Slack publishes medical and health care textbooks. It is comprised of several business units that include periodicals, journals and newspapers in an array of specialties within medicine, nursing and allied health. Slack also publishes professional books and a full line of health care books in the areas of ophthalmology, occupational therapy, physical therapy, athletic training and gastroenterology; consumer books, including titles by the late best-selling author, Leo Buscaglia, PhD.; Internet, hosting a full line of online educational products in many specialty areas. Slack also provides meeting services, full meeting management with CME capabilities that offer needs assessment, content development, site planning, registration, food and beverage service and travel arrangements and exhibit sales and management.