The portal of the ACM (Association of Computing Machinery) offers access to the ACM Digital Library and the Guide to Computing Literature. The ACM Digital Library you will find the online version of the 40 ACM journals and all ACM proceedings, transactions and other ACM publications with archive. In the Guide to Computing Literature there are more than 750,000 references of non-ACM works.

Abstracts and full text articles from 16 journals published by ASM.

Analytical Abstracts is a bibliographical database for the field of analytical chemistry. It covers the period from 1980 onwards. AA covers more than 3,000 international journals in 12 languages, books, standard methods and application notes.

Open access database, especially in the disciplines of physics, astronomy, mathematics, computer sciences, quantitative biology and statistics.

Astrophysics Data System Abstract Service provides a gateway to the online Astronomy and Physics literature

Access to more than 200 BMC electronic journals and to bibliographical information from a large number of biomedical journals.

Overall database of literature references from 1910 onwards for veterinary medicine, animal production, agriculture and related sciences, such as human nutrition, and management & conservation of natural resources.

CiteSeer is a scientific literature digital library and search engine that focuses primarily on the literature in computer and information science.

A clinical search engine that supports clinical decisions by making it easier to find and apply relevant knowledge. It includes a large collection of (study) books, journals, clinical overviews, videos, images and more.

Information on the effectiveness of health care on the grounds of evidence-based medicine. Includes The Cochrane Database of Systematic Reviews, Database of Abstracts of Reviews of Effectiveness, and The Cochrane Controlled Trials Register.

Open access database on computer science.

Embase enables to search across EMBASE (1974-...) and MEDLINE (1966-...) concurrently.
EMBASE (Exerpta Medica Database) is the European counterpart of MEDLINE; only EMBASE and unique MEDLINE records are presented (already de-duplicated).
Key topics are pharmacology, drug development, medical education and health care management.
Embase consists of 18 million records from 6,500 journals from 70 countries. Embase is updated daily; yearly some 600,000 references are added.

Database containing over 4 million references to journal articles, reports, conference proceedings, books and internet sources on energy R&D (a.o. coal and fossil fuels, nuclear energy, renewable energy technologies and storage of energy). In many cases there is a direct link to the full-text.
ETDEweb is a product of the international Energy Technology Data Exchange project, in which 14 member countries participate as well as the International Energy Agency (IEA), US Department of Energy (DOE) and the International Nuclear Information System (INIS).

Mathematical literature of the Göttinger Digitalisierungszentrum GDZ. The Center for Retrospective Digitization in Göttingen has as its task to record data such as prints, manuscripts and illustrations and to present them.

Index of over 50 million articles, books, dissertations and patents covering all subjects. Google Scholar gives you also citation information.
The link to information about availability within Utrecht University is not given through the UBU link button, but through the links Fulltext@UBUlink when there is a full text available within UBU, or, UBU link when there is no digital full text but possibly a printed version.
N.B. The Fulltext&UBUlink works only from library pages. Off-campus access: Login with your Solis ID and password.
Find out more on search options and other possibilities? Check the Google Scholar LibGuide.

GreenFILE is a literature database concerned with the human impact on the environment. It holds over 300.000 records describing articles, reports and (US) government documents. GreenFILE is multidisciplinary in character. For some journals it covers historical volumes as well. The coverage of these, together with reports and government documents makes GreenFILE a worthwhile addition to large general scientific databases such as Scopus or Web of Science.

ICSD provides access to Inorganic Crystal Structure Database: X-ray analyses of inorganic compounds.

The IEEE Computer Society Digital Library offers access to 26 periodicals with archive from 1968 and more than 2,700 conference publications, archived back to 1995.

IEEE Xplore is a research database for discovery of journal articles, conference proceedings, technical standards, and related materials on computer science, electrical engineering and electronics, and allied fields. It contains material published mainly by the Institute of Electrical and Electronics Engineers (IEEE) and other partner publishers like Institution of Engineering and Technology (IET).
NOTE: Anyone can search IEEE Xplore and find bibliographic records and abstracts for its contents, while access to full-text documents requires an individual or institutional subscription.

Bibliography in the field of History of Science, Technology, and Medicine.

JSTOR offers full-text access to an archive database of ca. 700 English-language journals in various disciplines. All volumes (including the earliest) are available and can be searched in full text; the most recent years are not included in this archive due to copyright. Collections: Arts and Sciences I, II, III, V en VII, Business, Collection Ireland, Ecology and Botany, Health and General sciences, Language and Literature.
If you are interested in text mining options, please contact the library (library@uu.nl).

MathEduc is a database offering a world-wide overview of literature on research, theory and practice in mathematics education. MathEduc also covers education in computer science on the elementary level. About 500 journals from all over the world are evaluated as well as books and teaching material.

MathSciNet, published by the American Mathematical Society, offers online access to articles from Mathematical Reviews and Current Mathematical Publications: abstracts and reviews from 1940, and bibliographic references from 1864.

