ChemIDplus Database: Dictionary of over 370,000 chemicals (names, synonyms, and structures). Includes links to NLM (National Library of Medicine) and other databases and resources.

CCD Chemexper Chemical Directory The chemical directory on the Internet and the powerful search engine that allows you to find a chemical by its molecular formula, IUPAC name, common name, CAS number, catalog number, substructure or physical characteristics.

NIST Chemistry WebBook You can search for data on specific compounds, based on name, chemical formula, CAS registry number, molecular weight, or selected ion energetics and spectral properties.

NIST Atomic Spectra Database (ASD) contains data for radiative transitions and energy levels in atoms and atomic ions. Data are included for observed transitions of 99 elements and energy levels of 56 elements. ASD contains data on about 950 spectra from about 1 Å (ångströms) to 200 ΅m (micrometers), with about 72,000 energy levels and 102,000 lines, 40,000 of which have transition probabilities listed. The most current NIST-evaluated data associated with each transition are integrated under a single listing.

PHYSICAL REFERENCE DATA of the NIST Physics Laboratory, including physical constants, atomic and molecular spectroscopy, ionizing radiation and dosimetry, nuclear and condensed matter physics, and more.

wwwChemicals Chemical Supplier Directory

SPIRES HEP Database:a High Energy Physics Literature Database

RUDI-Resource for Urban design Information: An independent unbiased service, the Resource for Urban Design Information (RUDI) is the largest web resource dedicated to urban design and placemaking. RUDI commissions, researches and creates materials for professionals in the public and private sector. As part of a value-added membership service, we also identify and provide immediate access to significant studies, guidance, best practice and other documents contributed by professional and government bodies, practitioners, academics and community organisations.

TechXtra TechXtra is a free service which can help you find articles, books, the best websites, the latest industry news, job announcements, technical reports, technical data, full text eprints, the latest research, thesis & dissertations, teaching and learning resources and more, in engineering, mathematics and computing.

physicsworld.com: news, views and information for the global physics community from IOP (Institute of Physics) Publishing

Material Safety Data Sheets Internet Resources for MSDS

The Chemical Database. This database will allow the user to retrieve information for any of 25,4945 hazardous chemicals or 'generic' entries based on a keyword search. Potential keywords include names, formula and registry numbers (CAS, DOT, RTECS, EINECS, PubChem, Beilstein and Merck).

Chemcompass. The product-, company- and service database of the chemical sector. Find here more than 3,100 producers and traders and more than 170,000 products!

Nobelprize.org - Chemistry: all Nobel Prizes in Chemistry 1901 - 2009 by the official Web Site of the Nobel Prize.

Nobelprize.org - Physics: all Nobel Prizes in Physics 1901 - 2009 by the official Web Site of the Nobel Prize.

WebElements. WebElements aims to be a high quality source of information on the WWW relating to the periodic table. Coverage is such that professional scientists and students at school will all find something useful. You will find thousands of graphics showing elements structures and periodic properties here.

Chemical Elements.com. An Online interactive Periodic Table of the Elements.

Astrophysics Data System - ADS Abstract Service : The SAO (Smithsonian Astrophysical Observatory)/NASA Astrophysics Data System Abstract Service provides a gateway to the online Astronomy and Physics literature. You can navigate this content using the following query interfaces: Basic Search, which searches the entire body of literature (8,497,631 records) currently indexed in the ADS. Astronomy and Astrophysics Search, an advanced interface which searches the 1,747,685 records currently in the Astronomy database, including 144,701 abstracts from Planetary Sciences and Solar Physics journals.   Physics and Geophysics Search, an advanced interface which searches the 5,596,524 records currently in the Physics database, including 473,565 abstracts from APS journals and 301,841 abstracts from SPIE conference proceedings. arXiv Preprints Search, an advanced interface which searches the 617,299 records consisting of all the papers published in the arXiv e-print archive. Science Education Search, a basic interface to the literature in Science Education Research and related publications (a selected subset of publications from the above databases). Topic Search (beta), an experimental interface providing users with capability of finding the most relevant, most recent, most important, most popular, most useful and most instructive papers on a particular topic.

Astrophysics Data System - ADS Article Service : This service provides free and unrestricted access to scanned images of journals, conference proceedings and books in Astronomy and Astrophysics. The articles can be accessed in three ways: Through the article service for journals and conference proceedings: Users can query by volume and page number for a specific article. Through the table of contents service: Users can generate a list of all the articles published in an issue of a journal. Through the abstract service: Any abstract for which a scanned article is available will contain in its page additional options allowing users to view or print the article. 

ACM Digital Library: The Digital Library contains bibliographic information and the full-text of articles published in ACM (Association for Computing Machinery) journals, magazines, and conference proceedings. Access to full-texts of articles is available by subscription or pay-per-view only. Searching is available to anyone for free but requires registration or an account.

ChemWeb.com: Journal Abstracts from chemistry publishers such as Bentham, Elsevier, Springer and others covering over 500 journals can be searched and accessed for free. Search by title and issue or use Journal Search for full-text search of abstracts across all journals. If you are not a member - join now - membership is free and takes just a minute to register. Members have exclusive content access and can participate in the many ChemWeb community features.

