Studies. Participants compete in a series of challenging problems that test their aptitude of Social Studies. The competition aims to test the proficiency of the students in terms of their awareness on History, Geography, Political Science, and Economics.
Schools in India, Bangladesh, Bhutan & Nepal have to pay SOF a registration fee of INR 125 and for other countries, it is USD 9 (including GST) per student / Olympiad towards the cost of the examination.