Another reason is that the University of Waterloo has the only mathematics school in Canada and even North America. Its mathematics and computer can be said to be the best in North America. Blackberry, Google and Microsoft all have branches near the University of Waterloo, and many students who graduated from the University of Waterloo can enter these companies. Bill Gates, the former CEO of Microsoft, said in a speech at the University of Waterloo that among the graduates recruited by Microsoft every year, the proportion from the University of Waterloo is the highest. Lazaridis, one of the founders of BlackBerry, graduated from the University of Waterloo.