Birds of the World (BOW) is a powerful research database that brings together deep, scholarly content from celebrated works of ornithology with millions of bird observations from eBird and multimedia from the Macaulay Library into a single platform where biologists and birders can explore comprehensive life history information on birds. BOW content is written by ornithologists all over the world and was amassed from four major celebrated works of ornithology: Birds of North America, The Handbook of Birds of the World, Neotropical Birds, and Bird Families of the World.

The platform provides access to Brill's reference works, including: * Brill's New Pauly and Der Neue Pauly have become a recognized standard reference work for students and scholars of the ancient world. Now, the complete original Der Neue Pauly together with Brill’s New Pauly are offered online. New Pauly Online will allow the researcher to have the most complete database available. New Pauly Online is automatically updated whenever a new volume is published. * The Encyclopedia of Islam (New Edition) sets out the present state of our knowledge of the Islamic World. It is a unique and invaluable reference tool, an essential key to understanding the world of Islam, and the authoritative source not only on the religion, but also on the believers and the countries in which they live. * Lexicon Gregorianum Online is the most comprehensive Greek-German dictionary of the language used by Gregory of Nyssa. It is the only dictionary available specifically addressing the vocabulary of late Classical Greek. It documents Gregory's complete vocabulary, taking account of the syntax, meaning and connotations of every occurrence of a key word in his writings. Further reference works may be available due to local subscription.

Brill Scholarly Editions is a text edition platform, providing access to selected Brill's reference works, including: * The Coptic Gnostic Library Online continues where the Dead Sea Scrolls left off. The main sources of information for the Gnostic religion are the so-called Nag Hammadi codices, written in Coptic. * Gregorii Nysseni Opera Online is the ultimate online critical text edition of Gregory of Nyssa's works based on all available known manuscripts, introduced with a complete discussion of the textual transmission and accompanied by extensive annotations on the biblical, classical and patristic sources, and indices. The platform provides interactive reading of text editions supported by critical editions, facsimiles, translations, commentaries, and is designed to display parallel texts side by side.

Brill’s all-new Third Edition of the globally respected Encyclopaedia of Islam (EI3), the preeminent reference work in the field, began publication in the spring of 2007. EI3 is an entirely new work, which rigorously maintains the comprehensiveness and reliability of the great multivolume set, with new articles reflecting the great diversity of current scholarship. The EI3 appears in four substantial parts each year, both online and in print. The new scope includes comprehensive coverage of Islam in the twentieth century, attention to Muslim minorities all over the world, full attention to social science as well as humanistic perspectives.

The Encyclopedia of Law and Religion Online deals with questions of freedom of religion and belief as well as the relation between state and religion in its various aspects, covering all independent nations and jurisdictions along with the major international organizations. Each article provides information on socio-religious facts, historical background, religious communities, religious freedom and the legal situation, such as labor, family and criminal law in the respective country.

The International Encyclopedia of the Social & Behavioral Sciences offers a source of social and behavioral sciences reference material. It comprises over 3,900 articles, commissioned by 71 Section Editors, and includes 90,000 bibliographic references as well as comprehensive name and subject indexes.

Developed cooperatively with scholars and librarians worldwide, Oxford Bibliographies offers exclusive, authoritative research guides across a variety of subject areas. Combining the best features of an annotated bibliography and a high-level encyclopedia, this cutting-edge resource directs researchers to the best available scholarship across a wide variety of subjects.

Oxford Handbooks Online is a collection of handbooks in 17 subject areas, bringing together the world's leading scholars to write review essays that evaluate the current thinking on a field or topic, and make an original argument about the future direction of the debate. For the first time, all Handbooks are available online as well is in print across the subject areas. Monthly updates introduce articles in advance of print publication and beyond the book, online-only content ensures the most current, authoritative coverage anywhere.

"Psyndex - Tests" contains records on psychology from researchers in Germany, Austria, and Switzerland. Compiled by the Leibniz Institute for Psychology Information (ZPID), this database covers about 5,000 extensive descriptions of psychological and educational tests used in the German-speaking countries. "Psyndex - Tests" is bilingual: titles and descriptors are in German and English. German publications are abstracted in German; English publications in English. The database also include theoretical background, testing procedures, test construction, reliability, validity, fields of application, research and other selected literature, a comprehensive discussion, and test reviews. "Psyndex - Tests" is indexed with the Thesaurus of Psychological Index Terms by permission of the American Psychological Association (APA). A bilingual thesaurus is included with the database.

The International Encyclopedia of the Social & Behavioral Sciences, edited by Neil J. Smelser and Paul B. Baltes, is the first attempt in a generation to map the social and behavioral sciences on a grand scale. Not since the publication in 1968 of the International Encyclopedia of the Social Sciences, edited by David L. Sills, has there been such an ambitious project to describe the state of the art in all the fields encompassed within the social and behavioral sciences.

The SpringerLink platform provides MPG staff with access to a huge collection of English and German eBooks from 2005 onwards, as well as the English and the German collection of the Springer Book Archive (1842-2004). In addition, the content of selected book series is available. Includes major reference works and dictionaries. Max Planck researchers who publish a monograph or edited volume with Springer Nature as an Open Access eBook receive a discount on the standard Book Publishing Charge. MPDL covers the costs remaining on a pro rata basis. Further details are available on the MPDL website.

The Arabidopsis Information Resource (TAIR) maintains a database of genetic and molecular biology data for the model higher plant Arabidopsis thaliana. Data available from TAIR includes the complete genome sequence along with gene structure, gene product information, gene expression, DNA and seed stocks, genome maps, genetic and physical markers, publications, and information about the Arabidopsis research community. Gene product function data is updated every week from the latest published research literature and community data submissions. TAIR also provides extensive linkouts from our data pages to other Arabidopsis resources. The Arabidopsis Biological Resource Center at The Ohio State University collects, reproduces, preserves and distributes seed and DNA resources of Arabidopsis thaliana and related species. Stock information and ordering for the ABRC are fully integrated into TAIR.

Wiley Current Protocols contains a collection of updatable step-by-step, reproducible laboratory methods, covering a total of 20,000 protocols across 18 subjects in the life sciences. Each protocol is carefully selected by the editorial board members, written by experts, and rigorously edited to ensure repeated success.

The World Christian Database (WCD) provides comprehensive statistical information on world religions, Christian denominations, and people groups. Extensive data are available on 9,000 Christian denominations, 13,000 ethnolinguistic peoples, as well as data on 5,000 cities, 3,000 provinces and 234 countries.

The World Religion Database (WRD) contains detailed statistics on religious affiliation for every country of the world. It provides source material, including censuses and surveys, as well as best estimates for every religion to offer a definitive picture of international religious demography. It offers best estimates at multiple dates for each of the world’s religions for the period 1900 to 2050.