AGRICOLA (AGRICultural OnLine Access) serves as the catalog and index to the collections of the National Agricultural Library, as well as a primary public source for world-wide access to agricultural information. The database covers materials in all formats and periods, including printed works from as far back as the 15th century.The records describe publications and resources encompassing all aspects of agriculture and allied disciplines, including animal and veterinary sciences, entomology, plant sciences, forestry, aquaculture and fisheries, farming and farming systems, agricultural economics, extension and education, food and human nutrition, and earth and environmental sciences. Although the NAL Catalog (AGRICOLA) does not contain the text of the materials it cites, thousands of its records are linked to full-text documents online, with new links added daily.

The Biodiversity Heritage Library (BHL) is a consortium of 12 natural history and botanical libraries that cooperate to digitize and make accessible the legacy literature of biodiversity held in their collections and to make that literature available for open access and responsible use as a part of a global biodiversity commons. BHL also serves as the foundational literature component of the Encyclopedia of Life (EOL).

BioMed Central Ltd., an independent publisher in London, England, provides free access to biomedical research publications. These publications include biology and medical journals, current reports, and meeting abstracts. BioMed Central offers information about current controlled trials, as well as topics in modern biology. Registration (free) required to search articles, but journals may be freely browsed by title or subject.

DOAJ covers more than 8,500 free, full text, quality controlled scientific and scholarly journals. Use the search field to search journals included in DOAJ. The Directory aims to cover all subjects and languages. Over 4,000 journals are searchable at the article level.

FSTA covers the literature of food science, food technology and nutrition found in over 4,600 publications. The database includes all the major food commodities plus animal science, crop science horticulture, biotechnology, microbiology, food safety (toxicology and hygiene), additives, nutrition, packaging and pet foods. FSTA covers journals, patents, books, conference proceedings, reports, theses, standards and legislation. Produced by the International Food Information Service (IFIS).

Food Science Source provides full-text coverage for more than 1,300 publications, including journals, monographs, magazines, and trade publications, all directly dealing with food industry-related issues. More than 1,000 key food industry and market reports are also included. Areas covered include:

• Agribusiness
• Food & Beverage Science
• Food Packaging
• Food Processing
• Food Safety
• Food Service
• Food Shipping
• Food/Culinary Innovation
• Food-related Product Development

The database also features tens of thousands of additional food industry articles, benchmarks, and best practices, selected from thousands of trade and industry publications.

JSTOR is a highly selective digital library of academic content in many disciplines. The Library of Congress's subscriptions to JSTOR provide access to thousands of scholarly journals in the humanities, social sciences, and sciences. JSTOR works with a diverse group of nearly 1,200 publishers from more than 57 countries to preserve and make their content digitally available.

Also provided is access to JSTOR Daily, which offers a fresh way for people to understand and contextualize their world. JSTOR Daily writers provide insight, commentary, and analysis of ideas, research, and current events, tapping into the rich scholarship on JSTOR. In addition to weekly feature articles, the magazine publishes daily blog posts that provide the backstory to complex issues of the day in a variety of subject areas, interviews with and profiles of scholars and their work, and much more.

PLoS publishes peer-reviewed, open access scientific and medical journals that include original research as well as timely feature articles.

PubMed Central (PMC) is a free digital archive of biomedical and life sciences journal literature at the U.S. National Institutes of Health (NIH), developed and managed by NIH's National Center for Biotechnology Information (NCBI) in the National Library of Medicine (NLM). Participating publishers are encouraged to deposit all their journal contents (and not just research papers or other selected material) in PMC so that the archive becomes a true digital counterpart to NLM's extensive collection of print journals. NLM has also digitized earlier print issues of many of the journals that are in PMC. Although immediate free access to all content is most desirable, a journal may delay release of its full text in PMC for some period of time after publication.