Periodicals include popular magazines, professional journals, newspapers and other works published on a regular and continuous basis, usually more than once per year. Cochise College Libraries have over 300 periodicals, some on microfilm. Periodicals are for use in the library. A periodical is a popular magazine, professional journal, newspaper or other publication published on a regular basis, usually more than once a year. A periodical article often contains the most current information available. Cochise College Libraries subscribe to over 300 different periodicals ranging from SCIENTIFIC AMERICAN to the WALL STREET JOURNAL. Subscriptions generally include periodicals which in some way support the curriculum of Cochise College.