The International Mathematical Olympiad (IMO) is the World Championship Mathematics Competition for High School students and is held annually in a different country. The first IMO was held in 1959 in Romania, with 7 countries participating. It has gradually expanded to over 90 countries from 5 continents.
The International Physics Olympiad (IPhO) is an annual physics competition for high school students. It is one of the international science olympiads. The first IPhO was held in Warsaw, Poland in 1967.
The International Chemistry Olympiad (IChO) has been conducted since 1968, and is a competition for students at the secondary and higher secondary school levels. The IChO helps develop friendly relations between the young people from different countries, and thus encourages co-operation and international understanding. India started participating in this event from the year 1999 at the 31st IChO held at Bangkok, Thailand. India hosted the 33rd International Chemistry Olympiad (IChO) in its third year of participation in 2001 with the whole-hearted support of all countries.
