The subject "physics" can be divided into experimental and theoretical physics. In order to become excellent physicists, students attend numerous classes on these two subcategories of physics. The neverending "battle" between theoretical and experimental physicists on which group of people are the "real" physicists is being fought on (presumably) each and every university campus in this world.
But does the simple division into two categories, theory and experiment, do justice to this large and complex subject termed physics? Not really. How about computational physics?