Science & Engineering Encyclopedia: Science and engineering descriptions, equations, conversions, calculators and material data. Organized by A to Z, subject and interlinked. (http://www.diracdelta.co.uk)

Scientific Surveys: The home portal site for websites that focus on the pipeline industry. (http://www.scientificsurveys.com/)

Society for Experimental Mechanics: The SEM site provides news, a book catalog, and information on membership, publications, and conferences. (http://www.sem.org)

Society of Automotive Engineers: The SAE site has technical information as well as information on events, training, membership, community activities, and the SAE organization. (http://www.sae.org/)

Society of Manufacturing Engineers: The SME site provides information on education, tradeshows, magazines, and suppliers as well as members only resources, a bookstore, and news archives. (http://www.sme.org/)

The Society of Naval Architects & Marine Engineers: SNAME is an internationally recognized nonprofit, technical, professional society of individual members serving the maritime and offshore industries and their suppliers. (http://www.sname.org/)

Society of Petroleum Engineers: SPE is for engineers interested in oil and gas exploration and production. Their site provides information on membership, publications, and conferences. (http://www.spe.org)

Society of Tribologists and Lubrication Engineers: STLE's mission is to advance the science of tribology and the practice of lubrication engineering in order to foster innovation, improve the performance of equipment and products, conserve resources, and protect the environment. (http://www.stle.org)

Society for Maintenance & Reliability Professionals: SMRP is an independent non-profit society by and for practitioners in the maintenance and reliability profession. Their site includesinformation on membership, events, suppliers, jobs, and certification. (http://www.smrp.org/)

The Society for Protective Coatings: The SSPC site provides news as well as information on standards, conferences, certification, training, and membership. (http://www.sspc.org)

SpecialChem.com: SpecialChem has an extensive collection of information on polymer addittives and adhesives, as well as services for plastics and rubber processing. (http://www.specialchem.com/)

SPIE - The International Society for Optical Engineering: The SPIE site provides information on publications, journals, education, meetings, membership, and news of interest to engineers working in the field of optics. (http://www.spie.org)

Stainless Steel World: Stainless Steel World is a knowledge center for materials professionals. It has four channels to provide end users, specifiers, and suppliers of corrosion-resistant alloys with up-to-date and directly applicable information: Print, Internet, Conferences & Expositions, and Research & Intelligence. (http://www.stainless-steel-world.net/)

Standards Australia: This Australian Standards site provides information on standards writing, general standards information, discussions of hot topics, a directory, news, a magazine, and links. (http://www.standards.org.au/)

Standards Engineering Society: The SES site provides information on standards throughout the world, its mission, its activities, and an extensive set of links to sites of various codes and standards organizations. (http://www.ses-standards.org/)

State Material Testing Institute: The Staatliche Materialprüfungsanstalt (MPA) site at the Universität Stuttgart has news and information on NDE. (http://www.mpa.uni-stuttgart.de/Mpa_en/MPA-Index.htm)

Steel Founders' Society of America: The SFSA site provides information on their events, casting design and purchase, their publications, steel foundries, metal castings, and links. (http://www.sfsa.org/)

steelonthenet.com:

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Steel Tank Institute: STI members fabricate safe and environmentally friendly storage alternatives for petroleum products which exceed all current Environmental Protection Agency standards. (http://www.steeltank.com/)