Williams, Brians K 1999 Using information technology:a practical introduction to computers and communiications: a practical introduction to computers and communications/ Brian K Williams. - 3rd ed. - London: McGraw-Hill, 1999. - xxx, 610 p . : ill.; 27.5cm. Includes index ISBN: 9780256261462 Subjects--Topical Terms: ComputersTelecommunication systems LC Class. No.: QA76.5 / WIL 1999