TY - BOOK AU - Sawyer, Stacey C AU - Clifford, Sarah Hutchinson AU - Williams, Brian K TI - Using information technology : a practical introduction to computers & communications. brief version SN - 9780072255676 SN - 98021696 U1 - 004 SAW PY - 1999/// CY - Boston PB - Irwin/McGraw-Hill KW - Computers KW - Information technology KW - Telecommunication systems N1 - Includes bibliographical references (p. 335-336) and index ER -