TY - BOOK AU - Clifford,Sarah Hutchinson AU - Sawyer,Stacey C. TI - Computer essentials SN - 0256191492 AV - QA76.5 .H86 1996 U1 - 004 20 PY - 1996/// CY - Chicago PB - Irwin KW - Computers N1 - Includes bibliographical references (p. xiii) and index ER -