CCC also stands for the Canadian Computing Competition. A cross Canada computer programming contest run out of Waterloo. This contest is actual real fun and if you do extremely well you have a chance to go on the IOI team for Canada.
More Info? go to there web site: http://www.math.uwaterloo.ca/~ccc/
Just on a personal note. This year I did very well in CCC, in a few days I and 16 other people from a cross Canada are going to Waterloo to do the second stage of the contest. If I get in the top 4, I get to be on the IOI team for Canada, and go to Finland for the next competition.
Update: I ended up geting a bronze metal. But I'm not going to Finland :(.