BizStats
Useful financial ratios, business statistics & benchmarks,
effective and understandable online analysis of businesses & industries.
http://www.bizstats.com/

British Library Industry Research Guides in PDF Format
Covers advertising, alcoholic drinks, book, childrenswear, confectionery, construction, fashion, fast food & snacks, frozen, chilled & ready made foods, furniture, giftware, green and ethical business opportunities, insurance, jewellery, organic food, packaging, pharmacy, sports, toiletries and cosmetics, toy and game, travel & tourism, tv and film industries.
http://www.bl.uk/bipc/dbandpubs/helpfind/industry.html

Consumer Goods Industries: Export.gov
http://www.ita.doc.gov/td/ocg/index.htm

Cornell University, School of Hotel Management: Industry Guides
Industry guidelines for airlines, amusement, assisted living, bed and breakfast, club management, cookery, cruise lines, facilities management, food service, gaming and casinos, lodging, meets and events, real estate, spas, travel and tourism, and wines
http://www.hotelschool.cornell.edu/research/library/tools/industry/lodging.html

Current Industrial Reports from the U.S. Census Bureau
http://www.census.gov/manufacturing/cir/index.html

Deloitte 2009 Industry Outlook: Challenging Times, Emerging Opportunities
Information on industries: aerospace & defense, automotive, banking & securities, consumer products, energy & resources, health sciences, media and entertainment, process and industrial products, real estate, retail, technology, telecommunication, tourism & hospitality, U.S. federal & state government.
http://www.deloitte.com/view/en_US/us/Insights/hot-topics/2009-Industry-Outlook/index.htm

Fortune 500 Industry List
http://www.pathfinder.com/fortune/fortune500

Hoover's Online: Browse Company Information
http://www.hoovers.com/free/

Industry Research Desk
http://www.virtualpet.com/industry/rdindex2.htm

Industry Guides: From the British Library
http://www.bl.uk/reshelp/findhelpindustry/index.html

Industry Information: Tutorial by Debbie Flanagan
http://www.learnwebskills.com/company/industry.html

Industry Resources Reports
Organized by SIC Code, this site gives annotated links for industry overviews, trends, outlook, forecasts, financial benchmarks, and compensation surveys
http://www.valuationresources.com/IndustryReport.htm

Industry Week Magazine
http://www.industryweek.com/

U.S. Industrial Outlook
http://www.ita.doc.gov/td/industry/otea/outlook/chapters.html

Investopedia.Com Industry Handbook
Brief industry reports with ratios
http://www.investopedia.com/features/industryhandbook/

IRS Market Segment Specialization Program: Audit Techniques Guides for Examiners
Includes industry information
http://www.irs.gov/businesses/small/article/0,,id=108149,00.html

Major Sector Productivity and Costs: Bureau of Labor Statistics
http://www.bls.gov/lpc/

Office of Trade & Economic Analysis: U.S., State, and Metropolitan Trade Data
http://www.ita.doc.gov/td/industry/otea/index.html

Reuters Investor: Industry Information
Click on the Industry link on the left to go to industry and sector reports.
http://www.investor.reuters.com/

ThomasNet Industrial Market Trends
Read the latest news and check out the archived articles arranged by year
http://news.thomasnet.com/IMT/index.html

U.S. Census Bureau: Annual Survey of Service Industries
http://www.census.gov/econ/www/servmenu.html

U.S. Census Bureau: 2002 Economic Census Industry Series Reports
http://www.census.gov/econ/census02/guide/INDSUMM.HTM

U.S. Census Bureau: Annual Survey of Manufacturers
http://www.census.gov/econ/overview/ma0300.html

U.S. Census Bureau: Manufacturing
http://www.census.gov/econ/manufacturing.html

U.S. Census Bureau: Monthly Retail Trade and Food Services
http://www.census.gov/mrts/www/mrts.html

Yahoo Industry Information
http://biz.yahoo.com/industry/

MSN Money: Top 10 Best Performing Industries and Top 10 Worst Performing Industries 
http://moneycentral.msn.com/investor/market/top10industries.asp

SIC/NAICS CODES
Standard Industrial Classifications (SIC) Index
http://www.wave.net/upg/immigration/sic_index.html

SIC Codes with 2 Digit Extensions: Melissa Data
http://www.melissadata.com/Sic/siclookup.asp

NAICS --North American Industry Classification System
http://www.census.gov/epcd/www/naics.html

2002 NAICS Matched to 1987 SIC
http://www.census.gov/epcd/naics02/N2SIC81.HTM

1997 NAICS and 1987 SIC Correspondence Tables
http://www.census.gov/epcd/www/naicstab.htm