Microsoft Academic Search (MAS) is a search engine for scholarly publications: journal articles, conference proceedings etc., but it does not cover books. MAS is Microsoft’s answer to Google Scholar.
MAS offers advanced search options, graphic views of author networks, citation data and support browsing by subject, journal, author etc.
Coverage of humanities in particular is much smaller than that at Google Scholar.

This database contains all relevant information about Dutch environmental law: legislation, case-law, commentaries, abstracts of journal articles and addresses of environmental organizations. Text only in Dutch!

Natural Product Updates is a Current-Awareness Database with chemical formulae and brief abstracts on new developments in the chemistry of natural products, selected from a large number of leading journals.

Index of millions of publications that have become available for free through the Open Archive Initiative (OAI). These are mainly in publication repositories of universities and in the growing number of free Open Archive journals. Many of these publications are not in regular journal databases.
In principle OAIster covers all subjects. For all publications there are links to the full text.

PiCarta searches the Dutch Central Catalogue NCC, Online Contents and a number of bibliographical databases with a single search question. These sources can also be accessed separately through the 'Other databases' menu. You can restrict the search result to specific types of publications with 'Search options'. Hits can be sorted according to relevance or publication year. Consult the help function for advanced searches.

PrimateLit provides bibliographic access to the scientific literature on nonhuman primates. Coverage of the database spans 1940 to present.

An integrated access to journals and reference works published by the American Psychiatric Association (including DSM Library).

PubMed provides free access to the MEDLINE database, PreMEDLINE (PubMed in process) and links to molecular biology and genetic databases. Contains records from 1950 onwards.
Know more about searching and other options in PubMed? Go to the PubMed LibGuide.

Reaxys provides access to CrossFire Beilstein (Organic Chemistry), Gmelin (inorganic and organometallic chemistry) and Patent Chemistry Database (organic chemistry and life science).

SCI is part of Web of Science.
Web of Science searches the Science Citation Index (1899-...), Social Sciences Citation Index (1898-...), and Arts & Humanities Citation Index (1975-...) together.
To search SCI only, go to MORE SETTINGS below on the starting page and make sure only SCI is selected.

For more information, see Web of Science.

Scopus is both a bibliographic database and a citation index in all fields of sciences. Over 21,000 scientific journals are indexed, and since 2013 books and book chapters are included; where possible journals are indexed from the very first volume onwards. In the search results you can filter by document type. Patents will be presented separately.
Citation information is based on references in documents published from 1996 onwards.
Mekentosj Papers account ID is 21878.
Scopus does not support Internet Explorer 8 (IE8) or lower. Use IE 9 or higher, Firefox or Chrome.
Find out more about searching and other options in Scopus? Check the Scopus LibGuide.

The Stanford Physics Information Retrieval System is the oldest and most complete citation database for high-energy physics. SPIRES searches journal articles, but also preprint papers and working papers. In all it has some 750,000 records, over half of which have full text links.

With LINK, Springer-Verlag and its associated companies offer online access to over 1250 journals (including all former Kluwer Academic journals) and ca. 30,000 of the 40,000 e-books in various disciplines.

Springer's MyCOpy
Springer also offers Utrecht University staff and students a black & white softcover print copy of its e-books against a reduced price of € 24,99 in Springer's so called MyCopy programme.

Synthetic Reaction Updates is a literature updating service which keeps you up to date with recent developments in synthetic organic chemistry. Covering a wide range of primary sources, Synthetic Reaction Updates includes the most important reactions published in the recent scientific literature, presented as easy to read reaction schemes that are searchable by topic and reaction type.

Toxnet provides access to 14 databases on toxicology, hazardous chemicals and related areas. E.g.: Hazardous Substances Data Bank (HSDB), Toxics Release Inventory (TRI), Toxicology Literature Search (TOXLINE) and a database on chemical structures, nomenclature, etc. (ChemIDplus).
Toxnet is edited by the National Library of Medicine.

UpToDate provides instant access to current clinical information and recommendations on patient care and treatment by continuous reviewing of 290 journals.

Web of Science is a bibliography as well as a citation index. It offers a combined access to three citation indexes: Science Citation Index Expanded (SCI) (1899-...), Social Sciences Citation Index (SSCI) (1898-...), and Arts & Humanities Citation Index (A&HCI) (1975-...), including Conference Proceedings Citation Index. Via Citation Databases below on the starting page, you can select one of these databases.
Weekly updates. Access via ISI Web of Knowledge.
More information.

WebCSD provides access to the Cambridge Structural Database of Organic and Organometallic compounds.

Index to literature on wild mammals, birds, reptiles and amphibians, covering all aspects of wildlife and wildlife management.
Over 600.000 bibliographic records (18.000 new records per year), many including abstracts.

The Zentralblatt MATH Database is an abstracting and reviewing service in pure and applied mathematics and contains more than 2 million entries drawn from more than 2,300 serials and journals. It covers the period from 1868 - present.