16 paper cardboard, cardboard articles, namely, boxes, dividers for boxes, tubes; filing trays; stamp dispensers; packaging materials, namely, paper bags, boxes, mailing tubes, plain wrapper paper, fillers, and envelopes; printed matter, namely, special handling forms, pricing lists, instruction sheets in the use of postal services; printed postcards and greeting cards; printed tickets, blank and printed labels; philatelic products, namely, stamps, collection books, stamp mounting materials; stationery; office requisites, namely, stamp dispensers, blank address books, blank address cards and card files, and writing paper; postal money orders; postal special handling orders; maps; blank paper and paper cards for the recordal of computer programs and data; printed instructional and teaching materials in the fields of packaging, addressing and delivery options for goods and correspondence and for stamp collecting