Deep Web Search Engines
To get started, try using a search engine that specializes in scouring
the invisible web for results. None of these can search the entire invisible
web, but they make some inroads that Google has not as of yet.
- Clusty A metasearch engine that
combines the results of several top search engines.
- Intute A searchable database
of trusted sites, reviewed and monitored by subject specialists.
- INFOMINE A virtual library of
Internet resources relevant to university students and faculty. Built by
librarians from the University of California, California State University,
the University of Detroit-Mercy, and Wake Forest University.
- Librarians' Internet Index A
search engine listing sites deemed trustworthy by actual human librarians,
not just a Googlebot.
- Internet Archive A database of
tens of thousands of movies, live music, audio, texts, and home of the
Wayback Machine that allows you to find old versions of web pages, over 55
- direct search
A list of hundreds of specialty databases and search engines. No longer
maintained, but still perhaps the most complete list of the deep web.
Hundreds of other museums all over the world have their own databases.
This is just a list of the databases for a few of the most popular. Within
these databases are descriptions of the work, its location, and an image of
Musιe du Louvre One of the oldest and most famous art galleries in
the world. Contains Leonardo da Vinci's Mona Lisa and Alexandros
de Antioch's Venus de Milo.
Museum A collection of over 160 classical and new artists,
searchable by artist name, title, date, movement, medium, concept, and
National Portrait Gallery A searchable database of more than 80,000
- The National
Gallery of Art A searchable catalog of all of the museum's 110,000
objects, with images of more than 6,000 available online.
There are tens of thousands of classic books with full text available
online for free. Some authors whose books are available in full text online
include Jane Austen, Charles Dickens, and Fyodor Dostoevsky.
Online Books Page A searchable database of more than 25,000 English
works with full text available for free online.
A searchable database of free online literature from more than 2,000
- Project Gutenberg
A searchable online catalog of more than 19,000 free books with full
text available online.
- The National Academies Press
A searchable directory of 3,000 free books online and 900 for-sale PDFs.
- ebrary A searchable database
of more than 20,000 full-text books.
The most accurate quantitative
often comes from specialty search engines and business
- Explorit Now! A
portal allowing searchable access to numerous business journals and
- AAAAgencySearch.com A
searchable database of advertising agencies from the American Association
of Advertising Agencies.
- Agency ComPile A
searchable database of advertising and other marketing agencies.
- Kompass A business to business
- GPO Access
Economic Indicators A portal to economic indicators from January
1998 to present.
- CBDNet A
searchable database of materials published by the US Department of
- Hoover's A searchable
database of businesses.
- ThomasNet An
industrial product search directory.
- SBA Loan Data A
database of loan program approval activity from the Small Business
GuideStar.org A searchable database of non-profit organizations.
For consumers, authoritative product reviews and pricing information
often times are hidden in the deep web or among subscription-based reports.
- US Consumer
Products Safety Commission Recalled Products A database of recalled
products, sortable by company name.
- Melissa Data
A directory of complete demographic data, sortable by ZIP code.
- Kelley Blue Book A guide to
pricing new and used vehicles.
- Edmunds Another guide to
pricing new and used vehicles.
Reports $ A guide
to consumer product reviews, including cars, appliances,
computers, personal finance,
travel, and more.
Economic and Job Data
A wealth of information regarding microeconomic and macroeconomic data is
available from government sources and other organizations.
Press Release Database A searchable database of press releases
distributed by the European Union.
A searchable directory of free economic data.
- Bureau of Labor Statistics A
directory of job-based and consumer economic data from the US Department
- Salary Wizard Calculator A tool
that shows national average salaries adjusted by location for different
- Economagic A free economic
data directory containing over 200,000 data files.
World Tables A database of purchasing power parity and national
income data for 179 countries for the years 1950-2000.
- America's Job Bank A
searchable database of jobs and resumes.
- USAJOBS A searchable
database of federal government jobs.
- Regional Economic Conditions
(RECON) A database of economic data available by state, county, and
Finance and Investing
A variety of web-based investment analysis tools and
statistics can only be found in the deep web.
- Bankrate.com A directory of
interest rates for different types of loans, mortgages, and savings
- InvestIQ A
database of market data from different world regions.
