Classification is the process of grouping together people or things that are alike in some way. A simple classification would be to classify cars in terms of their body size: full-size, mid- size, compacts, and sub-compacts, or Delgado Community College in terms of its different campuses. These groups or categories, are helpful in letting you see relationships among people or objects. They help you to organize information and compare it.
However, these categories often do not exist in the real world; they may exist only in your mind. You create them using some criterion or organizing principle. For example, you can classify college students by looking at their study habits: those who schedule study time, those who cram before a test, and those who hardly study at all. The organizing principle for classifying students in the example above is the different ways that they study. On the other hand, you could just as easily have classified students according to their age, their grade point average, or their religion. You could just as easily have classified cars according to their cost, their gas mileage, or their body style