TY - BOOK AU - O.Brien,James A. TI - The nature of computers: with productivity software guides SN - 0155004891 (pbk.) AV - QA76.5 .O28 1993 U1 - 004 20 PY - 1993/// CY - Fort Worth PB - Dryden Press KW - Computers KW - Electronic data processing N1 - Includes bibliographical references and index ER -