BigCharts A searchable database of quotes and performance charts for
different stocks and mutual funds.
- SmartMoney.com Tools
A portal of different stock analysis tools.
Trader A database of trading data from the NASDAQ stock exchange.
- SEC Info A searchable database
of EDGAR SEC filings searchable by name, industry, business, SIC code,
area code, topic, CIK, accession number, file number, date, ZIP code, and
Online A database of EDGAR SEC filings searchable by ticker or
These are good places to start researching for background knowledge on
any topic. The subscription-based databases will help intensify any research
by scouring numerous scholarly journals.
- GPO's Catalog of US Government
Publications A searchable database of federal publications, with
links to those available online.
- Smithsonian Institution Libraries
A collection of 20 libraries from the world's largest museum complex.
National Archives A list of all of the National Archives' research
tools and databases.
- HighWire Press A
searchable catalog of the largest repository of free full-text,
peer-reviewed content, from over 900 different journals.
Resources Information Center (ERIC) A catalog of more than 1.2
million bibliographic records, providing links to the full text where
available. Sponsored by the US Department of Education and the Institute
of Education Sciences.
- Encyclopζdia Britannica The
authoritative encyclopedia searchable with full text online.
- Topix.net A news search engine.
- Internet Public Library The
Internet's public library. Fully searchable.
Francisco Public Library - A list of all of the databases offered to
SFPL library card holders. Not a California resident? This is just one
example of many such local public libraries that offer similar services.
$ A searchable database of 236 titles and over
2.8 million entries.
$ The world's largest
collection of public records, unpublished opinions, forms, legal, news,
and business information. Over 35,000 individual sources are searchable
with full-text available online.
- Forrester Research
$ An independent
market research company, publishing in-depth research reports on a variety
$ A searchable
collection of over 10,000 individual sources.
The United States government publishes data on a variety of subjects,
some of which is derived from census data or CIA findings.
- Copyright Records (LOCIS)
A database of copyright records, searchable by documents, serials, and
multimedia (including books, music, films, sound recordings, maps,
software, photos, and art).
American FactFinder A repository of aggregate census bureau data
searchable by city, county, or ZIP code.
- FedStats A gateway to
statistics from over 100 US federal agencies.
- United States Patent and
Trademark Office A database of patent full-text and full-page
Historical Census Browser A data bank of historical US census data
dating back to 1790 compiled by the University of Virginia.
- Geospatial One Stop
A searchable database of geographic data, displayable on maps.
- Grants.gov A
database of grant opportunities, searchable by keyword, funding
opportunity number, or CFDA number.
Opportunities Program Grants Database A database of technology
grants, searchable by keyword, state, and year.
- United States
Government Printing Office (GPO) A search engine for mutliple
government databases, including US budgets, campaign reform hearings, code
of federal regulations, congressional bills, unified agendas, and more.
- CIA Electronic Reading Room A
searchable database of declassified CIA documents.
- POW/MIA Databases
and Documents A datbase of POWs and MIAs information.
- ZIP+4 Lookup A
database of US ZIP codes and ZIP+4 codes, searchable by city or address.
Data on international economic indicators and demographics are available
from US government agencies and international organizations such as World
- International Data
Base (IDB) A computerized data bank of statistical tables and
demographic information for 228 countries and areas.
- FIRST A database of
military aggression and weapons holdings.
- Economics of
Tobacco Control A database of information regarding tobacco usage
and policy in over 180 countries.
- Country Indicators for Foreign
Policy A directory of statistical tables indicating different
countries' foreign policies.
World Bank Data A database of key development data and statistics
for different countries and worldwide groups.
Factbook A reference material published by the CIA, containing
information on every country in the world.
- US International
Trade Statistics A database of international trade statistics,
searchable by country or type of good.
- US Foreign
Trade Highlights A database of information on US international trade
in goods and services.
Energy Information Administration International Energy Data and Analysis
A data bank of energy balances sorted by country.
Law and Politics
Information on Congressional law and other legal and political matters
are available online from
universities, independent organizations, and the US federal government.
- THOMAS (Library of Congress) A
searchable database of legislative information from the Library of
- Law Library of
Congress The largest collection of legal materials in the world,
containing over 2 million volumes.
