Automotive

• Air Bags (NHTSA)
• ALLDATA: Offers automotive tips, information on recalls and information on over 2,000 auto parts
• Autopedia: The automotive encyclopedia
• AutoTrader.com
• Autoweek.com
• Car and Driver Online: Current issue, buying guide, and archive of road tests and previews
• Car Connection
• Car Talk: @Cars.com
• Carfax Lemon Check: The first step in knowing your vehicle's history (click FREE Lemon Check at bottom of the page)
• DealerNet
• Edmunds: Where smart car buyers start
• Inner Auto Parts: Automotive Parts Information, Resources, Auto Parts and Car Care 
• Kelley Blue Book: New & used car prices back to 1976 models
• Motor Trend Online
• NASCAR Online
• National Highway Traffic Safety Administration (NHTSA)
• TraderOnline: Classified Ads

Electronics/Energy/Electricity

• CEE News: Electrical construction industry products and news
• U.S. DOE Energy Efficiency and Renewable Energy

Facilities Management

• FMLink-Your Facilities Management Resource on the Internet

Heating, Ventilating, Air Conditioning & Refrigeration (HVAC & R)

• ARI Cool Net: Air-Conditioning & Refrigeration Institute
• ASHRAE Online: American Society of Heating, Refrigerating and Air-Conditioning Engineers, Inc.
• HPAC Engineering: Heating, Piping, Air Conditioning
• HVAC City
• HVAC on the Web
• HVAC Web
• HVACR Business:  The HVACR Management Magazine
• RSES.org: Refrigeration Service Engineers Society
• SMARTHOME - HVAC Temperature Controls

Industrial Safety

• Blotzer's Health, Safety, and Environment Page
• Environmental Protection Agency
• Industrial Safety and Hygiene News with archives back to 7/95
• International Occupational Safety and Health Information Centre: ILO-CIS
• Mine Safety and Health Administration
• NIOSH: National Institute of Occupational Safety and Health
• National Safety Council
• OSH Act of 1970
• OSHA: Occupational Safety and Health Administration, U.S. Department of Labor
• OSHA A-Z Index Page: Occupational Health and Safety Resources
• OSHA Safety and Health Topics 
• OSHWorld
• SafetyLink
• Seton
• SIRI MSDS Index (Material Safety Data Sheets)

Plumbing

• Plumber.com
• PlumbingLinks.com

Quality

• American Risk and Insurance Association (ARIA)
• American Society for Quality (ASQ )
• American Society for Quality Archives
• ASQ InfoSearch: Abstracts from ASQ publishers
• ASQ section 0704:  Valley of the Sun, Phoenix, AZ
• Deming Electronic Network
• Malcom Baldridge National Quality Program (NIST)
• Online Quality Resource Guide
• Quality Progress Magazine
• Quality Resources Online

Technology

• Build.com: Building and Home Improvement Products Directory
• Learn2com: "The ability utility"
• Popular Mechanics: Automotive, Technology, Home Journal, Outdoors, and Science 

Water Technology

• American Water Resources Association (AWRA)
• American Water Works Association (AWWA)
• Arizona Department of Water Resources: (ADWR)
• Arizona Water Protection Fund: Protecting Arizona's Water Habitats
• Arizona Water Science Center (U.S. Geological Survey)
• Central Arizona Project (CAP)
• EPA Office of Ground Water and Drinking Water
• Ground Water Atlas of the United States
• Hydrology Web  
• Internet Resources For Water (Robert J. Teeter)
• Links to Western Water Resources Issues: University of Arizona Hydrology Department  
• National Institutes for Water Resources (NIWR). A gateway to 54 national water resources institutes and centers
• New Mexico Water Resources Research Institute
• Phoenix Water and Sewer Services
• Salt River Project -- SRP
• Tempe Water
• TopoZone - The Web's Topographic Map
• Universities Council on Water Resources (UCOWR)
• U.S. Water News Online
• USGS Mapping Information: Topographic Map Symbols -- Reading Topographic Maps
• Verde NRCD (Verde Natural Resource Conversation District)
• Water Environment Federation
• Water Librarians' Home Page
• Water Online
• Water Quality Association
• Water Quality Information Center (National Agricultural Library)
• Water Resources of the U.S. (U.S. Geological Survey)
• Water Resources Research Center (University of Arizona)
• Water Tech Online: The Internet source for the Water Treatment Industry
• Western States Water Council