Elsevier is a global information and analytics company and one of the world's major providers of scientific, technical, and medical information that helps institutions and professionals progress science, advance healthcare and improve performance. It was established in 1880 as a publishing company. It is a part of the RELX Group, known until 2015 as Reed Elsevier. Its products include journals such as The Lancet and Cell, the ScienceDirect collection of electronic journals, the Trends and Current Opinion series of journals, the online citation database Scopus, and the ClinicalKey solution for clinicians. Elsevier's products and services include the entire academic research lifecycle, including software and data-management, instruction and assessment tools.
Elsevier publishes more than 430,000 articles annually in 2,500 journals. Its archives contain over 13 million documents and 30,000 e-books. Total yearly downloads amount to more than 900 million.
Elsevier's high net profit margins (37% in 2017) and its copyright practices have subjected it to criticism by researchers.