GARY B SHELLY; THOMAS J CASHMAN; JUDY A SERWATKA BUSINESS DATA COMMUNICATIONS : INTRODUCTORY CONCEPTS AND TECHNIQUES - 4 - THOMSON / COURSE TECHNOLOGY 2007 - xv,I.20 ISBN: 9788131503324 Subjects--Topical Terms: BUSINESS COMMUNICATION THE TELEPHONE SYSTEM Dewey Class. No.: 658.0546 (MBA) / GAR