Current Contents was first published in paper format, in a single edition devoted only to biology and medicine. Other subject editions were added later.
At first it consisted simply of a reproduction of the title pages from several hundred major peer-reviewed scientific journals, and was published weekly, with the issues containing title pages from journal issues only a few weeks previously, a shorter time lag than any service then available. There was an author index and a crude keyword subject index only. Author addresses were provided so readers could send reprint requests for copies of the actual articles.
Still published in print, it is presently available as one of the databases included in Thomson's ISI Web of Knowledge with daily updates, and also through other database aggregators.