00000cam a22000004a 4500 UP-8027390931313649327 Buklod 20070912124538.0 m |o d | ta 031220s1990 xx |||| r |||| u| d 0029461723 (iLib)UPVIS-00000035510 HF5548.2 S77 1990 Stallings,William. Business data communications William Stallings. New York Macmillan Publishing Co. c1990. 796 p. Business Data processing. Business Communication systems Data processing. Local area networks(Computer network) Local transmission systems. UPVIS UPV-CML HF5548.2 .S77 1990 Book