Robert SchultheisDr. Robert A. Schultheis has been a high school teacher, a university teacher educator, and a univeristy management information systems faculty member specializing in networking. He is the coauthor of textbooks in both high school business education nd college-level information systems. He has retired from Southern Illinois University at Edwardsville but continues to write, consult organizations on information system matters, and maintain web sites for organizations. Read More Read Less