is a website which provides access to a large bibliographic database of scientific and medical publications of the Dutch publisher Elsevier
. It hosts over 18 million pieces of content from more than 4,000 academic journals
and 30,000 e-books of this publisher. The access to the full-text requires subscription, while the bibliographic metadata is free to read. ScienceDirect is operated by the British-Dutch publisher Elsevier. It was launched in March 1997.