This page contains a representative list of major databases and search engines useful in an academic setting for finding and accessing articles in academic journals, repositories, archives, or other collections of scientific and other articles.

  • AGRIS : International Information System for the Agricultural Sciences and Technology

    Covers agriculture, forestry, animal husbandry, aquatic sciences and fisheries, human nutrition, extension literature from over 100 participating countries.
    Material includes unique grey literature such as unpublished scientific and technical reports, theses, conference papers, government publications, and more.

  • Analytical Sciences Digital Library (ASDL)

    The Analytical Sciences Digital Library, ASDL, collects, catalogs, links and publishes peer reviewed web-based discovery materials pertinent to innovations in curricular development and supporting technical resources in the analytical sciences.

  • Arnetminer: search and mining of academic social networks

    Provide comprehensive search and mining services for researcher social networks.
    focus on: (1) creating a semantic-based profile for each researcher by extracting information from the distributed Web; (2) integrating academic data (e.g., the bibliographic data and the researcher profiles) from multiple sources; (3) accurately searching the heterogeneous network; (4) analyzing and discovering interesting patterns from the built researcher social network.

  • arXiv:

    Open access to 870,425 e-prints in Physics, Mathematics, Computer Science, Quantitative Biology, Quantitative Finance and Statistics

  • SAO/NASA Astrophysics Data System

    The SAO/NASA Astrophysics Data System (ADS) is a Digital Library portal for researchers in Astronomy and Physics, operated by the Smithsonian Astrophysical Observatory (SAO) under a NASA grant. The ADS maintains three bibliographic databases containing more than 10.3 million records: Astronomy and Astrophysics, Physics, and arXiv e-prints.

  • CiteSeerX

    CiteSeerx is an evolving scientific literature digital library and search engine that has focused primarily on the literature in computer and information science. CiteSeerx aims to improve the dissemination of scientific literature and to provide improvements in functionality, usability, availability, cost, comprehensiveness, efficiency, and timeliness in the access of scientific and scholarly knowledge.

  • Cogprints

    Can electronic archive for self-archive papers in any area of Psychology, Neuroscience, and Linguistics, and many areas of Computer Science (e.g., artificial intelligence, robotics, vison, learning, speech, neural networks), Philosophy (e.g., mind, language, knowledge, science, logic), Biology (e.g., ethology, behavioral ecology, sociobiology, behaviour genetics, evolutionary theory), Medicine (e.g., Psychiatry, Neurology, human genetics, Imaging), Anthropology (e.g., primatology, cognitive ethnology, archeology, paleontology), as well as any other portions of the physical, social and mathematical sciences that are pertinent to the study of cognition.

  • The Collection of Computer Science Bibliographies

    This is a collection of bibliographies of scientific literature in computer science from various sources, covering most aspects of computer science. The bibliographies are updated weekly from their original locations such that you’ll always find the most recent versions here.

  • Directory of Open Access Journals

    As of January 2013, the database contains 8536 journals, with an average of four journals being added each day in 2012.The aim of DOAJ is to “increase the visibility and ease of use of open access scientific and scholarly journals thereby promoting their increased usage and impact.

  • The DBLP Computer Science Bibliography

    DBLP listed more than 2.1 million articles on computer science in November 2012. All important journals on computer science are tracked. Proceedings papers of many conferences are also tracked.

  • Google Scholar

    Google Scholar is a freely accessible web search engine that indexes the full text of scholarly literature across an array of publishing formats and disciplines.

  • GoPubMed

    GoPubMed, the first knowledge-based search engine for the life sciences industry.

    GoPubMed is a knowledge-based search engine for biomedical texts. The Gene Ontology (GO) and Medical Subject Headings (MeSH) serve as “Table of contents” in order to structure the millions of articles of the MEDLINE database.

  • Intute

    Serves students, teachers, and researchers in UK further education and higher education, offering a selection of around 300,000 academic websites which have been hand-picked and described by subject specialists.

