By O'Leary, Timothy J.,. Redwood City, Calif. ; Wokingham : Benjamin/Cummings, 1989 . xxix, 687 p. : , First ed. published as: Computers and information processing. c1985 | Includes index 27 cm. 0805369422
]]>By O'Leary, Timothy J.,. Boston : McGraw Hill Technology Education, 2005 . 509 p. : , Includes index. 28 cm. +. 0072836075
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