Gas Technology Institute: The GTI site provides information on research projects, publications, and software for the gas industry. (http://www.gastechnology.org)

German Society of Nondestructive Testing: The Deutsche Gesellschaft für Zerstörungsfreie Prüfung e.V. (GDFZP) site provides information on statutes, committees, regional groups, conferences, events, publications, training, certification, the DGZfP Buyers´ Guide, and the NDTnet Exhibition. (http://www.dgzfp.de/

GlobalSpec: This specialized search engine focuses exclusively on engineering and technical information. It provides access to technical products and services. (http://www.globalspec.com/)

Government Printing Office: The U.S. GPO site provides access to publications of the United States Government. (http://www.access.gpo.gov/)

Gulf Coast Ammonia Producers: GCAP is an organization of ammonia producing companies formed to share information on the technical, environmental, safety, maintenance, and overall operational elements of ammonia manufacturing. (http://www.ammoniaproducers.org/)

The Hartford Steam Boiler Inspection and Insurance Company: HSB provides services that contribute to the safety, reliability, and efficiency of plants and equipment. (http://www.hsb.com/)

Hazardous Area Direct: Hazardous Area Direct is a member of the Reliability Direct Inc. family. RDI family companies are all web based with a simple vision... offer our customers  high quality products at a competitive price. Our mission is to become a "One Stop Shop" for the Hazardous Area Certified Instrument marketplace. (http://www.hazardousareadirect.com)

Health & Safety Executive: The HSE web site's research publications page provides information on their available reports. (http://www.hse.gov.uk/research/publish.htm)