Program guides, catalogs, [ catalogs featuring pre-recorded videocassettes; printed instructional and teaching material; and ] companion books to television programs, in the fields of science, [ medicine, ] nature, health, health care, business, finance, geography, travel, [ mathematics, ] humanities, history, social sciences, education, economics, [ computers and technology, news, public affairs, ] art and culture, [ home maintenance, ] sports, culinary arts, [ gardening, ] antiques, [ and how-to and vocational information ]