Within the United States, most colleges and universities operate on a two regular semester academic year. This does not include interim and/or summer semesters. In general, the Bachelor's degree runs anywhere from 124 to 128 credits of course work. This would equate to four years of study provided the student follows through with the prescribed program layout provided by the school. Colleges and universities outside the United States may have a variety of methods that vary in time and credit requirements. That being said, I would recommend that you contact the University of Toronto for accurate feedback particular to a computer science degree. In addition go to their official web site where you can look at their programs of study and requirements.
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