Civil Engineering Database (CEDB) : ASCE's (American Society of Civil Engineers) free information retrieval service providing access to over 170,000 bibliographic records of all ASCE publications. The database covers all the journals, conference proceedings, books, standards, manuals, magazines, and newspapers. Journal papers with abstracts go back to 1970. Non-abstract journal records go back to 1958. The book records are complete dating back to the early 1900s. The database is constantly expanded and enriched. Engineering subject areas include: Aerospace Engineering; Architectural Engineering; Bridges; Cold Regions; Computer Practices; Construction; Earthquake Engineering; Education; Engineering Mechanics; Environmental Engineering; Forensic Engineering; Geotechnical Engineering; Geomechanics; Highways; Hydrology; Hydraulics; Irrigation and Drainage; Management; Materials Engineering; Structural Engineering; Transportation; Urban Planning; Water Resources; Waterway, Port, Coastal and Ocean Engineering

GSA (Geological Society of America) Electronic Retrospective Index : Includes data from: Geology articles (1973-2000), GSA Bulletin articles (1972-2000) and GSA Today science articles (1991-2000)

INFOTRIEVE - Article Finder: a database of scientific, technical, medical, and other scholarly content. Contains 26 million citations and 8.5 million abstracts from over 54,000 journals.

EnergyFiles - Energy Science and Technology Virtual Library: At this site you will find over 500 databases and Web sites containing information and resources pertaining to science and technology of interest to the Department of Energy, with an emphasis on the physical sciences.  Sponsored, developed, and maintained by the Department of Energy's Office of Scientific and Technical Information (OSTI), EnergyFiles combines information, tools, and technologies to facilitate access to and use of scientific resources.

lanl.arXiv.org: arXiv provides open access to 617,767 e-prints in the fields of physics, mathematics, non-linear science, computer science, quantitative biology and statistics. It is owned, operated and funded by Cornell University, a private not-for-profit educational institution. arXiv is also partially funded by the National Science Foundation.

YKI library databases: YKI, Institute for Surface Chemistry, is the internationally leading industrial research institute in applied surface and colloid chemistry.The YKI Library database (free access) comprises about 5100 books and is continuously renewed with new book purchases. Lists of recently acquired books, theses, proceedings etc are published twice a year.

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. The collection currently contains more than 3 millions of references (mostly to journal articles, conference papers and technical reports), clustered in about 1500 bibliographies, and consists of more than 2.3 GBytes (530MB gzipped) of BibTeX entries. More than 600 000 references contain crossreferences to citing or cited publications. More than 1 million of references contain URLs to an online version of the paper. Abstracts are available for more than 800 000 entries. There are more than 2000 links to other sites carrying bibliographic information.

ΑΡΤΕΜΙΣ : Διαπανεπιστημιακό σύστημα ψηφιακής βιβλιοθήκης για την ηλεκτρονική τεκμηρίωση της σύγχρονης ελληνικής γκρίζας βιβλιογραφίας. Παρέχει στοιχεία μη δημοσιευμένης βιβλιογραφίας (γκρίζα βιβλιογραφία) η οποία περιλαμβάνει τις διπλωματικές, μεταπτυχιακές και διδακτορικές εργασίες, τις εσωτερικές (τεχνικές) αναφορές, τις σημειώσεις διδασκαλίας κ.α. Το σύστημα ΑΡΤΕΜΙΣ αναπτύχθηκε στο πλαίσιο της οριζόντιας δράσης βιβλιοθηκών ΑΕΙ - ΤΕΙ, με σκοπό τη συστηματική αρχειοθέτηση και διάδοση της πνευματικής παραγωγής των ΑΕΙ και ΤΕΙ της χώρας με τη βοήθεια της τεχνολογίας των ψηφιακών βιβλιοθηκών.

Electronic Theses and Dissertations (ETDs) from NDLTD (Networked Digital Library of Theses and Dissertations): NDLTD is an international organization dedicated to promoting the adoption, creation, use, dissemination, and preservation of electronic theses and dissertations. NDLTD's website includes resources for university administrators, librarians, faculty, students, and the general public. Topics include how to find, create, and preserve ETDs; how to set up an ETD program; legal and technical questions; and the latest news and research in the ETD community.

AIAA ELECTRONIC LIBRARY: The AIAA (American Institute of  Aeronautics and Astronautics) Electronic Library contains more than four decades of technical information and documents. Online. Accessible. And fully equipped to meet your needs. Plus, we're constantly adding interactive features to take our offerings far beyond the limitations of print.

DTIC's Technical Reports Collection: DTIC (Defense Technical Information Center) offers a variety of information resources among them Technical Reports (TR) Database. TR Database contains nearly two million reports in print and nonprint (software, datafiles, databases and videorecordings) format conveying the results of Defense-sponsored research, development, test and evaluation (RDT&E) efforts.

Networked Computer Science Technical Reports Library: NCSTRL is an international collection of computer science technical reports from CS departments and industrial and government research laboratories, made available for non-commercial and eduational use.