NASA
Nasa: Material Analysis
Describes the use of alloys on the space shuttle, and how to analyze alloys using X-ray fluorescence.
Other
Blue Cross Dental Plans
Blue Cross Health Ins. Co. website summarizes their various dental plans: PPO, Saver Select HMO, Select HMO, Premier Select HMO, Senior Dental PPO, Senior Select HMO, and SmileNet Dental.