PRINTED MATERIALS, NAMELY, BOOKS, MAGAZINES, NEWSLETTERS, JOURNALS, PAMPHLETS AND BROCHURES IN THE FIELD OF COMPUTER HARDWARE AND SOFTWARE FOR THE DEVELOPMENT, MAINTENANCE AND USE OF LOCAL AND WIDE AREA COMPUTER NETWORKS; COMPUTER SOFTWARE AND HARDWARE OPERATING MANUALS IN THE FIELD OF COMPUTER HARDWARE AND SOFTWARE FOR THE DEVELOPMENT, MAINTENANCE AND USE OF LOCAL AND WIDE AREA COMPUTER NETWORKS