Abstract
First, look for a useful definition of information among different authors, then ask about the importance of information systems in management sciences, and then generate an appropriate definition to those management sciences. Finally, provide suitable models not only ata human being leve but also atan organizational level, in order to develop information systems, and write so me conclusions about the usefulness of those models at the public accounting professional level, at the management professional thinking level and also with the members of the organizations.