This issue has been dealt with in each and every MIS text. The reason is that this issue is important from a conceptual standpoint in the study of MIS. The concepts of 'Data', 'Information' and 'Knowledge' are interlinked. In fact, data, information, knowledge and wisdom have been the building blocks of systems thinking and are sometimes referred in literature as DIK hierarchy. Data is raw facts, which is not of much use per se. When this data is processed it becomes information.