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Business

The most accurate quantitative business knowledge often comes from specialty search engines and business directories/databases.

17. Explorit Now! -- A portal allowing searchable access to numerous business journala and databases.

18. AAAAgencySearch.com -- A searchable database of advertising agencies from the American Association of Advertising Agencies.

19. Agency ComPile -- A searchable database of advertising and other marketing agencies.

20. Kompass -- A business to business search engine.

21. GPO Access Economic Indicators -- A portal to economic indicators from January 1998 to present.

22. CBDNet -- A searchable database of materials published by the US Department of Commerce.

23. Hoover's -- A searchable database of businesses.

24. ThomasNet -- An industrial product search directory.

25. SBA Loan Data -- A database of loan program approval activity from the Small Business Administration.

26. GuideStar.org -- A searchable database of non-profit organizations.

Consumer

For consumers, authoritative product reviews and pricing information often times are hidden in the deep web or among subscription-based reports.

27. US Consumer Products Safety Commission Recalled Products -- A database of recalled products, sortable by company name.

28. Melissa Data -- A directory of complete demographic data, sortable by ZIP code.

29. Kelley Blue Book -- A guide to pricing new and used vehicles.

30. Edmunds -- Another guide to pricing new and used vehicles.

31. Consumer Reports $ -- A guide to consumer product reviews, including cars, appliances, electronics, 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.

32. EUROPA Press Release Database -- A searchable database of press releases distributed by the European Union.

33. FreeLunch.com -- A searchable directory of free economic data.

34. Bureau of Labor Statistics -- A directory of job-based and consumer economic data from the US Department of Labor.

35. Salary Wizard Calculator -- A tool that shows national average salaries adjusted by location for different jobs.

36. Economagic -- A free economic data directory containing over 200,000 data files.

37. Penn World Tables -- A database of purchasing power parity and national income data for 179 countries for the years 1950-2000.

38. America's Job Bank -- A searchable database of jobs and resumes.

39. USAJOBS -- A searchable database of federal government jobs.

40. Regional Economic Conditions (RECON) -- A database of economic data available by state, county, and MSA.

Finance and Investing

A variety of web-based investment analysis tools and financial statistics can only be found in the deep web.

41. Bankrate.com -- A directory of interest rates for different types of loans, mortgages, and savings accounts.

42. InvestIQ -- A database of market data from different world regions.

43. BigCharts -- A searchable database of quotes and performance charts for different stocks and mutual