  • MedlinePlus

    You can use MedlinePlus to learn about the latest treatments, look up information on a drug or supplement, find out the meanings of words, or view medical videos or illustrations. You can also get links to the latest medical research on your topic or find out about clinical trials on a disease or condition.

  • Mendeley

    Mendeley is a free reference manager and academic social network that can help you organize your research, collaborate with others online, and discover the latest research.

  • Microsoft Academic Search

    Provides many innovative ways to explore scientific papers, conferences, journals, and authors

  • The OAIster® database

    OAIster is a union catalog of millions of records representing open access resources that was built by harvesting from open access collections worldwide using the Open Archives Initiative Protocol for Metadata Harvesting (OAI-PMH). Today, OAIster includes more than 25 million records representing digital resources from more than 1,100 contributors.

  • OpenGrey

    System for Information on Grey Literature in Europe, is your open access to 700.000 bibliographical references of grey literature (paper) produced in Europe and allows you to export records and locate the documents.

    Examples of grey (gray) literature include technical or research reports, doctoral dissertations, some conference papers, some official publications, and other types of grey literature.

  • PhilPapers

    PhilPapers is a comprehensive index and bibliography of works in philosophy. In addition to indexing books and journal articles, we monitor open access archives and personal pages for articles by academic philosophers. We also accept articles directly from users, who can provide links or upload copies in our open access archive, the largest in philosophy.s

  • PubMed

    PubMed comprises more than 23 million citations for biomedical literature from MEDLINE, life science journals, and online books. Citations may include links to full-text content from PubMed Central and publisher web sites.

  • PubChem

    PubChem is a database of chemical molecules and their activities against biological assays.
    Millions of compound structures and descriptive datasets can be freely downloaded via FTP

  • Research Papers in Economics

    RePEc (Research Papers in Economics) is a collaborative effort of hundreds of volunteers in 78 countries to enhance the dissemination of research in Economics and related sciences. The heart of the project is a decentralized bibliographic database of working papers, journal articles, books, books chapters and software components, all maintained by volunteers.

  • SafetyLit

    SafetyLit provides abstracts of reports from researchers who work in the more than 30 professional disciplines relevant to preventing unintentional injuries, violence, and self-harm. Among these are anthropology, economics, education, engineering specialties, ergonomics and human factors, health and medicine, law and law enforcement, psychology, sociology, and other fields.

  • SciELO

    SciELO is a bibliographic database and a model for cooperative electronic publishing in developing countries originally from Brazil. It contains 985 scientific journals from different countries in free and universal access, full-text format.


    A gateway to government science information and research results. provides a search of over 45 scientific databases and 200 million pages of science information with just one query, and is a gateway to over 2000 scientific Websites.

  • Science Accelerator

    A gateway to results of DOE research and development and major R&D accomplishments of interest to DOE.

  • Scirus

    is the most comprehensive scientific research tool on the web. With over 575 million scientific items indexed at last count, it allows researchers to search for not only journal content but also scientists’ homepages, courseware, pre-print server material, patents and institutional repository and website information. Recently added: Cambridge University Press and Oxford University Press

  • SearchTeam

    Students search together collaboratively for scholarly articles and resources

  • Social Science Research Network

    Contains an abstracts database and an electronic paper collection, arranged by discipline.

  • VET-Bib

    European vocational education and training (VET) literature.

  • WorldWideScience

    WorldWideScience is a global science gateway composed of national and international scientific databases and portals. WorldWideScience accelerates scientific discovery and progress by providing one-stop searching of databases from around the world. Multilingual WorldWideScience provides real-time searching and translation of globally dispersed multilingual scientific literature.

  • Science Direct:

     one of the largest online collections of published scientific research in the world. It is operated by the publisher Elsevier and contains nearly 10 million articles from over 2500 journals and over 6,000 e-books, reference works, book series and handbooks issued by Elsevier. The articles are grouped in four main sections: Physical Sciences and Engineering, Life Sciences, Health Sciences, and Social Sciences and Humanities.

