00498nam a22001577a 4500 1903112214 (pbk) 004 HEA Heathcote, P.M A' level computing Christchurch Street Payne-gallway Publisher 2000 xii, 385 p. : ill. ; 27 cm. Includes index. Computer science Disk storage Program design Communication methods Wide area network Pascal IIDC RIPS RISE BK 16753 16753