Härterei Tandler
Härterei Tandler - Wenn's auf Qualität ankommt. Die Härterei Tandler bietet individuelle Wärmebehandlung für alle Industriebereiche. Dabei wird für ein optimales Ergebnis besonderer Wert auf persönliche, projektbezogene Beratung sowie Termintreue gelegt.
http://www.haerterei-tandler.de

Industrial Metal Treating Corp.
Full range of heat treating services throughout the Mid-Atlantic region including stress relieving, neutral hardening, vacuum hardening and case hardening.
http://www.treatmetal.net

Härterei Reese
Die Härtereien Reese bieten das gesamte Spektrum der Härtetechnik an. Trotz aller Innovation ist aber nach wie vor die über 50jährige Erfahrung in der Härtetechnik ein ganz entscheidender Faktor.
http://www.hardening.com/

Thermo-Bond
Thermo-Bond Flame Hardening Ltd.
http://www.thermobondinduction.com/

Hardened PHP
Adds security hardening features to PHP. Include news, libraries, Hardening patch, services advisories, a forum and a system for advanced protection of PHP installations.
http://www.hardened-php.net/

Hardening OpenBSD Internet Servers
GeodSoft: Web Site Design And Development. Tutorial or how-to harden or improve security on OpenBSD Internet servers. Most techniques are generally applicable to UNIX servers.
http://geodsoft.com/howto/harden/

Network Security Information: UNIX
WindowSecurity.com provides Windows security news, articles, tutorials, software listings and reviews for information security professionals covering topics such as firewalls, viruses, intrusion detection and other security topics.
http://secinf.net/unix_security/

The Hardening of the Modern Synthesis
By Stephen Jay Gould
http://www.stephenjaygould.org/library/gould_synthesis.html

AVES Studio
AVES Studio manufactures synthetic self hardening clay and mache products.
http://www.avesstudio.com

FireTower Inc
Services include assessment, host hardening, content control and policy management.
http://www.firetower.com/