- Global Legal Information Network
A searchable public database of laws, regulations, judicial decisions, and
other legal sources.
- FindLaw A free legal database
with searchable collections of cases and codes, legal news, and an online
- Office of
Postsecondary Education Security Statistics A searchable database of
college campus crime statistics, sortable by institution type,
instructional program, or campus.
- Bureau of Justice
Statistics A directory of legal and judicial statistics, ranging
from crime to law enforcement to courts and sentencing.
- The Avalon
Project at Yale Law School A searchable database of documents in
law, history, and diplomacy.
Congressional Documents and Debates, 17741873 (Library of Congress)
A directory of historical Congressional records, bills, statutes,
journals, and debates from LOC's American Memory.
Database A searchable database of firms who have spent lobbying
money from 1998.
Activities A directory of the House of Representatives' bill
summary, status, and text, public laws, and roll call votes.
- Project Vote Smart
A database of government officials and election candidates, searchable by
last name or ZIP code.
Library of Congress
The Library of Congress (LOC) is the largest library in the world and
offers catalog descriptions and some full text and images of many of its 130
- Library of Congress A
searchable catalog of the world's largest library, containing over 130
- Library of
Congress Digital Collections A searchable database of the LOC's
items that have been digitized and fully available online.
- Library of Congress
Prints and Photographs Reading Room A searchable catalog of the
Library of Congress' prints and photographs. Results include thumbnails of
Library of Congress Online Catalog The LOC catalog, searchable by
title, author, subject, keyword, call number, ISBN, and more.
- American Memory
The LOC's digital record of American history.
Sound Online Inventory and Catalog (SONIC) A portion of the LOC's
audio collection, searchable by name, title, subject, and keyword.
Medical and Health
Scholarly medical journals as well as government agencies and independent
organizations offer a variety of statistical data and other information
- PubMed *NEW ADDITION* A service
of the U.S. National Library of Medicine that includes over 16 million
citations from MEDLINE and other life science journals for biomedical
articles back to the 1950s. Includes links to full-text articles and
Department of Health National Research Register A searchable
database of records of ongoing or completed project funded by or of
interest to the UK's NHS.
- National Institutes of Health A
searchable encyclopedia of health topics.
- American Hospital
Directory A free searchable directory of US hospital information.
A data bank of world health information, sortable by country, disease,
condition, program, or demographic.
- Centers for
Disease Control and Prevention Data and Statistics A data bank of
statistical health information compiled by the CDC.
- New England Journal of Medicine
$ A scholarly medical
journal with full text of current and past issues available online.
Science journals and databases are searchable through specialty search
engines, while real-time geological data is available from the USGS.
A portal allowing searchable access to numerous scientific journals and
- Science.gov A searchable
gateway to authoritative science information provided by US government
WebCASPAR A database of science and engineering statistical data
- The Complete Work of Charles
Darwin All of Charles Darwin's published texts, fully searchable and
- USGS Real-Time Water Data
A map of the United States showing real-time streamflow and water
quality data of the nation's rivers and reservoirs.
- USGS Earthquake Hazards Program
Maps of California, Nevada, the United States, and the World, showing
real-time earthquake data.
- Ask.com Recent Earthquake
Activity An interactive map of the world, showing real-time
this is a database of over 1.4 million documents from the Institute of
Electronics and Electrical Engineers.
Real-time aviation data as well as historical and current transportation
safety information is available from different US federal government
- FAA Flight Delay
Information A map of the United States with flight delay information
from the nation's largest airports.
- NTSB Accident Database
and Synopses The National Transportation Safety Board's database of
aviation accidents, ranging from 1962 to present.
- NTSB Aviation
Accident Statistics A directory of aggregate aviation accident
statistics from the National Transportation Safety Board
National Highway Traffic Safety Administration A database of car and
car part defects, searchable by item number or car make and model.
- SaferCar.gov A database
of crash test safety ratings for all automobiles since 1990.
- fboweb.com A
real-time flight tracking service, with support for Google Earth.
- FlightAware Another free
flight tracking service, complete with history, graphs, and maps.
A special thanks to Gary Price at
ResourceShelf for his thoughtful suggestions.