  • Asian Development Bank’s Evaluation Reports

     Provides a full Catalogue of Evaluation Reports comprising of the following: Technical Assistance Performance Evaluation Reports, Project/Program Performance Evaluation Reports, Special Evaluation Studies, Assessments of Development Impact, Impact Evaluation Studies, Sector Assistance Program Evaluations, Country Assistance Program Evaluations, and Annual Evaluation Reports.

  • BioMed Central  

    Committed to providing access to journals covering all areas of biology and medicine.

  • CERN Document Server  

    – CERN offers fulltext preprints, articles, books, journals, and other documents of interest to persons working in particle physics and its related areas.

  • Chan Robles Virtual Law Library

      – This website is known to be the "Home of the Philippine On-line Legal Resources." It "features on the world wide web its Comprehensive Electronic Library on Philippine Legal Resources."

  • Directory of Open Access Journals (DOAJ)  –

     Quality controlled scientific and scholarly journals covering all subjects and languages. 

  • Free Full text Journal in Chemistry  

    – Covers access to journals in chemistry, biochemistry and its related subjects. 

  • Free Medical Journals 

    – Promotes access to medical journals over the internet.

  • Highwire Press

     – Major source of free access to high impact, peer reviewed life sciences journals on the internet sponsored by Stanford University Libraries.

  • Johns Hopkins APL Technical Digest  

    – Published by the Johns Hopkins University – Applied Physics Laboratory, the journal focuses on "missile, radar, sonar, sensor, chemical biological, and information technologies; space science and engineering, microelectronics; communications; navigations; modeling and simulation; advanced research and technology development."

  • LawPhil

     – The legal website of Arellano Law Foundation’s digital resources of Philippine laws, statutes, jurisprudence, presidential decrees, executive orders, administrative orders, lawyers tools and other legal materials.

  • List of Philippine Directives and Issuances

     – This website enumerates and gives the full text of all the directives and issuances emanating from the Office of the President. Specifically, the collection consists of Presidential Administrative orders, Executive orders, Proclamations, Memorandum orders, Memorandum circulars and Republic acts covering the period from year 2003 to the present.

  • National Commission of Culture and The Arts (NCCA)

     – NCCA’s homepage is the country’s best site for information on Philippine culture and the arts. Search links for biography of national artists, publications about Philippine culture, art photos and contest announcements, both local and international, including employment opportunities are available. The Commission’s colorful web page is very inviting to explore about with its schedule of activities – from the most celebrated cultural, historical events to the most recently talked about performances, free or fee-based, and awarding ceremonies. The site also highlights varied online resources for the seven (7) arts leading to not only a discovery but of the enrichment of the Filipino soul.

  • National Institute of Standards and Technology (NIST)

     – The NIST Data Gateway allows access to NIST scientific and technical data, encompassing a wide range of information pertaining to varied scientific disciplines and links to some free online NIST database and articles published in the journal of Journal of Physical and Chemical Reference Data (JPCRD).

  • OPEN J-Gate

     – A "database of journal literature, Open J-Gate indexed 6, 310 academic, research, open access journals, with links to full text at Publisher sites".
    OpenThesis – is a free repository of theses, dissertations, and other academic documents, coupled with powerful search, organization, and collaboration tools. 

  • Philippine Journals Online

     – It is a "database of journals published in Philippines, covering the full range of academic disciplines. The objective of Philippine Journals Online is to give greater visibility to the participating journals, and to the research they convey."

  • PubMed Central

     – Offers unrestricted access to the U.S. National Library of Medicine’s digital archive of life sciences journal literature. 

  • Scientific Journals International

     – SJI publishes peer-reviewed open-access journals for all disciplines. SJI has assembled the most prestigious and extensive Editorial and Advisory Board in the world, representing scholars from Princeton, Yale, Oxford, Harvard, Cambridge, MIT, Columbia and other leading universities from around the world.

  • Scirus – a science specific search engine

     – A comprehensive scientific research tool on the web, SCRIRUS provides search links to over 370 million scientific resources. These links enable researchers to access the journal content including scientists’ homepages, courseware, pre-print server materials, patents and institutional repositories and website information.