Accountability Controlled by journalistic ethics. May be fact-checkers employed by magazine. Controlled by journalistic and professional ethics. Controlled by peer-review process. Generally includes many ads for products which appeal to a fairly broad audience.
Covers often picture news item.
Fairly heavily illustrated. Includes ads for products of interest only to people in that industry. Articles may include abstracts and short bibliographies. Covers often plain, vary little issue to issue. Illustrations limited to those strictly necessary to elucidate article.