16 Periodical publications relating to communication networks; instruction manuals related to the operation of communication networks; computer manuals related to the operation of communication networks; printed publications, namely magazines, pamphlets and newsletters relating to computers, computer systems, computer related goods and computer related services in the field of communication networks; printed matter, namely magazines, pamphlets and newsletters featuring information about communication networks; books related to communication networks; computer printouts, relating to communication networks; computer operating and user manuals; instruction and teaching materials in the field of communication networks