Every article is indexed.
PCI currently indexes over 10.75 million articles in 3,142 journals. PCI's scope is world-wide and includes journals in English, German, Italian, French, Spanish and other Western languages. Full Text is a major online periodical archive which makes the full image of periodical articles in the humanities and social sciences, from 1770 to 1990, available in digital form. ProQuest 5000 includes bibliographic records of articles from more than 8192 periodical, half of included records also with full text. Through this services users can browse 485 scientific journals in biology, chemistry, medicine, computer science, physics, mathematics, law and economics.