ICPSR provides both census microdata and aggregate data acquired from the Census Bureau. Microdata is the individual responses to census questions while aggregate data contains tabulations of the individual responses at various levels, such as states, counties, and census tracts. 1940s-present.
The United States Government Manual provides information in ASCII text and PDF on the agencies of the legislative, judicial, and executive branches. It also includes information on quasi-official agencies; international organizations in which the United States participates; and boards, commissions, and committees. The Manual begins with reprints of the Declaration of Independence and the U.S. Constitution. 1995/96-present.
ULI Development Case Studies provides full-text case studies describing the development process of building projects (in HTML). Studies include general descriptions, contact information for the development team, the building site's background and history, special features of the project, what did and did not work on the project, key facts and figures, and photos of the site or floor plans. 1981-present. Limited to simultaneous user.
UlrichsWeb provides information about periodicals: whether a journal is peer reviewed, scholarly, trade, or popular; in which databases it is indexed; publication dates and title changes; and links to Journal Citation Reports for impact factors. Use the Get VText links to see local date coverage.
UNdata indexes data and statistics compiled by United Nations divisions, including official statistics produced by countries and compiled by United Nations data system, as well as estimates and projections. The domains covered are agriculture, crime, education, energy, industry, labour, national accounts, population and tourism. You can also find indicators such as Millennium Development Goals. Data can be downloaded in statistical software formats.
UIS provides statistics tables related to UNESCO's interests: education, literacy, science and technology, culture, and communication. View pre-defined tables or build your own by selecting countries, indicators, and years. Tables can be downloaded in spreadsheet formats or exported to PDFs.
UniGene provides an organized view of the transcriptome. Each UniGene entry is a set of transcript sequences that appear to come from the same transcription locus (gene or expressed pseudogene), together with information on protein similarities, gene expression, cDNA clone reagents, and genomic location.
The ULAN is a structured vocabulary currently containing around 293,000 names and other information about artists. Names in ULAN may include given names, pseudonyms, variant spellings, names in multiple languages, and names that have changed over time (e.g., married names). Among these names, one is flagged as the preferred name.
UN Comtrade provides standardised official annual trade statistics reported by countries and reflects international merchandise flows detailed by commodity and partner country with coverage reaching up to 99 percent of world merchandise trade. 1963-present
USAHA provides full-text proceedings in PDF (one per volume). 2002-present.