CEians unfortunately I strongly disagree with all of you, there seem a big confusion. If we view from the course perspective we won't be able to find any difference or rather i'll say that subtleness will be seen.
OK now lemme keep it straight
Computer Science is a field of science which deals with theory and foundation of information and computations and their application in computer fields, a very good example is Computer Graphics
on the other hand Information Technology and the name suggests is more related to PROCESSING and MANAGING of information in an environment. That's y we'll never come to here CS companies, rather we say IT companies
I guess that makes it pretty clear