An official site describing the history of the contest, official regulations, future locations and members in many countries of the world.

Annual computing-science competition for talented senior high-school students. Contains links to the homepages for every year and status information about the organisation of the event.

Training pages for C++/Pascal programmers who intend to particapate at IOI.

ACSL organizes computer science contests and computer programming contests for junior and senior high school students.

Annual programming competition for pre-university students in England, Scotland and Wales.

A high school programming contest for students in the Washington DC area.

An annual computer programming competition held at Dublin City University, sponsored by DCU and IBM Ireland, for pre-university programmers.

USACO supports pre-college computing around the world through computer programming competitions and training materials. Site contains details about current and previous competitions, alumni, training, and registration.

12th International Olympiad In Informatics in Bejing.

14th International Olympiad in Informatics.