NAICS is the standard used by federal statistical agencies in classifying business establishments for the purpose of collecting, analyzing, and publishing statistical data related to the U.S. business economy. Enter a keyword that describes your kind of business. A list of primary business activities containing that keyword and the corresponding NAICS codes will appear. Choose the one that most closely corresponds to your primary business activity, or refine your search to obtain other choices.
NTRS indexes citations, full-text documents, and multimedia content from NACA and NASA publications and research reports. Content includes conference papers, journal articles, meeting papers, patents, research reports, theses and dissertations, images, movies, and technical videos. Full text available as PDFs. 1903-present.
The National Academies Press provides over 4000 free PDF ebooks (most of their published titles). Free registration is required before you can download the PDFs. You can download a single PDF for the entire book, or one for each chapter. We link from the Addison screen for our print copies to the online version on the NAP site. You can browse subject categories or search across the collection.
NASS allows searching and browsing of reports and data sets compiled by the National Agricultural Statistics Service. Reports cover virtually every facet of U.S. agriculture—production and supplies of food and fiber, prices paid and received by farmers, farm labor and wages, and other aspects of the farm industry. Data sets are commodity specific and contains many category breakdowns including U.S., state, and county crop and livestock data. Full-text reports available in PDF and text. Reports 1900s-present; data sets 1866-present.
NACDA provides both data sets relevant to gerontological research and an index of citations for journal articles, books, book chapters, government and agency reports, working papers, dissertations, conference papers, meeting presentations, unpublished manuscripts, magazine and newspaper articles, and audiovisual materials that reference data held in the NACDA and ISCPR archives. 1862-present.
NACJD provides both data sets related to criminal justice and criminology and an index of citations to journal articles, books, book chapters, government and agency reports, working papers, dissertations, conference papers, meeting presentations, and unpublished manuscripts based on this data.
NCES issues numerous publications and datasets each year. These include: early releases, issue briefs, statistical reports, directories, and handbooks of standard terminology, plus library statistics. Reports presented as PDFs; data sets can be customized as HTML tables or downloaded in a variety of formats.
Keyword-searchable and browseable archive of the free online books, journals, working papers, and policy briefs published by the US National Defense University. Also includes links to official US national strategy documents and other documents dealing with military policy. Some linked materials are not accessible to non-NDU users. 1984-present.
The National Jukebox provides streaming music (via an embedded Adobe Flash player) from their collection of music and spoken word recordings and from other participating libraries. You can browse or search for recordings or playlists. 1910-1929.
The NLM Catalog provides access to NLM bibliographic data for journals, books, audiovisuals, computer software, electronic resources and other materials. It contains detailed MEDLINE indexing information about the journals in PubMed and other NCBI databases. Links to the library's holdings in LocatorPlus, NLM's online public access catalog, are also provided. Use Interlibrary Loan to request titles found in this catalog that are not owned locally.
The National Map includes orthoimagery (aerial photographs), elevation, geographic names, hydrography, boundaries, transportation, structures, and land cover. Other types of geographic information can be added within the viewer or brought in with The National Map data into a Geographic Information System to create specific types of maps or map views. The US Topo Maps module provides electronic access to topological maps previously received in print.
NTIS is providing free, public access to the NTRL database of 3 million federal science and technology reports. About 800,000 of these are available as free PDFs; the rest can be purchased or possible obtained through interlibrary loan. You must create a profile on the site before you can search.
Search or browse across eight subject encyclopedias and dictionaries with over 10,000 entries. References are linked via Get VText.
Naxos Music Library provides streaming music from classical, jazz, world music, pop, rock, and Chinese orchestral CDs. NML also provides libretti and synopses for operas, a pronunciation guide for composer and artist names, an overview of musical terms, and work analyses and details with instrumentation, publishers, duration, work information and available recordings.
The NCBI Bookshelf hosts full-text books (mostly as PDFs) that can be searched or browsed. Titles are also linked from other NCBI databases such as PubMed.
The NCJRS: National Criminal Justice Reference Service Abstracts Database indexes abstracts and full-text of journal articles, conference papers, books, and federal, state and local government reports in the field of criminology and criminal justice. The full-text materials are available in both HTML and PDF. 1970-present.
NCJRS indexes abstracts and some full text of journal articles, books, government and technical reports, conference papers, and unpublished research on crime, justice, drugs, law enforcement, and victims. 1950s-present.
The Networked Digital Library of Theses and Dissertations indexes citations, abstracts, and full-text theses and dissertations from around the world. Many are available in full text through this database (otherwise you may be able to request a copy through interlibrary loan). Early 1900s-present.
Neuroscience Abstracts indexes citations and abstracts from journal articles, conference papers, books, and patents in the fields of medicine, neural diseases like Alzheimer's, molecular neurobiology, biological sciences, neurophysiology, and biophysics. You can limit to peer-reviewed sources. 1982-present.
This database indexes citations, abstracts, and some full text for journal and newspaper articles from historical and current, international and domestic newspaper databases on the ProQuest platform. Use the Databases link at the top of the screen to change which databases are searched. You can limit to peer-reviewed sources. 1681-present.
Full-text index of local newspapers. Covers Virginia Tech, Southwest Virginia and the New River Valley, from the Roanoke Times and World News (Jan 1, 1992-Feb 28, 1997), the News Messenger (1963 to June 1998), The Collegiate Times (1970 to June 1998), the Virginia Tech Spectrum (Fall 1994-Spring 2005).
New York Times from ProQuest Historical Newspapers offers full-text and full-image articles for significant newspapers dating back to the 18th Century. The database includes paper-cover-to-cover, with full-page and article images in downloadable PDF format, including front pages, articles, editorials, photos, advertisements, wedding and engagement announcements, cartoons, birth and death announcements, reviews, and more. 1851-2007.
NINES (Networked Infrastructure for Nineteenth-Century Electronic Scholarship) indexes citations to publications, manuscripts, art, and photos, with links to full text (some in restricted access databases) and acts as a clearinghouse for peer-reviewed digital resources, which can be collected, annotated, and re-used in online "exhibits."
NCCO indexes the full text of books, newspapers, pamphlets, manuscripts, maps, diaries, photographs, statistics, literature, government reports, treaties, and other kinds of documents in both Western and non-Western languages as HTML and PDF, plus some image formats. Now includes 12 topical areas from literature to science, politics to religion, and maps to photography. 1789-1925.
The Nineteenth Century Short Title Catalogue indexes bibliographic records or works published in Britain, its colonies, the U.S., and other works in English or translated into English from elsewhere in the world. Records include books and manuscripts, periodicals, directories, and other publications. 1801-1919.
Nucleic Acids Abstracts indexes citations and abstracts from journal articles, conference papers, books, dissertations, and patents in the fields of biochemistry, biological sciences, genetics, biotechnology, and bioengineering. You can limit to peer-reviewed sources. 1982-present.