International Linguistics Olympiad North American Computational Linguistics Olympiad 加拿大滑铁卢Canadian Computing Competition 加拿大滑铁卢计算机竞赛Beaver Computing Competition 美国USA Computing Olympiad
1). Canadian Computing Competition
(Also the website for the Canadian Informatics Olympiad program)
< http://cemc.uwaterloo.ca/ccc >
2). USA Computing Olympiad
< www.usaco.org >